1 /*************************************************
2 * Exim - an Internet mail transport agent *
3 *************************************************/
5 /* Copyright (c) University of Cambridge 1995 - 2016 */
6 /* See the file NOTICE for conditions of use and distribution. */
8 /* The main code for delivering a message. */
15 /* Data block for keeping track of subprocesses for parallel remote
18 typedef struct pardata {
19 address_item *addrlist; /* chain of addresses */
20 address_item *addr; /* next address data expected for */
21 pid_t pid; /* subprocess pid */
22 int fd; /* pipe fd for getting result from subprocess */
23 int transport_count; /* returned transport count value */
24 BOOL done; /* no more data needed */
25 uschar *msg; /* error message */
26 uschar *return_path; /* return_path for these addresses */
29 /* Values for the process_recipients variable */
31 enum { RECIP_ACCEPT, RECIP_IGNORE, RECIP_DEFER,
32 RECIP_FAIL, RECIP_FAIL_FILTER, RECIP_FAIL_TIMEOUT,
35 /* Mutually recursive functions for marking addresses done. */
37 static void child_done(address_item *, uschar *);
38 static void address_done(address_item *, uschar *);
40 /* Table for turning base-62 numbers into binary */
42 static uschar tab62[] =
43 {0,1,2,3,4,5,6,7,8,9,0,0,0,0,0,0, /* 0-9 */
44 0,10,11,12,13,14,15,16,17,18,19,20, /* A-K */
45 21,22,23,24,25,26,27,28,29,30,31,32, /* L-W */
46 33,34,35, 0, 0, 0, 0, 0, /* X-Z */
47 0,36,37,38,39,40,41,42,43,44,45,46, /* a-k */
48 47,48,49,50,51,52,53,54,55,56,57,58, /* l-w */
52 /*************************************************
53 * Local static variables *
54 *************************************************/
56 /* addr_duplicate is global because it needs to be seen from the Envelope-To
59 static address_item *addr_defer = NULL;
60 static address_item *addr_failed = NULL;
61 static address_item *addr_fallback = NULL;
62 static address_item *addr_local = NULL;
63 static address_item *addr_new = NULL;
64 static address_item *addr_remote = NULL;
65 static address_item *addr_route = NULL;
66 static address_item *addr_succeed = NULL;
67 static address_item *addr_dsntmp = NULL;
68 static address_item *addr_senddsn = NULL;
70 static FILE *message_log = NULL;
71 static BOOL update_spool;
72 static BOOL remove_journal;
73 static int parcount = 0;
74 static pardata *parlist = NULL;
75 static int return_count;
76 static uschar *frozen_info = US"";
77 static uschar *used_return_path = NULL;
81 /*************************************************
82 * Make a new address item *
83 *************************************************/
85 /* This function gets the store and initializes with default values. The
86 transport_return value defaults to DEFER, so that any unexpected failure to
87 deliver does not wipe out the message. The default unique string is set to a
88 copy of the address, so that its domain can be lowercased.
91 address the RFC822 address string
92 copy force a copy of the address
94 Returns: a pointer to an initialized address_item
98 deliver_make_addr(uschar *address, BOOL copy)
100 address_item *addr = store_get(sizeof(address_item));
101 *addr = address_defaults;
102 if (copy) address = string_copy(address);
103 addr->address = address;
104 addr->unique = string_copy(address);
111 /*************************************************
112 * Set expansion values for an address *
113 *************************************************/
115 /* Certain expansion variables are valid only when handling an address or
116 address list. This function sets them up or clears the values, according to its
120 addr the address in question, or NULL to clear values
125 deliver_set_expansions(address_item *addr)
129 const uschar ***p = address_expansions;
130 while (*p) **p++ = NULL;
134 /* Exactly what gets set depends on whether there is one or more addresses, and
135 what they contain. These first ones are always set, taking their values from
136 the first address. */
138 if (!addr->host_list)
140 deliver_host = deliver_host_address = US"";
141 deliver_host_port = 0;
145 deliver_host = addr->host_list->name;
146 deliver_host_address = addr->host_list->address;
147 deliver_host_port = addr->host_list->port;
150 deliver_recipients = addr;
151 deliver_address_data = addr->prop.address_data;
152 deliver_domain_data = addr->prop.domain_data;
153 deliver_localpart_data = addr->prop.localpart_data;
155 /* These may be unset for multiple addresses */
157 deliver_domain = addr->domain;
158 self_hostname = addr->self_hostname;
160 #ifdef EXPERIMENTAL_BRIGHTMAIL
161 bmi_deliver = 1; /* deliver by default */
162 bmi_alt_location = NULL;
163 bmi_base64_verdict = NULL;
164 bmi_base64_tracker_verdict = NULL;
167 /* If there's only one address we can set everything. */
171 address_item *addr_orig;
173 deliver_localpart = addr->local_part;
174 deliver_localpart_prefix = addr->prefix;
175 deliver_localpart_suffix = addr->suffix;
177 for (addr_orig = addr; addr_orig->parent; addr_orig = addr_orig->parent) ;
178 deliver_domain_orig = addr_orig->domain;
180 /* Re-instate any prefix and suffix in the original local part. In all
181 normal cases, the address will have a router associated with it, and we can
182 choose the caseful or caseless version accordingly. However, when a system
183 filter sets up a pipe, file, or autoreply delivery, no router is involved.
184 In this case, though, there won't be any prefix or suffix to worry about. */
186 deliver_localpart_orig = !addr_orig->router
187 ? addr_orig->local_part
188 : addr_orig->router->caseful_local_part
189 ? addr_orig->cc_local_part
190 : addr_orig->lc_local_part;
192 /* If there's a parent, make its domain and local part available, and if
193 delivering to a pipe or file, or sending an autoreply, get the local
194 part from the parent. For pipes and files, put the pipe or file string
195 into address_pipe and address_file. */
199 deliver_domain_parent = addr->parent->domain;
200 deliver_localpart_parent = !addr->parent->router
201 ? addr->parent->local_part
202 : addr->parent->router->caseful_local_part
203 ? addr->parent->cc_local_part
204 : addr->parent->lc_local_part;
206 /* File deliveries have their own flag because they need to be picked out
207 as special more often. */
209 if (testflag(addr, af_pfr))
211 if (testflag(addr, af_file)) address_file = addr->local_part;
212 else if (deliver_localpart[0] == '|') address_pipe = addr->local_part;
213 deliver_localpart = addr->parent->local_part;
214 deliver_localpart_prefix = addr->parent->prefix;
215 deliver_localpart_suffix = addr->parent->suffix;
219 #ifdef EXPERIMENTAL_BRIGHTMAIL
220 /* Set expansion variables related to Brightmail AntiSpam */
221 bmi_base64_verdict = bmi_get_base64_verdict(deliver_localpart_orig, deliver_domain_orig);
222 bmi_base64_tracker_verdict = bmi_get_base64_tracker_verdict(bmi_base64_verdict);
223 /* get message delivery status (0 - don't deliver | 1 - deliver) */
224 bmi_deliver = bmi_get_delivery_status(bmi_base64_verdict);
225 /* if message is to be delivered, get eventual alternate location */
226 if (bmi_deliver == 1)
227 bmi_alt_location = bmi_get_alt_location(bmi_base64_verdict);
232 /* For multiple addresses, don't set local part, and leave the domain and
233 self_hostname set only if it is the same for all of them. It is possible to
234 have multiple pipe and file addresses, but only when all addresses have routed
235 to the same pipe or file. */
240 if (testflag(addr, af_pfr))
242 if (testflag(addr, af_file)) address_file = addr->local_part;
243 else if (addr->local_part[0] == '|') address_pipe = addr->local_part;
245 for (addr2 = addr->next; addr2; addr2 = addr2->next)
247 if (deliver_domain && Ustrcmp(deliver_domain, addr2->domain) != 0)
248 deliver_domain = NULL;
250 && ( !addr2->self_hostname
251 || Ustrcmp(self_hostname, addr2->self_hostname) != 0
253 self_hostname = NULL;
254 if (!deliver_domain && !self_hostname) break;
262 /*************************************************
263 * Open a msglog file *
264 *************************************************/
266 /* This function is used both for normal message logs, and for files in the
267 msglog directory that are used to catch output from pipes. Try to create the
268 directory if it does not exist. From release 4.21, normal message logs should
269 be created when the message is received.
272 filename the file name
273 mode the mode required
274 error used for saying what failed
276 Returns: a file descriptor, or -1 (with errno set)
280 open_msglog_file(uschar *filename, int mode, uschar **error)
282 int fd = Uopen(filename, O_WRONLY|O_APPEND|O_CREAT, mode);
284 if (fd < 0 && errno == ENOENT)
286 (void)directory_make(spool_directory,
287 spool_sname(US"msglog", message_subdir),
288 MSGLOG_DIRECTORY_MODE, TRUE);
289 fd = Uopen(filename, O_WRONLY|O_APPEND|O_CREAT, mode);
292 /* Set the close-on-exec flag and change the owner to the exim uid/gid (this
293 function is called as root). Double check the mode, because the group setting
294 doesn't always get set automatically. */
298 (void)fcntl(fd, F_SETFD, fcntl(fd, F_GETFD) | FD_CLOEXEC);
299 if (fchown(fd, exim_uid, exim_gid) < 0)
304 if (fchmod(fd, mode) < 0)
310 else *error = US"create";
318 /*************************************************
319 * Write to msglog if required *
320 *************************************************/
322 /* Write to the message log, if configured. This function may also be called
326 format a string format
332 deliver_msglog(const char *format, ...)
335 if (!message_logs) return;
336 va_start(ap, format);
337 vfprintf(message_log, format, ap);
345 /*************************************************
346 * Replicate status for batch *
347 *************************************************/
349 /* When a transport handles a batch of addresses, it may treat them
350 individually, or it may just put the status in the first one, and return FALSE,
351 requesting that the status be copied to all the others externally. This is the
352 replication function. As well as the status, it copies the transport pointer,
353 which may have changed if appendfile passed the addresses on to a different
356 Argument: pointer to the first address in a chain
361 replicate_status(address_item *addr)
364 for (addr2 = addr->next; addr2; addr2 = addr2->next)
366 addr2->transport = addr->transport;
367 addr2->transport_return = addr->transport_return;
368 addr2->basic_errno = addr->basic_errno;
369 addr2->more_errno = addr->more_errno;
370 addr2->special_action = addr->special_action;
371 addr2->message = addr->message;
372 addr2->user_message = addr->user_message;
378 /*************************************************
379 * Compare lists of hosts *
380 *************************************************/
382 /* This function is given two pointers to chains of host items, and it yields
383 TRUE if the lists refer to the same hosts in the same order, except that
385 (1) Multiple hosts with the same non-negative MX values are permitted to appear
386 in different orders. Round-robinning nameservers can cause this to happen.
388 (2) Multiple hosts with the same negative MX values less than MX_NONE are also
389 permitted to appear in different orders. This is caused by randomizing
392 This enables Exim to use a single SMTP transaction for sending to two entirely
393 different domains that happen to end up pointing at the same hosts.
396 one points to the first host list
397 two points to the second host list
399 Returns: TRUE if the lists refer to the same host set
403 same_hosts(host_item *one, host_item *two)
407 if (Ustrcmp(one->name, two->name) != 0)
410 host_item *end_one = one;
411 host_item *end_two = two;
413 /* Batch up only if there was no MX and the list was not randomized */
415 if (mx == MX_NONE) return FALSE;
417 /* Find the ends of the shortest sequence of identical MX values */
419 while ( end_one->next && end_one->next->mx == mx
420 && end_two->next && end_two->next->mx == mx)
422 end_one = end_one->next;
423 end_two = end_two->next;
426 /* If there aren't any duplicates, there's no match. */
428 if (end_one == one) return FALSE;
430 /* For each host in the 'one' sequence, check that it appears in the 'two'
431 sequence, returning FALSE if not. */
436 for (hi = two; hi != end_two->next; hi = hi->next)
437 if (Ustrcmp(one->name, hi->name) == 0) break;
438 if (hi == end_two->next) return FALSE;
439 if (one == end_one) break;
443 /* All the hosts in the 'one' sequence were found in the 'two' sequence.
444 Ensure both are pointing at the last host, and carry on as for equality. */
455 /* True if both are NULL */
462 /*************************************************
463 * Compare header lines *
464 *************************************************/
466 /* This function is given two pointers to chains of header items, and it yields
467 TRUE if they are the same header texts in the same order.
470 one points to the first header list
471 two points to the second header list
473 Returns: TRUE if the lists refer to the same header set
477 same_headers(header_line *one, header_line *two)
479 for (;; one = one->next, two = two->next)
481 if (one == two) return TRUE; /* Includes the case where both NULL */
482 if (!one || !two) return FALSE;
483 if (Ustrcmp(one->text, two->text) != 0) return FALSE;
489 /*************************************************
490 * Compare string settings *
491 *************************************************/
493 /* This function is given two pointers to strings, and it returns
494 TRUE if they are the same pointer, or if the two strings are the same.
497 one points to the first string
498 two points to the second string
500 Returns: TRUE or FALSE
504 same_strings(uschar *one, uschar *two)
506 if (one == two) return TRUE; /* Includes the case where both NULL */
507 if (!one || !two) return FALSE;
508 return (Ustrcmp(one, two) == 0);
513 /*************************************************
514 * Compare uid/gid for addresses *
515 *************************************************/
517 /* This function is given a transport and two addresses. It yields TRUE if the
518 uid/gid/initgroups settings for the two addresses are going to be the same when
523 addr1 the first address
524 addr2 the second address
526 Returns: TRUE or FALSE
530 same_ugid(transport_instance *tp, address_item *addr1, address_item *addr2)
532 if ( !tp->uid_set && !tp->expand_uid
533 && !tp->deliver_as_creator
534 && ( testflag(addr1, af_uid_set) != testflag(addr2, af_gid_set)
535 || ( testflag(addr1, af_uid_set)
536 && ( addr1->uid != addr2->uid
537 || testflag(addr1, af_initgroups) != testflag(addr2, af_initgroups)
541 if ( !tp->gid_set && !tp->expand_gid
542 && ( testflag(addr1, af_gid_set) != testflag(addr2, af_gid_set)
543 || ( testflag(addr1, af_gid_set)
544 && addr1->gid != addr2->gid
554 /*************************************************
555 * Record that an address is complete *
556 *************************************************/
558 /* This function records that an address is complete. This is straightforward
559 for most addresses, where the unique address is just the full address with the
560 domain lower cased. For homonyms (addresses that are the same as one of their
561 ancestors) their are complications. Their unique addresses have \x\ prepended
562 (where x = 0, 1, 2...), so that de-duplication works correctly for siblings and
565 Exim used to record the unique addresses of homonyms as "complete". This,
566 however, fails when the pattern of redirection varies over time (e.g. if taking
567 unseen copies at only some times of day) because the prepended numbers may vary
568 from one delivery run to the next. This problem is solved by never recording
569 prepended unique addresses as complete. Instead, when a homonymic address has
570 actually been delivered via a transport, we record its basic unique address
571 followed by the name of the transport. This is checked in subsequent delivery
572 runs whenever an address is routed to a transport.
574 If the completed address is a top-level one (has no parent, which means it
575 cannot be homonymic) we also add the original address to the non-recipients
576 tree, so that it gets recorded in the spool file and therefore appears as
577 "done" in any spool listings. The original address may differ from the unique
578 address in the case of the domain.
580 Finally, this function scans the list of duplicates, marks as done any that
581 match this address, and calls child_done() for their ancestors.
584 addr address item that has been completed
585 now current time as a string
591 address_done(address_item *addr, uschar *now)
595 update_spool = TRUE; /* Ensure spool gets updated */
597 /* Top-level address */
601 tree_add_nonrecipient(addr->unique);
602 tree_add_nonrecipient(addr->address);
605 /* Homonymous child address */
607 else if (testflag(addr, af_homonym))
610 tree_add_nonrecipient(
611 string_sprintf("%s/%s", addr->unique + 3, addr->transport->name));
614 /* Non-homonymous child address */
616 else tree_add_nonrecipient(addr->unique);
618 /* Check the list of duplicate addresses and ensure they are now marked
621 for (dup = addr_duplicate; dup; dup = dup->next)
622 if (Ustrcmp(addr->unique, dup->unique) == 0)
624 tree_add_nonrecipient(dup->unique);
625 child_done(dup, now);
632 /*************************************************
633 * Decrease counts in parents and mark done *
634 *************************************************/
636 /* This function is called when an address is complete. If there is a parent
637 address, its count of children is decremented. If there are still other
638 children outstanding, the function exits. Otherwise, if the count has become
639 zero, address_done() is called to mark the parent and its duplicates complete.
640 Then loop for any earlier ancestors.
643 addr points to the completed address item
644 now the current time as a string, for writing to the message log
650 child_done(address_item *addr, uschar *now)
656 if ((addr->child_count -= 1) > 0) return; /* Incomplete parent */
657 address_done(addr, now);
659 /* Log the completion of all descendents only when there is no ancestor with
660 the same original address. */
662 for (aa = addr->parent; aa; aa = aa->parent)
663 if (Ustrcmp(aa->address, addr->address) == 0) break;
666 deliver_msglog("%s %s: children all complete\n", now, addr->address);
667 DEBUG(D_deliver) debug_printf("%s: children all complete\n", addr->address);
673 /*************************************************
674 * Delivery logging support functions *
675 *************************************************/
677 /* The LOGGING() checks in d_log_interface() are complicated for backwards
678 compatibility. When outgoing interface logging was originally added, it was
679 conditional on just incoming_interface (which is off by default). The
680 outgoing_interface option is on by default to preserve this behaviour, but
681 you can enable incoming_interface and disable outgoing_interface to get I=
682 fields on incoming lines only.
685 s The log line buffer
686 sizep Pointer to the buffer size
687 ptrp Pointer to current index into buffer
688 addr The address to be logged
690 Returns: New value for s
694 d_log_interface(uschar *s, int *sizep, int *ptrp)
696 if (LOGGING(incoming_interface) && LOGGING(outgoing_interface)
697 && sending_ip_address)
699 s = string_append(s, sizep, ptrp, 2, US" I=[", sending_ip_address);
700 s = LOGGING(outgoing_port)
701 ? string_append(s, sizep, ptrp, 2, US"]:",
702 string_sprintf("%d", sending_port))
703 : string_catn(s, sizep, ptrp, US"]", 1);
711 d_hostlog(uschar * s, int * sp, int * pp, address_item * addr)
713 host_item * h = addr->host_used;
715 s = string_append(s, sp, pp, 2, US" H=", h->name);
717 if (LOGGING(dnssec) && h->dnssec == DS_YES)
718 s = string_catn(s, sp, pp, US" DS", 3);
720 s = string_append(s, sp, pp, 3, US" [", h->address, US"]");
722 if (LOGGING(outgoing_port))
723 s = string_append(s, sp, pp, 2, US":", string_sprintf("%d", h->port));
726 if (LOGGING(proxy) && proxy_local_address)
728 s = string_append(s, sp, pp, 3, US" PRX=[", proxy_local_address, US"]");
729 if (LOGGING(outgoing_port))
730 s = string_append(s, sp, pp, 2, US":", string_sprintf("%d",
735 return d_log_interface(s, sp, pp);
744 d_tlslog(uschar * s, int * sizep, int * ptrp, address_item * addr)
746 if (LOGGING(tls_cipher) && addr->cipher)
747 s = string_append(s, sizep, ptrp, 2, US" X=", addr->cipher);
748 if (LOGGING(tls_certificate_verified) && addr->cipher)
749 s = string_append(s, sizep, ptrp, 2, US" CV=",
750 testflag(addr, af_cert_verified)
752 #ifdef EXPERIMENTAL_DANE
753 testflag(addr, af_dane_verified)
759 if (LOGGING(tls_peerdn) && addr->peerdn)
760 s = string_append(s, sizep, ptrp, 3, US" DN=\"",
761 string_printing(addr->peerdn), US"\"");
769 #ifndef DISABLE_EVENT
771 event_raise(uschar * action, const uschar * event, uschar * ev_data)
777 debug_printf("Event(%s): event_action=|%s| delivery_IP=%s\n",
779 action, deliver_host_address);
782 event_data = ev_data;
784 if (!(s = expand_string(action)) && *expand_string_message)
785 log_write(0, LOG_MAIN|LOG_PANIC,
786 "failed to expand event_action %s in %s: %s\n",
787 event, transport_name, expand_string_message);
789 event_name = event_data = NULL;
791 /* If the expansion returns anything but an empty string, flag for
792 the caller to modify his normal processing
797 debug_printf("Event(%s): event_action returned \"%s\"\n", event, s);
805 msg_event_raise(const uschar * event, const address_item * addr)
807 const uschar * save_domain = deliver_domain;
808 uschar * save_local = deliver_localpart;
809 const uschar * save_host = deliver_host;
810 const uschar * save_address = deliver_host_address;
811 const int save_port = deliver_host_port;
813 if (!addr->transport)
816 router_name = addr->router ? addr->router->name : NULL;
817 transport_name = addr->transport->name;
818 deliver_domain = addr->domain;
819 deliver_localpart = addr->local_part;
820 deliver_host = addr->host_used ? addr->host_used->name : NULL;
822 (void) event_raise(addr->transport->event_action, event,
824 || Ustrcmp(addr->transport->driver_name, "smtp") == 0
825 || Ustrcmp(addr->transport->driver_name, "lmtp") == 0
826 ? addr->message : NULL);
828 deliver_host_port = save_port;
829 deliver_host_address = save_address;
830 deliver_host = save_host;
831 deliver_localpart = save_local;
832 deliver_domain = save_domain;
833 router_name = transport_name = NULL;
835 #endif /*DISABLE_EVENT*/
839 /* If msg is NULL this is a delivery log and logchar is used. Otherwise
840 this is a nonstandard call; no two-character delivery flag is written
841 but sender-host and sender are prefixed and "msg" is inserted in the log line.
844 flags passed to log_write()
847 delivery_log(int flags, address_item * addr, int logchar, uschar * msg)
850 int size = 256; /* Used for a temporary, */
851 int ptr = 0; /* expanding buffer, for */
852 uschar *s; /* building log lines; */
853 void *reset_point; /* released afterwards. */
855 /* Log the delivery on the main log. We use an extensible string to build up
856 the log line, and reset the store afterwards. Remote deliveries should always
857 have a pointer to the host item that succeeded; local deliveries can have a
858 pointer to a single host item in their host list, for use by the transport. */
860 #ifndef DISABLE_EVENT
861 /* presume no successful remote delivery */
862 lookup_dnssec_authenticated = NULL;
865 s = reset_point = store_get(size);
867 log_address = string_log_address(addr, LOGGING(all_parents), TRUE);
869 s = string_append(s, &size, &ptr, 3, host_and_ident(TRUE), US" ", log_address);
873 s = string_append(s, &size, &ptr, 2, US"> ", log_address);
876 if (LOGGING(sender_on_delivery) || msg)
877 s = string_append(s, &size, &ptr, 3, US" F=<",
879 testflag(addr, af_utf8_downcvt)
880 ? string_address_utf8_to_alabel(sender_address, NULL)
887 s = string_append(s, &size, &ptr, 2, US" Q=", queue_name);
889 #ifdef EXPERIMENTAL_SRS
890 if(addr->prop.srs_sender)
891 s = string_append(s, &size, &ptr, 3, US" SRS=<", addr->prop.srs_sender, US">");
894 /* You might think that the return path must always be set for a successful
895 delivery; indeed, I did for some time, until this statement crashed. The case
896 when it is not set is for a delivery to /dev/null which is optimised by not
899 if (used_return_path && LOGGING(return_path_on_delivery))
900 s = string_append(s, &size, &ptr, 3, US" P=<", used_return_path, US">");
903 s = string_append(s, &size, &ptr, 2, US" ", msg);
905 /* For a delivery from a system filter, there may not be a router */
907 s = string_append(s, &size, &ptr, 2, US" R=", addr->router->name);
909 s = string_append(s, &size, &ptr, 2, US" T=", addr->transport->name);
911 if (LOGGING(delivery_size))
912 s = string_append(s, &size, &ptr, 2, US" S=",
913 string_sprintf("%d", transport_count));
917 if (addr->transport->info->local)
920 s = string_append(s, &size, &ptr, 2, US" H=", addr->host_list->name);
921 s = d_log_interface(s, &size, &ptr);
922 if (addr->shadow_message)
923 s = string_cat(s, &size, &ptr, addr->shadow_message);
926 /* Remote delivery */
932 s = d_hostlog(s, &size, &ptr, addr);
933 if (continue_sequence > 1)
934 s = string_catn(s, &size, &ptr, US"*", 1);
936 #ifndef DISABLE_EVENT
937 deliver_host_address = addr->host_used->address;
938 deliver_host_port = addr->host_used->port;
939 deliver_host = addr->host_used->name;
941 /* DNS lookup status */
942 lookup_dnssec_authenticated = addr->host_used->dnssec==DS_YES ? US"yes"
943 : addr->host_used->dnssec==DS_NO ? US"no"
949 s = d_tlslog(s, &size, &ptr, addr);
952 if (addr->authenticator)
954 s = string_append(s, &size, &ptr, 2, US" A=", addr->authenticator);
957 s = string_append(s, &size, &ptr, 2, US":", addr->auth_id);
958 if (LOGGING(smtp_mailauth) && addr->auth_sndr)
959 s = string_append(s, &size, &ptr, 2, US":", addr->auth_sndr);
964 if (addr->flags & af_prdr_used)
965 s = string_catn(s, &size, &ptr, US" PRDR", 5);
968 if (addr->flags & af_chunking_used)
969 s = string_catn(s, &size, &ptr, US" K", 2);
972 /* confirmation message (SMTP (host_used) and LMTP (driver_name)) */
974 if ( LOGGING(smtp_confirmation)
976 && (addr->host_used || Ustrcmp(addr->transport->driver_name, "lmtp") == 0)
980 unsigned lim = big_buffer_size < 1024 ? big_buffer_size : 1024;
981 uschar *p = big_buffer;
982 uschar *ss = addr->message;
984 for (i = 0; i < lim && ss[i] != 0; i++) /* limit logged amount */
986 if (ss[i] == '\"' || ss[i] == '\\') *p++ = '\\'; /* quote \ and " */
991 s = string_append(s, &size, &ptr, 2, US" C=", big_buffer);
994 /* Time on queue and actual time taken to deliver */
996 if (LOGGING(queue_time))
997 s = string_append(s, &size, &ptr, 2, US" QT=",
998 readconf_printtime( (int) ((long)time(NULL) - (long)received_time)) );
1000 if (LOGGING(deliver_time))
1001 s = string_append(s, &size, &ptr, 2, US" DT=",
1002 readconf_printtime(addr->more_errno));
1004 /* string_cat() always leaves room for the terminator. Release the
1005 store we used to build the line after writing it. */
1008 log_write(0, flags, "%s", s);
1010 #ifndef DISABLE_EVENT
1011 if (!msg) msg_event_raise(US"msg:delivery", addr);
1014 store_reset(reset_point);
1020 /*************************************************
1021 * Actions at the end of handling an address *
1022 *************************************************/
1024 /* This is a function for processing a single address when all that can be done
1025 with it has been done.
1028 addr points to the address block
1029 result the result of the delivery attempt
1030 logflags flags for log_write() (LOG_MAIN and/or LOG_PANIC)
1031 driver_type indicates which type of driver (transport, or router) was last
1032 to process the address
1033 logchar '=' or '-' for use when logging deliveries with => or ->
1039 post_process_one(address_item *addr, int result, int logflags, int driver_type,
1042 uschar *now = tod_stamp(tod_log);
1043 uschar *driver_kind = NULL;
1044 uschar *driver_name = NULL;
1045 uschar *log_address;
1047 int size = 256; /* Used for a temporary, */
1048 int ptr = 0; /* expanding buffer, for */
1049 uschar *s; /* building log lines; */
1050 void *reset_point; /* released afterwards. */
1052 DEBUG(D_deliver) debug_printf("post-process %s (%d)\n", addr->address, result);
1054 /* Set up driver kind and name for logging. Disable logging if the router or
1055 transport has disabled it. */
1057 if (driver_type == DTYPE_TRANSPORT)
1059 if (addr->transport)
1061 driver_name = addr->transport->name;
1062 driver_kind = US" transport";
1063 disable_logging = addr->transport->disable_logging;
1065 else driver_kind = US"transporting";
1067 else if (driver_type == DTYPE_ROUTER)
1071 driver_name = addr->router->name;
1072 driver_kind = US" router";
1073 disable_logging = addr->router->disable_logging;
1075 else driver_kind = US"routing";
1078 /* If there's an error message set, ensure that it contains only printing
1079 characters - it should, but occasionally things slip in and this at least
1080 stops the log format from getting wrecked. We also scan the message for an LDAP
1081 expansion item that has a password setting, and flatten the password. This is a
1082 fudge, but I don't know a cleaner way of doing this. (If the item is badly
1083 malformed, it won't ever have gone near LDAP.) */
1087 const uschar * s = string_printing(addr->message);
1089 /* deconst cast ok as string_printing known to have alloc'n'copied */
1090 addr->message = expand_hide_passwords(US s);
1093 /* If we used a transport that has one of the "return_output" options set, and
1094 if it did in fact generate some output, then for return_output we treat the
1095 message as failed if it was not already set that way, so that the output gets
1096 returned to the sender, provided there is a sender to send it to. For
1097 return_fail_output, do this only if the delivery failed. Otherwise we just
1098 unlink the file, and remove the name so that if the delivery failed, we don't
1099 try to send back an empty or unwanted file. The log_output options operate only
1100 on a non-empty file.
1102 In any case, we close the message file, because we cannot afford to leave a
1103 file-descriptor for one address while processing (maybe very many) others. */
1105 if (addr->return_file >= 0 && addr->return_filename)
1107 BOOL return_output = FALSE;
1108 struct stat statbuf;
1109 (void)EXIMfsync(addr->return_file);
1111 /* If there is no output, do nothing. */
1113 if (fstat(addr->return_file, &statbuf) == 0 && statbuf.st_size > 0)
1115 transport_instance *tb = addr->transport;
1117 /* Handle logging options */
1120 || result == FAIL && tb->log_fail_output
1121 || result == DEFER && tb->log_defer_output
1125 FILE *f = Ufopen(addr->return_filename, "rb");
1127 log_write(0, LOG_MAIN|LOG_PANIC, "failed to open %s to log output "
1128 "from %s transport: %s", addr->return_filename, tb->name,
1131 if ((s = US Ufgets(big_buffer, big_buffer_size, f)))
1133 uschar *p = big_buffer + Ustrlen(big_buffer);
1135 while (p > big_buffer && isspace(p[-1])) p--;
1137 sp = string_printing(big_buffer);
1138 log_write(0, LOG_MAIN, "<%s>: %s transport output: %s",
1139 addr->address, tb->name, sp);
1144 /* Handle returning options, but only if there is an address to return
1147 if (sender_address[0] != 0 || addr->prop.errors_address)
1148 if (tb->return_output)
1150 addr->transport_return = result = FAIL;
1151 if (addr->basic_errno == 0 && !addr->message)
1152 addr->message = US"return message generated";
1153 return_output = TRUE;
1156 if (tb->return_fail_output && result == FAIL) return_output = TRUE;
1159 /* Get rid of the file unless it might be returned, but close it in
1164 Uunlink(addr->return_filename);
1165 addr->return_filename = NULL;
1166 addr->return_file = -1;
1169 (void)close(addr->return_file);
1172 /* The success case happens only after delivery by a transport. */
1176 addr->next = addr_succeed;
1177 addr_succeed = addr;
1179 /* Call address_done() to ensure that we don't deliver to this address again,
1180 and write appropriate things to the message log. If it is a child address, we
1181 call child_done() to scan the ancestors and mark them complete if this is the
1182 last child to complete. */
1184 address_done(addr, now);
1185 DEBUG(D_deliver) debug_printf("%s delivered\n", addr->address);
1188 deliver_msglog("%s %s: %s%s succeeded\n", now, addr->address,
1189 driver_name, driver_kind);
1192 deliver_msglog("%s %s <%s>: %s%s succeeded\n", now, addr->address,
1193 addr->parent->address, driver_name, driver_kind);
1194 child_done(addr, now);
1197 /* Certificates for logging (via events) */
1199 tls_out.ourcert = addr->ourcert;
1200 addr->ourcert = NULL;
1201 tls_out.peercert = addr->peercert;
1202 addr->peercert = NULL;
1204 tls_out.cipher = addr->cipher;
1205 tls_out.peerdn = addr->peerdn;
1206 tls_out.ocsp = addr->ocsp;
1207 # ifdef EXPERIMENTAL_DANE
1208 tls_out.dane_verified = testflag(addr, af_dane_verified);
1212 delivery_log(LOG_MAIN, addr, logchar, NULL);
1215 tls_free_cert(&tls_out.ourcert);
1216 tls_free_cert(&tls_out.peercert);
1217 tls_out.cipher = NULL;
1218 tls_out.peerdn = NULL;
1219 tls_out.ocsp = OCSP_NOT_REQ;
1220 # ifdef EXPERIMENTAL_DANE
1221 tls_out.dane_verified = FALSE;
1227 /* Soft failure, or local delivery process failed; freezing may be
1230 else if (result == DEFER || result == PANIC)
1232 if (result == PANIC) logflags |= LOG_PANIC;
1234 /* This puts them on the chain in reverse order. Do not change this, because
1235 the code for handling retries assumes that the one with the retry
1236 information is last. */
1238 addr->next = addr_defer;
1241 /* The only currently implemented special action is to freeze the
1242 message. Logging of this is done later, just before the -H file is
1245 if (addr->special_action == SPECIAL_FREEZE)
1247 deliver_freeze = TRUE;
1248 deliver_frozen_at = time(NULL);
1249 update_spool = TRUE;
1252 /* If doing a 2-stage queue run, we skip writing to either the message
1253 log or the main log for SMTP defers. */
1255 if (!queue_2stage || addr->basic_errno != 0)
1259 /* For errors of the type "retry time not reached" (also remotes skipped
1260 on queue run), logging is controlled by L_retry_defer. Note that this kind
1261 of error number is negative, and all the retry ones are less than any
1264 unsigned int use_log_selector = addr->basic_errno <= ERRNO_RETRY_BASE
1265 ? L_retry_defer : 0;
1267 /* Build up the line that is used for both the message log and the main
1270 s = reset_point = store_get(size);
1272 /* Create the address string for logging. Must not do this earlier, because
1273 an OK result may be changed to FAIL when a pipe returns text. */
1275 log_address = string_log_address(addr, LOGGING(all_parents), result == OK);
1277 s = string_cat(s, &size, &ptr, log_address);
1280 s = string_append(s, &size, &ptr, 2, US" Q=", queue_name);
1282 /* Either driver_name contains something and driver_kind contains
1283 " router" or " transport" (note the leading space), or driver_name is
1284 a null string and driver_kind contains "routing" without the leading
1285 space, if all routing has been deferred. When a domain has been held,
1286 so nothing has been done at all, both variables contain null strings. */
1290 if (driver_kind[1] == 't' && addr->router)
1291 s = string_append(s, &size, &ptr, 2, US" R=", addr->router->name);
1293 ss[1] = toupper(driver_kind[1]);
1294 s = string_append(s, &size, &ptr, 2, ss, driver_name);
1296 else if (driver_kind)
1297 s = string_append(s, &size, &ptr, 2, US" ", driver_kind);
1299 sprintf(CS ss, " defer (%d)", addr->basic_errno);
1300 s = string_cat(s, &size, &ptr, ss);
1302 if (addr->basic_errno > 0)
1303 s = string_append(s, &size, &ptr, 2, US": ",
1304 US strerror(addr->basic_errno));
1306 if (addr->host_used)
1308 s = string_append(s, &size, &ptr, 5,
1309 US" H=", addr->host_used->name,
1310 US" [", addr->host_used->address, US"]");
1311 if (LOGGING(outgoing_port))
1313 int port = addr->host_used->port;
1314 s = string_append(s, &size, &ptr, 2,
1315 US":", port == PORT_NONE ? US"25" : string_sprintf("%d", port));
1320 s = string_append(s, &size, &ptr, 2, US": ", addr->message);
1324 /* Log the deferment in the message log, but don't clutter it
1325 up with retry-time defers after the first delivery attempt. */
1327 if (deliver_firsttime || addr->basic_errno > ERRNO_RETRY_BASE)
1328 deliver_msglog("%s %s\n", now, s);
1330 /* Write the main log and reset the store */
1332 log_write(use_log_selector, logflags, "== %s", s);
1333 store_reset(reset_point);
1338 /* Hard failure. If there is an address to which an error message can be sent,
1339 put this address on the failed list. If not, put it on the deferred list and
1340 freeze the mail message for human attention. The latter action can also be
1341 explicitly requested by a router or transport. */
1345 /* If this is a delivery error, or a message for which no replies are
1346 wanted, and the message's age is greater than ignore_bounce_errors_after,
1347 force the af_ignore_error flag. This will cause the address to be discarded
1348 later (with a log entry). */
1350 if (sender_address[0] == 0 && message_age >= ignore_bounce_errors_after)
1351 setflag(addr, af_ignore_error);
1353 /* Freeze the message if requested, or if this is a bounce message (or other
1354 message with null sender) and this address does not have its own errors
1355 address. However, don't freeze if errors are being ignored. The actual code
1356 to ignore occurs later, instead of sending a message. Logging of freezing
1357 occurs later, just before writing the -H file. */
1359 if ( !testflag(addr, af_ignore_error)
1360 && ( addr->special_action == SPECIAL_FREEZE
1361 || (sender_address[0] == 0 && !addr->prop.errors_address)
1364 frozen_info = addr->special_action == SPECIAL_FREEZE
1366 : sender_local && !local_error_message
1367 ? US" (message created with -f <>)"
1368 : US" (delivery error message)";
1369 deliver_freeze = TRUE;
1370 deliver_frozen_at = time(NULL);
1371 update_spool = TRUE;
1373 /* The address is put on the defer rather than the failed queue, because
1374 the message is being retained. */
1376 addr->next = addr_defer;
1380 /* Don't put the address on the nonrecipients tree yet; wait until an
1381 error message has been successfully sent. */
1385 addr->next = addr_failed;
1389 /* Build up the log line for the message and main logs */
1391 s = reset_point = store_get(size);
1393 /* Create the address string for logging. Must not do this earlier, because
1394 an OK result may be changed to FAIL when a pipe returns text. */
1396 log_address = string_log_address(addr, LOGGING(all_parents), result == OK);
1398 s = string_cat(s, &size, &ptr, log_address);
1400 if (LOGGING(sender_on_delivery))
1401 s = string_append(s, &size, &ptr, 3, US" F=<", sender_address, US">");
1404 s = string_append(s, &size, &ptr, 2, US" Q=", queue_name);
1406 /* Return path may not be set if no delivery actually happened */
1408 if (used_return_path && LOGGING(return_path_on_delivery))
1409 s = string_append(s, &size, &ptr, 3, US" P=<", used_return_path, US">");
1412 s = string_append(s, &size, &ptr, 2, US" R=", addr->router->name);
1413 if (addr->transport)
1414 s = string_append(s, &size, &ptr, 2, US" T=", addr->transport->name);
1416 if (addr->host_used)
1417 s = d_hostlog(s, &size, &ptr, addr);
1420 s = d_tlslog(s, &size, &ptr, addr);
1423 if (addr->basic_errno > 0)
1424 s = string_append(s, &size, &ptr, 2, US": ",
1425 US strerror(addr->basic_errno));
1428 s = string_append(s, &size, &ptr, 2, US": ", addr->message);
1432 /* Do the logging. For the message log, "routing failed" for those cases,
1433 just to make it clearer. */
1436 deliver_msglog("%s %s\n", now, s);
1438 deliver_msglog("%s %s failed for %s\n", now, driver_kind, s);
1440 log_write(0, LOG_MAIN, "** %s", s);
1442 #ifndef DISABLE_EVENT
1443 msg_event_raise(US"msg:fail:delivery", addr);
1446 store_reset(reset_point);
1449 /* Ensure logging is turned on again in all cases */
1451 disable_logging = FALSE;
1457 /*************************************************
1458 * Address-independent error *
1459 *************************************************/
1461 /* This function is called when there's an error that is not dependent on a
1462 particular address, such as an expansion string failure. It puts the error into
1463 all the addresses in a batch, logs the incident on the main and panic logs, and
1464 clears the expansions. It is mostly called from local_deliver(), but can be
1465 called for a remote delivery via findugid().
1468 logit TRUE if (MAIN+PANIC) logging required
1469 addr the first of the chain of addresses
1471 format format string for error message, or NULL if already set in addr
1472 ... arguments for the format
1478 common_error(BOOL logit, address_item *addr, int code, uschar *format, ...)
1480 address_item *addr2;
1481 addr->basic_errno = code;
1487 va_start(ap, format);
1488 if (!string_vformat(buffer, sizeof(buffer), CS format, ap))
1489 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
1490 "common_error expansion was longer than " SIZE_T_FMT, sizeof(buffer));
1492 addr->message = string_copy(buffer);
1495 for (addr2 = addr->next; addr2; addr2 = addr2->next)
1497 addr2->basic_errno = code;
1498 addr2->message = addr->message;
1501 if (logit) log_write(0, LOG_MAIN|LOG_PANIC, "%s", addr->message);
1502 deliver_set_expansions(NULL);
1508 /*************************************************
1509 * Check a "never users" list *
1510 *************************************************/
1512 /* This function is called to check whether a uid is on one of the two "never
1516 uid the uid to be checked
1517 nusers the list to be scanned; the first item in the list is the count
1519 Returns: TRUE if the uid is on the list
1523 check_never_users(uid_t uid, uid_t *nusers)
1526 if (!nusers) return FALSE;
1527 for (i = 1; i <= (int)(nusers[0]); i++) if (nusers[i] == uid) return TRUE;
1533 /*************************************************
1534 * Find uid and gid for a transport *
1535 *************************************************/
1537 /* This function is called for both local and remote deliveries, to find the
1538 uid/gid under which to run the delivery. The values are taken preferentially
1539 from the transport (either explicit or deliver_as_creator), then from the
1540 address (i.e. the router), and if nothing is set, the exim uid/gid are used. If
1541 the resulting uid is on the "never_users" or the "fixed_never_users" list, a
1542 panic error is logged, and the function fails (which normally leads to delivery
1546 addr the address (possibly a chain)
1548 uidp pointer to uid field
1549 gidp pointer to gid field
1550 igfp pointer to the use_initgroups field
1552 Returns: FALSE if failed - error has been set in address(es)
1556 findugid(address_item *addr, transport_instance *tp, uid_t *uidp, gid_t *gidp,
1560 BOOL gid_set = FALSE;
1562 /* Default initgroups flag comes from the transport */
1564 *igfp = tp->initgroups;
1566 /* First see if there's a gid on the transport, either fixed or expandable.
1567 The expanding function always logs failure itself. */
1574 else if (tp->expand_gid)
1576 if (!route_find_expanded_group(tp->expand_gid, tp->name, US"transport", gidp,
1579 common_error(FALSE, addr, ERRNO_GIDFAIL, NULL);
1585 /* If the transport did not set a group, see if the router did. */
1587 if (!gid_set && testflag(addr, af_gid_set))
1593 /* Pick up a uid from the transport if one is set. */
1595 if (tp->uid_set) *uidp = tp->uid;
1597 /* Otherwise, try for an expandable uid field. If it ends up as a numeric id,
1598 it does not provide a passwd value from which a gid can be taken. */
1600 else if (tp->expand_uid)
1603 if (!route_find_expanded_user(tp->expand_uid, tp->name, US"transport", &pw,
1604 uidp, &(addr->message)))
1606 common_error(FALSE, addr, ERRNO_UIDFAIL, NULL);
1616 /* If the transport doesn't set the uid, test the deliver_as_creator flag. */
1618 else if (tp->deliver_as_creator)
1620 *uidp = originator_uid;
1623 *gidp = originator_gid;
1628 /* Otherwise see if the address specifies the uid and if so, take it and its
1631 else if (testflag(addr, af_uid_set))
1634 *igfp = testflag(addr, af_initgroups);
1637 /* Nothing has specified the uid - default to the Exim user, and group if the
1650 /* If no gid is set, it is a disaster. We default to the Exim gid only if
1651 defaulting to the Exim uid. In other words, if the configuration has specified
1652 a uid, it must also provide a gid. */
1656 common_error(TRUE, addr, ERRNO_GIDFAIL, US"User set without group for "
1657 "%s transport", tp->name);
1661 /* Check that the uid is not on the lists of banned uids that may not be used
1662 for delivery processes. */
1664 nuname = check_never_users(*uidp, never_users)
1666 : check_never_users(*uidp, fixed_never_users)
1667 ? US"fixed_never_users"
1671 common_error(TRUE, addr, ERRNO_UIDFAIL, US"User %ld set for %s transport "
1672 "is on the %s list", (long int)(*uidp), tp->name, nuname);
1684 /*************************************************
1685 * Check the size of a message for a transport *
1686 *************************************************/
1688 /* Checks that the message isn't too big for the selected transport.
1689 This is called only when it is known that the limit is set.
1693 addr the (first) address being delivered
1696 DEFER expansion failed or did not yield an integer
1697 FAIL message too big
1701 check_message_size(transport_instance *tp, address_item *addr)
1706 deliver_set_expansions(addr);
1707 size_limit = expand_string_integer(tp->message_size_limit, TRUE);
1708 deliver_set_expansions(NULL);
1710 if (expand_string_message)
1713 addr->message = size_limit == -1
1714 ? string_sprintf("failed to expand message_size_limit "
1715 "in %s transport: %s", tp->name, expand_string_message)
1716 : string_sprintf("invalid message_size_limit "
1717 "in %s transport: %s", tp->name, expand_string_message);
1719 else if (size_limit > 0 && message_size > size_limit)
1723 string_sprintf("message is too big (transport limit = %d)",
1732 /*************************************************
1733 * Transport-time check for a previous delivery *
1734 *************************************************/
1736 /* Check that this base address hasn't previously been delivered to its routed
1737 transport. If it has been delivered, mark it done. The check is necessary at
1738 delivery time in order to handle homonymic addresses correctly in cases where
1739 the pattern of redirection changes between delivery attempts (so the unique
1740 fields change). Non-homonymic previous delivery is detected earlier, at routing
1741 time (which saves unnecessary routing).
1744 addr the address item
1745 testing TRUE if testing wanted only, without side effects
1747 Returns: TRUE if previously delivered by the transport
1751 previously_transported(address_item *addr, BOOL testing)
1753 (void)string_format(big_buffer, big_buffer_size, "%s/%s",
1754 addr->unique + (testflag(addr, af_homonym)? 3:0), addr->transport->name);
1756 if (tree_search(tree_nonrecipients, big_buffer) != 0)
1758 DEBUG(D_deliver|D_route|D_transport)
1759 debug_printf("%s was previously delivered (%s transport): discarded\n",
1760 addr->address, addr->transport->name);
1761 if (!testing) child_done(addr, tod_stamp(tod_log));
1770 /******************************************************
1771 * Check for a given header in a header string *
1772 ******************************************************/
1774 /* This function is used when generating quota warnings. The configuration may
1775 specify any header lines it likes in quota_warn_message. If certain of them are
1776 missing, defaults are inserted, so we need to be able to test for the presence
1780 hdr the required header name
1781 hstring the header string
1783 Returns: TRUE the header is in the string
1784 FALSE the header is not in the string
1788 contains_header(uschar *hdr, uschar *hstring)
1790 int len = Ustrlen(hdr);
1791 uschar *p = hstring;
1794 if (strncmpic(p, hdr, len) == 0)
1797 while (*p == ' ' || *p == '\t') p++;
1798 if (*p == ':') return TRUE;
1800 while (*p != 0 && *p != '\n') p++;
1801 if (*p == '\n') p++;
1809 /*************************************************
1810 * Perform a local delivery *
1811 *************************************************/
1813 /* Each local delivery is performed in a separate process which sets its
1814 uid and gid as specified. This is a safer way than simply changing and
1815 restoring using seteuid(); there is a body of opinion that seteuid() cannot be
1816 used safely. From release 4, Exim no longer makes any use of it. Besides, not
1817 all systems have seteuid().
1819 If the uid/gid are specified in the transport_instance, they are used; the
1820 transport initialization must ensure that either both or neither are set.
1821 Otherwise, the values associated with the address are used. If neither are set,
1822 it is a configuration error.
1824 The transport or the address may specify a home directory (transport over-
1825 rides), and if they do, this is set as $home. If neither have set a working
1826 directory, this value is used for that as well. Otherwise $home is left unset
1827 and the cwd is set to "/" - a directory that should be accessible to all users.
1829 Using a separate process makes it more complicated to get error information
1830 back. We use a pipe to pass the return code and also an error code and error
1831 text string back to the parent process.
1834 addr points to an address block for this delivery; for "normal" local
1835 deliveries this is the only address to be delivered, but for
1836 pseudo-remote deliveries (e.g. by batch SMTP to a file or pipe)
1837 a number of addresses can be handled simultaneously, and in this
1838 case addr will point to a chain of addresses with the same
1841 shadowing TRUE if running a shadow transport; this causes output from pipes
1848 deliver_local(address_item *addr, BOOL shadowing)
1850 BOOL use_initgroups;
1853 int status, len, rc;
1856 uschar *working_directory;
1857 address_item *addr2;
1858 transport_instance *tp = addr->transport;
1860 /* Set up the return path from the errors or sender address. If the transport
1861 has its own return path setting, expand it and replace the existing value. */
1863 if(addr->prop.errors_address)
1864 return_path = addr->prop.errors_address;
1865 #ifdef EXPERIMENTAL_SRS
1866 else if (addr->prop.srs_sender)
1867 return_path = addr->prop.srs_sender;
1870 return_path = sender_address;
1872 if (tp->return_path)
1874 uschar *new_return_path = expand_string(tp->return_path);
1875 if (!new_return_path)
1877 if (!expand_string_forcedfail)
1879 common_error(TRUE, addr, ERRNO_EXPANDFAIL,
1880 US"Failed to expand return path \"%s\" in %s transport: %s",
1881 tp->return_path, tp->name, expand_string_message);
1885 else return_path = new_return_path;
1888 /* For local deliveries, one at a time, the value used for logging can just be
1889 set directly, once and for all. */
1891 used_return_path = return_path;
1893 /* Sort out the uid, gid, and initgroups flag. If an error occurs, the message
1894 gets put into the address(es), and the expansions are unset, so we can just
1897 if (!findugid(addr, tp, &uid, &gid, &use_initgroups)) return;
1899 /* See if either the transport or the address specifies a home directory. A
1900 home directory set in the address may already be expanded; a flag is set to
1901 indicate that. In other cases we must expand it. */
1903 if ( (deliver_home = tp->home_dir) /* Set in transport, or */
1904 || ( (deliver_home = addr->home_dir) /* Set in address and */
1905 && !testflag(addr, af_home_expanded) /* not expanded */
1908 uschar *rawhome = deliver_home;
1909 deliver_home = NULL; /* in case it contains $home */
1910 if (!(deliver_home = expand_string(rawhome)))
1912 common_error(TRUE, addr, ERRNO_EXPANDFAIL, US"home directory \"%s\" failed "
1913 "to expand for %s transport: %s", rawhome, tp->name,
1914 expand_string_message);
1917 if (*deliver_home != '/')
1919 common_error(TRUE, addr, ERRNO_NOTABSOLUTE, US"home directory path \"%s\" "
1920 "is not absolute for %s transport", deliver_home, tp->name);
1925 /* See if either the transport or the address specifies a current directory,
1926 and if so, expand it. If nothing is set, use the home directory, unless it is
1927 also unset in which case use "/", which is assumed to be a directory to which
1928 all users have access. It is necessary to be in a visible directory for some
1929 operating systems when running pipes, as some commands (e.g. "rm" under Solaris
1930 2.5) require this. */
1932 working_directory = tp->current_dir ? tp->current_dir : addr->current_dir;
1933 if (working_directory)
1935 uschar *raw = working_directory;
1936 if (!(working_directory = expand_string(raw)))
1938 common_error(TRUE, addr, ERRNO_EXPANDFAIL, US"current directory \"%s\" "
1939 "failed to expand for %s transport: %s", raw, tp->name,
1940 expand_string_message);
1943 if (*working_directory != '/')
1945 common_error(TRUE, addr, ERRNO_NOTABSOLUTE, US"current directory path "
1946 "\"%s\" is not absolute for %s transport", working_directory, tp->name);
1950 else working_directory = deliver_home ? deliver_home : US"/";
1952 /* If one of the return_output flags is set on the transport, create and open a
1953 file in the message log directory for the transport to write its output onto.
1954 This is mainly used by pipe transports. The file needs to be unique to the
1955 address. This feature is not available for shadow transports. */
1958 && ( tp->return_output || tp->return_fail_output
1959 || tp->log_output || tp->log_fail_output || tp->log_defer_output
1964 addr->return_filename =
1965 spool_fname(US"msglog", message_subdir, message_id,
1966 string_sprintf("-%d-%d", getpid(), return_count++));
1968 if ((addr->return_file = open_msglog_file(addr->return_filename, 0400, &error)) < 0)
1970 common_error(TRUE, addr, errno, US"Unable to %s file for %s transport "
1971 "to return message: %s", error, tp->name, strerror(errno));
1976 /* Create the pipe for inter-process communication. */
1980 common_error(TRUE, addr, ERRNO_PIPEFAIL, US"Creation of pipe failed: %s",
1985 /* Now fork the process to do the real work in the subprocess, but first
1986 ensure that all cached resources are freed so that the subprocess starts with
1987 a clean slate and doesn't interfere with the parent process. */
1991 if ((pid = fork()) == 0)
1993 BOOL replicate = TRUE;
1995 /* Prevent core dumps, as we don't want them in users' home directories.
1996 HP-UX doesn't have RLIMIT_CORE; I don't know how to do this in that
1997 system. Some experimental/developing systems (e.g. GNU/Hurd) may define
1998 RLIMIT_CORE but not support it in setrlimit(). For such systems, do not
1999 complain if the error is "not supported".
2001 There are two scenarios where changing the max limit has an effect. In one,
2002 the user is using a .forward and invoking a command of their choice via pipe;
2003 for these, we do need the max limit to be 0 unless the admin chooses to
2004 permit an increased limit. In the other, the command is invoked directly by
2005 the transport and is under administrator control, thus being able to raise
2006 the limit aids in debugging. So there's no general always-right answer.
2008 Thus we inhibit core-dumps completely but let individual transports, while
2009 still root, re-raise the limits back up to aid debugging. We make the
2010 default be no core-dumps -- few enough people can use core dumps in
2011 diagnosis that it's reasonable to make them something that has to be explicitly requested.
2018 if (setrlimit(RLIMIT_CORE, &rl) < 0)
2020 # ifdef SETRLIMIT_NOT_SUPPORTED
2021 if (errno != ENOSYS && errno != ENOTSUP)
2023 log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_CORE) failed: %s",
2028 /* Reset the random number generator, so different processes don't all
2029 have the same sequence. */
2033 /* If the transport has a setup entry, call this first, while still
2034 privileged. (Appendfile uses this to expand quota, for example, while
2035 able to read private files.) */
2037 if (addr->transport->setup)
2038 switch((addr->transport->setup)(addr->transport, addr, NULL, uid, gid,
2042 addr->transport_return = DEFER;
2046 addr->transport_return = PANIC;
2050 /* Ignore SIGINT and SIGTERM during delivery. Also ignore SIGUSR1, as
2051 when the process becomes unprivileged, it won't be able to write to the
2052 process log. SIGHUP is ignored throughout exim, except when it is being
2055 signal(SIGINT, SIG_IGN);
2056 signal(SIGTERM, SIG_IGN);
2057 signal(SIGUSR1, SIG_IGN);
2059 /* Close the unwanted half of the pipe, and set close-on-exec for the other
2060 half - for transports that exec things (e.g. pipe). Then set the required
2063 (void)close(pfd[pipe_read]);
2064 (void)fcntl(pfd[pipe_write], F_SETFD, fcntl(pfd[pipe_write], F_GETFD) |
2066 exim_setugid(uid, gid, use_initgroups,
2067 string_sprintf("local delivery to %s <%s> transport=%s", addr->local_part,
2068 addr->address, addr->transport->name));
2072 address_item *batched;
2073 debug_printf(" home=%s current=%s\n", deliver_home, working_directory);
2074 for (batched = addr->next; batched; batched = batched->next)
2075 debug_printf("additional batched address: %s\n", batched->address);
2078 /* Set an appropriate working directory. */
2080 if (Uchdir(working_directory) < 0)
2082 addr->transport_return = DEFER;
2083 addr->basic_errno = errno;
2084 addr->message = string_sprintf("failed to chdir to %s", working_directory);
2087 /* If successful, call the transport */
2092 set_process_info("delivering %s to %s using %s", message_id,
2093 addr->local_part, addr->transport->name);
2095 /* Setting this global in the subprocess means we need never clear it */
2096 transport_name = addr->transport->name;
2098 /* If a transport filter has been specified, set up its argument list.
2099 Any errors will get put into the address, and FALSE yielded. */
2101 if (addr->transport->filter_command)
2103 ok = transport_set_up_command(&transport_filter_argv,
2104 addr->transport->filter_command,
2105 TRUE, PANIC, addr, US"transport filter", NULL);
2106 transport_filter_timeout = addr->transport->filter_timeout;
2108 else transport_filter_argv = NULL;
2112 debug_print_string(addr->transport->debug_string);
2113 replicate = !(addr->transport->info->code)(addr->transport, addr);
2117 /* Pass the results back down the pipe. If necessary, first replicate the
2118 status in the top address to the others in the batch. The label is the
2119 subject of a goto when a call to the transport's setup function fails. We
2120 pass the pointer to the transport back in case it got changed as a result of
2121 file_format in appendfile. */
2125 if (replicate) replicate_status(addr);
2126 for (addr2 = addr; addr2; addr2 = addr2->next)
2129 int local_part_length = Ustrlen(addr2->local_part);
2133 if( (ret = write(pfd[pipe_write], &addr2->transport_return, sizeof(int))) != sizeof(int)
2134 || (ret = write(pfd[pipe_write], &transport_count, sizeof(transport_count))) != sizeof(transport_count)
2135 || (ret = write(pfd[pipe_write], &addr2->flags, sizeof(addr2->flags))) != sizeof(addr2->flags)
2136 || (ret = write(pfd[pipe_write], &addr2->basic_errno, sizeof(int))) != sizeof(int)
2137 || (ret = write(pfd[pipe_write], &addr2->more_errno, sizeof(int))) != sizeof(int)
2138 || (ret = write(pfd[pipe_write], &addr2->special_action, sizeof(int))) != sizeof(int)
2139 || (ret = write(pfd[pipe_write], &addr2->transport,
2140 sizeof(transport_instance *))) != sizeof(transport_instance *)
2142 /* For a file delivery, pass back the local part, in case the original
2143 was only part of the final delivery path. This gives more complete
2146 || (testflag(addr2, af_file)
2147 && ( (ret = write(pfd[pipe_write], &local_part_length, sizeof(int))) != sizeof(int)
2148 || (ret = write(pfd[pipe_write], addr2->local_part, local_part_length)) != local_part_length
2152 log_write(0, LOG_MAIN|LOG_PANIC, "Failed writing transport results to pipe: %s\n",
2153 ret == -1 ? strerror(errno) : "short write");
2155 /* Now any messages */
2157 for (i = 0, s = addr2->message; i < 2; i++, s = addr2->user_message)
2159 int message_length = s ? Ustrlen(s) + 1 : 0;
2160 if( (ret = write(pfd[pipe_write], &message_length, sizeof(int))) != sizeof(int)
2161 || message_length > 0 && (ret = write(pfd[pipe_write], s, message_length)) != message_length
2163 log_write(0, LOG_MAIN|LOG_PANIC, "Failed writing transport results to pipe: %s\n",
2164 ret == -1 ? strerror(errno) : "short write");
2168 /* OK, this process is now done. Free any cached resources that it opened,
2169 and close the pipe we were writing down before exiting. */
2171 (void)close(pfd[pipe_write]);
2176 /* Back in the main process: panic if the fork did not succeed. This seems
2177 better than returning an error - if forking is failing it is probably best
2178 not to try other deliveries for this message. */
2181 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Fork failed for local delivery to %s",
2184 /* Read the pipe to get the delivery status codes and error messages. Our copy
2185 of the writing end must be closed first, as otherwise read() won't return zero
2186 on an empty pipe. We check that a status exists for each address before
2187 overwriting the address structure. If data is missing, the default DEFER status
2188 will remain. Afterwards, close the reading end. */
2190 (void)close(pfd[pipe_write]);
2192 for (addr2 = addr; addr2; addr2 = addr2->next)
2194 len = read(pfd[pipe_read], &status, sizeof(int));
2200 addr2->transport_return = status;
2201 len = read(pfd[pipe_read], &transport_count,
2202 sizeof(transport_count));
2203 len = read(pfd[pipe_read], &addr2->flags, sizeof(addr2->flags));
2204 len = read(pfd[pipe_read], &addr2->basic_errno, sizeof(int));
2205 len = read(pfd[pipe_read], &addr2->more_errno, sizeof(int));
2206 len = read(pfd[pipe_read], &addr2->special_action, sizeof(int));
2207 len = read(pfd[pipe_read], &addr2->transport,
2208 sizeof(transport_instance *));
2210 if (testflag(addr2, af_file))
2212 int local_part_length;
2213 len = read(pfd[pipe_read], &local_part_length, sizeof(int));
2214 len = read(pfd[pipe_read], big_buffer, local_part_length);
2215 big_buffer[local_part_length] = 0;
2216 addr2->local_part = string_copy(big_buffer);
2219 for (i = 0, sptr = &addr2->message; i < 2; i++, sptr = &addr2->user_message)
2222 len = read(pfd[pipe_read], &message_length, sizeof(int));
2223 if (message_length > 0)
2225 len = read(pfd[pipe_read], big_buffer, message_length);
2226 big_buffer[big_buffer_size-1] = '\0'; /* guard byte */
2227 if (len > 0) *sptr = string_copy(big_buffer);
2234 log_write(0, LOG_MAIN|LOG_PANIC, "failed to read delivery status for %s "
2235 "from delivery subprocess", addr2->unique);
2240 (void)close(pfd[pipe_read]);
2242 /* Unless shadowing, write all successful addresses immediately to the journal
2243 file, to ensure they are recorded asap. For homonymic addresses, use the base
2244 address plus the transport name. Failure to write the journal is panic-worthy,
2245 but don't stop, as it may prove possible subsequently to update the spool file
2246 in order to record the delivery. */
2250 for (addr2 = addr; addr2; addr2 = addr2->next)
2251 if (addr2->transport_return == OK)
2253 if (testflag(addr2, af_homonym))
2254 sprintf(CS big_buffer, "%.500s/%s\n", addr2->unique + 3, tp->name);
2256 sprintf(CS big_buffer, "%.500s\n", addr2->unique);
2258 /* In the test harness, wait just a bit to let the subprocess finish off
2259 any debug output etc first. */
2261 if (running_in_test_harness) millisleep(300);
2263 DEBUG(D_deliver) debug_printf("journalling %s", big_buffer);
2264 len = Ustrlen(big_buffer);
2265 if (write(journal_fd, big_buffer, len) != len)
2266 log_write(0, LOG_MAIN|LOG_PANIC, "failed to update journal for %s: %s",
2267 big_buffer, strerror(errno));
2270 /* Ensure the journal file is pushed out to disk. */
2272 if (EXIMfsync(journal_fd) < 0)
2273 log_write(0, LOG_MAIN|LOG_PANIC, "failed to fsync journal: %s",
2277 /* Wait for the process to finish. If it terminates with a non-zero code,
2278 freeze the message (except for SIGTERM, SIGKILL and SIGQUIT), but leave the
2279 status values of all the addresses as they are. Take care to handle the case
2280 when the subprocess doesn't seem to exist. This has been seen on one system
2281 when Exim was called from an MUA that set SIGCHLD to SIG_IGN. When that
2282 happens, wait() doesn't recognize the termination of child processes. Exim now
2283 resets SIGCHLD to SIG_DFL, but this code should still be robust. */
2285 while ((rc = wait(&status)) != pid)
2286 if (rc < 0 && errno == ECHILD) /* Process has vanished */
2288 log_write(0, LOG_MAIN, "%s transport process vanished unexpectedly",
2289 addr->transport->driver_name);
2294 if ((status & 0xffff) != 0)
2296 int msb = (status >> 8) & 255;
2297 int lsb = status & 255;
2298 int code = (msb == 0)? (lsb & 0x7f) : msb;
2299 if (msb != 0 || (code != SIGTERM && code != SIGKILL && code != SIGQUIT))
2300 addr->special_action = SPECIAL_FREEZE;
2301 log_write(0, LOG_MAIN|LOG_PANIC, "%s transport process returned non-zero "
2302 "status 0x%04x: %s %d",
2303 addr->transport->driver_name,
2305 msb == 0 ? "terminated by signal" : "exit code",
2309 /* If SPECIAL_WARN is set in the top address, send a warning message. */
2311 if (addr->special_action == SPECIAL_WARN && addr->transport->warn_message)
2314 uschar *warn_message;
2317 DEBUG(D_deliver) debug_printf("Warning message requested by transport\n");
2319 if (!(warn_message = expand_string(addr->transport->warn_message)))
2320 log_write(0, LOG_MAIN|LOG_PANIC, "Failed to expand \"%s\" (warning "
2321 "message for %s transport): %s", addr->transport->warn_message,
2322 addr->transport->name, expand_string_message);
2324 else if ((pid = child_open_exim(&fd)) > 0)
2326 FILE *f = fdopen(fd, "wb");
2327 if (errors_reply_to && !contains_header(US"Reply-To", warn_message))
2328 fprintf(f, "Reply-To: %s\n", errors_reply_to);
2329 fprintf(f, "Auto-Submitted: auto-replied\n");
2330 if (!contains_header(US"From", warn_message))
2332 fprintf(f, "%s", CS warn_message);
2334 /* Close and wait for child process to complete, without a timeout. */
2337 (void)child_close(pid, 0);
2340 addr->special_action = SPECIAL_NONE;
2347 /* Check transport for the given concurrency limit. Return TRUE if over
2348 the limit (or an expansion failure), else FALSE and if there was a limit,
2349 the key for the hints database used for the concurrency count. */
2352 tpt_parallel_check(transport_instance * tp, address_item * addr, uschar ** key)
2354 unsigned max_parallel;
2356 if (!tp->max_parallel) return FALSE;
2358 max_parallel = (unsigned) expand_string_integer(tp->max_parallel, TRUE);
2359 if (expand_string_message)
2361 log_write(0, LOG_MAIN|LOG_PANIC, "Failed to expand max_parallel option "
2362 "in %s transport (%s): %s", tp->name, addr->address,
2363 expand_string_message);
2367 if (max_parallel > 0)
2369 uschar * serialize_key = string_sprintf("tpt-serialize-%s", tp->name);
2370 if (!enq_start(serialize_key, max_parallel))
2372 address_item * next;
2374 debug_printf("skipping tpt %s because concurrency limit %u reached\n",
2375 tp->name, max_parallel);
2379 addr->message = US"concurrency limit reached for transport";
2380 addr->basic_errno = ERRNO_TRETRY;
2381 post_process_one(addr, DEFER, LOG_MAIN, DTYPE_TRANSPORT, 0);
2382 } while ((addr = next));
2385 *key = serialize_key;
2392 /*************************************************
2393 * Do local deliveries *
2394 *************************************************/
2396 /* This function processes the list of addresses in addr_local. True local
2397 deliveries are always done one address at a time. However, local deliveries can
2398 be batched up in some cases. Typically this is when writing batched SMTP output
2399 files for use by some external transport mechanism, or when running local
2400 deliveries over LMTP.
2407 do_local_deliveries(void)
2410 open_db *dbm_file = NULL;
2411 time_t now = time(NULL);
2413 /* Loop until we have exhausted the supply of local deliveries */
2417 time_t delivery_start;
2419 address_item *addr2, *addr3, *nextaddr;
2420 int logflags = LOG_MAIN;
2421 int logchar = dont_deliver? '*' : '=';
2422 transport_instance *tp;
2423 uschar * serialize_key = NULL;
2425 /* Pick the first undelivered address off the chain */
2427 address_item *addr = addr_local;
2428 addr_local = addr->next;
2431 DEBUG(D_deliver|D_transport)
2432 debug_printf("--------> %s <--------\n", addr->address);
2434 /* An internal disaster if there is no transport. Should not occur! */
2436 if (!(tp = addr->transport))
2438 logflags |= LOG_PANIC;
2439 disable_logging = FALSE; /* Jic */
2440 addr->message = addr->router
2441 ? string_sprintf("No transport set by %s router", addr->router->name)
2442 : string_sprintf("No transport set by system filter");
2443 post_process_one(addr, DEFER, logflags, DTYPE_TRANSPORT, 0);
2447 /* Check that this base address hasn't previously been delivered to this
2448 transport. The check is necessary at this point to handle homonymic addresses
2449 correctly in cases where the pattern of redirection changes between delivery
2450 attempts. Non-homonymic previous delivery is detected earlier, at routing
2453 if (previously_transported(addr, FALSE)) continue;
2455 /* There are weird cases where logging is disabled */
2457 disable_logging = tp->disable_logging;
2459 /* Check for batched addresses and possible amalgamation. Skip all the work
2460 if either batch_max <= 1 or there aren't any other addresses for local
2463 if (tp->batch_max > 1 && addr_local)
2465 int batch_count = 1;
2466 BOOL uses_dom = readconf_depends((driver_instance *)tp, US"domain");
2467 BOOL uses_lp = ( testflag(addr, af_pfr)
2468 && (testflag(addr, af_file) || addr->local_part[0] == '|')
2470 || readconf_depends((driver_instance *)tp, US"local_part");
2471 uschar *batch_id = NULL;
2472 address_item **anchor = &addr_local;
2473 address_item *last = addr;
2476 /* Expand the batch_id string for comparison with other addresses.
2477 Expansion failure suppresses batching. */
2481 deliver_set_expansions(addr);
2482 batch_id = expand_string(tp->batch_id);
2483 deliver_set_expansions(NULL);
2486 log_write(0, LOG_MAIN|LOG_PANIC, "Failed to expand batch_id option "
2487 "in %s transport (%s): %s", tp->name, addr->address,
2488 expand_string_message);
2489 batch_count = tp->batch_max;
2493 /* Until we reach the batch_max limit, pick off addresses which have the
2494 same characteristics. These are:
2497 not previously delivered (see comment about 50 lines above)
2498 same local part if the transport's configuration contains $local_part
2499 or if this is a file or pipe delivery from a redirection
2500 same domain if the transport's configuration contains $domain
2502 same additional headers
2503 same headers to be removed
2504 same uid/gid for running the transport
2505 same first host if a host list is set
2508 while ((next = *anchor) && batch_count < tp->batch_max)
2511 tp == next->transport
2512 && !previously_transported(next, TRUE)
2513 && (addr->flags & (af_pfr|af_file)) == (next->flags & (af_pfr|af_file))
2514 && (!uses_lp || Ustrcmp(next->local_part, addr->local_part) == 0)
2515 && (!uses_dom || Ustrcmp(next->domain, addr->domain) == 0)
2516 && same_strings(next->prop.errors_address, addr->prop.errors_address)
2517 && same_headers(next->prop.extra_headers, addr->prop.extra_headers)
2518 && same_strings(next->prop.remove_headers, addr->prop.remove_headers)
2519 && same_ugid(tp, addr, next)
2520 && ( !addr->host_list && !next->host_list
2523 && Ustrcmp(addr->host_list->name, next->host_list->name) == 0
2526 /* If the transport has a batch_id setting, batch_id will be non-NULL
2527 from the expansion outside the loop. Expand for this address and compare.
2528 Expansion failure makes this address ineligible for batching. */
2533 address_item *save_nextnext = next->next;
2534 next->next = NULL; /* Expansion for a single address */
2535 deliver_set_expansions(next);
2536 next->next = save_nextnext;
2537 bid = expand_string(tp->batch_id);
2538 deliver_set_expansions(NULL);
2541 log_write(0, LOG_MAIN|LOG_PANIC, "Failed to expand batch_id option "
2542 "in %s transport (%s): %s", tp->name, next->address,
2543 expand_string_message);
2546 else ok = (Ustrcmp(batch_id, bid) == 0);
2549 /* Take address into batch if OK. */
2553 *anchor = next->next; /* Include the address */
2559 else anchor = &next->next; /* Skip the address */
2563 /* We now have one or more addresses that can be delivered in a batch. Check
2564 whether the transport is prepared to accept a message of this size. If not,
2565 fail them all forthwith. If the expansion fails, or does not yield an
2566 integer, defer delivery. */
2568 if (tp->message_size_limit)
2570 int rc = check_message_size(tp, addr);
2573 replicate_status(addr);
2577 post_process_one(addr, rc, logflags, DTYPE_TRANSPORT, 0);
2580 continue; /* With next batch of addresses */
2584 /* If we are not running the queue, or if forcing, all deliveries will be
2585 attempted. Otherwise, we must respect the retry times for each address. Even
2586 when not doing this, we need to set up the retry key string, and determine
2587 whether a retry record exists, because after a successful delivery, a delete
2588 retry item must be set up. Keep the retry database open only for the duration
2589 of these checks, rather than for all local deliveries, because some local
2590 deliveries (e.g. to pipes) can take a substantial time. */
2592 if (!(dbm_file = dbfn_open(US"retry", O_RDONLY, &dbblock, FALSE)))
2594 DEBUG(D_deliver|D_retry|D_hints_lookup)
2595 debug_printf("no retry data available\n");
2602 BOOL ok = TRUE; /* to deliver this address */
2605 /* Set up the retry key to include the domain or not, and change its
2606 leading character from "R" to "T". Must make a copy before doing this,
2607 because the old key may be pointed to from a "delete" retry item after
2610 retry_key = string_copy(
2611 tp->retry_use_local_part ? addr2->address_retry_key :
2612 addr2->domain_retry_key);
2615 /* Inspect the retry data. If there is no hints file, delivery happens. */
2619 dbdata_retry *retry_record = dbfn_read(dbm_file, retry_key);
2621 /* If there is no retry record, delivery happens. If there is,
2622 remember it exists so it can be deleted after a successful delivery. */
2626 setflag(addr2, af_lt_retry_exists);
2628 /* A retry record exists for this address. If queue running and not
2629 forcing, inspect its contents. If the record is too old, or if its
2630 retry time has come, or if it has passed its cutoff time, delivery
2635 debug_printf("retry record exists: age=%s ",
2636 readconf_printtime(now - retry_record->time_stamp));
2637 debug_printf("(max %s)\n", readconf_printtime(retry_data_expire));
2638 debug_printf(" time to retry = %s expired = %d\n",
2639 readconf_printtime(retry_record->next_try - now),
2640 retry_record->expired);
2643 if (queue_running && !deliver_force)
2645 ok = (now - retry_record->time_stamp > retry_data_expire)
2646 || (now >= retry_record->next_try)
2647 || retry_record->expired;
2649 /* If we haven't reached the retry time, there is one more check
2650 to do, which is for the ultimate address timeout. */
2653 ok = retry_ultimate_address_timeout(retry_key, addr2->domain,
2657 else DEBUG(D_retry) debug_printf("no retry record exists\n");
2660 /* This address is to be delivered. Leave it on the chain. */
2665 addr2 = addr2->next;
2668 /* This address is to be deferred. Take it out of the chain, and
2669 post-process it as complete. Must take it out of the chain first,
2670 because post processing puts it on another chain. */
2674 address_item *this = addr2;
2675 this->message = US"Retry time not yet reached";
2676 this->basic_errno = ERRNO_LRETRY;
2677 addr2 = addr3 ? (addr3->next = addr2->next)
2678 : (addr = addr2->next);
2679 post_process_one(this, DEFER, logflags, DTYPE_TRANSPORT, 0);
2683 if (dbm_file) dbfn_close(dbm_file);
2685 /* If there are no addresses left on the chain, they all deferred. Loop
2686 for the next set of addresses. */
2688 if (!addr) continue;
2690 /* If the transport is limited for parallellism, enforce that here.
2691 We use a hints DB entry, incremented here and decremented after
2692 the transport (and any shadow transport) completes. */
2694 if (tpt_parallel_check(tp, addr, &serialize_key))
2696 if (expand_string_message)
2698 logflags |= LOG_PANIC;
2702 post_process_one(addr, DEFER, logflags, DTYPE_TRANSPORT, 0);
2703 } while ((addr = addr2));
2705 continue; /* Loop for the next set of addresses. */
2709 /* So, finally, we do have some addresses that can be passed to the
2710 transport. Before doing so, set up variables that are relevant to a
2713 deliver_set_expansions(addr);
2714 delivery_start = time(NULL);
2715 deliver_local(addr, FALSE);
2716 deliver_time = (int)(time(NULL) - delivery_start);
2718 /* If a shadow transport (which must perforce be another local transport), is
2719 defined, and its condition is met, we must pass the message to the shadow
2720 too, but only those addresses that succeeded. We do this by making a new
2721 chain of addresses - also to keep the original chain uncontaminated. We must
2722 use a chain rather than doing it one by one, because the shadow transport may
2725 NOTE: if the condition fails because of a lookup defer, there is nothing we
2729 && ( !tp->shadow_condition
2730 || expand_check_condition(tp->shadow_condition, tp->name, US"transport")
2733 transport_instance *stp;
2734 address_item *shadow_addr = NULL;
2735 address_item **last = &shadow_addr;
2737 for (stp = transports; stp; stp = stp->next)
2738 if (Ustrcmp(stp->name, tp->shadow) == 0) break;
2741 log_write(0, LOG_MAIN|LOG_PANIC, "shadow transport \"%s\" not found ",
2744 /* Pick off the addresses that have succeeded, and make clones. Put into
2745 the shadow_message field a pointer to the shadow_message field of the real
2748 else for (addr2 = addr; addr2; addr2 = addr2->next)
2749 if (addr2->transport_return == OK)
2751 addr3 = store_get(sizeof(address_item));
2754 addr3->shadow_message = (uschar *) &(addr2->shadow_message);
2755 addr3->transport = stp;
2756 addr3->transport_return = DEFER;
2757 addr3->return_filename = NULL;
2758 addr3->return_file = -1;
2760 last = &(addr3->next);
2763 /* If we found any addresses to shadow, run the delivery, and stick any
2764 message back into the shadow_message field in the original. */
2768 int save_count = transport_count;
2770 DEBUG(D_deliver|D_transport)
2771 debug_printf(">>>>>>>>>>>>>>>> Shadow delivery >>>>>>>>>>>>>>>>\n");
2772 deliver_local(shadow_addr, TRUE);
2774 for(; shadow_addr; shadow_addr = shadow_addr->next)
2776 int sresult = shadow_addr->transport_return;
2777 *(uschar **)shadow_addr->shadow_message =
2779 ? string_sprintf(" ST=%s", stp->name)
2780 : string_sprintf(" ST=%s (%s%s%s)", stp->name,
2781 shadow_addr->basic_errno <= 0
2783 : US strerror(shadow_addr->basic_errno),
2784 shadow_addr->basic_errno <= 0 || !shadow_addr->message
2787 shadow_addr->message
2788 ? shadow_addr->message
2789 : shadow_addr->basic_errno <= 0
2793 DEBUG(D_deliver|D_transport)
2794 debug_printf("%s shadow transport returned %s for %s\n",
2796 sresult == OK ? "OK" :
2797 sresult == DEFER ? "DEFER" :
2798 sresult == FAIL ? "FAIL" :
2799 sresult == PANIC ? "PANIC" : "?",
2800 shadow_addr->address);
2803 DEBUG(D_deliver|D_transport)
2804 debug_printf(">>>>>>>>>>>>>>>> End shadow delivery >>>>>>>>>>>>>>>>\n");
2806 transport_count = save_count; /* Restore original transport count */
2810 /* Cancel the expansions that were set up for the delivery. */
2812 deliver_set_expansions(NULL);
2814 /* If the transport was parallelism-limited, decrement the hints DB record. */
2816 if (serialize_key) enq_end(serialize_key);
2818 /* Now we can process the results of the real transport. We must take each
2819 address off the chain first, because post_process_one() puts it on another
2822 for (addr2 = addr; addr2; addr2 = nextaddr)
2824 int result = addr2->transport_return;
2825 nextaddr = addr2->next;
2827 DEBUG(D_deliver|D_transport)
2828 debug_printf("%s transport returned %s for %s\n",
2830 result == OK ? "OK" :
2831 result == DEFER ? "DEFER" :
2832 result == FAIL ? "FAIL" :
2833 result == PANIC ? "PANIC" : "?",
2836 /* If there is a retry_record, or if delivery is deferred, build a retry
2837 item for setting a new retry time or deleting the old retry record from
2838 the database. These items are handled all together after all addresses
2839 have been handled (so the database is open just for a short time for
2842 if (result == DEFER || testflag(addr2, af_lt_retry_exists))
2844 int flags = result == DEFER ? 0 : rf_delete;
2845 uschar *retry_key = string_copy(tp->retry_use_local_part
2846 ? addr2->address_retry_key : addr2->domain_retry_key);
2848 retry_add_item(addr2, retry_key, flags);
2851 /* Done with this address */
2853 if (result == OK) addr2->more_errno = deliver_time;
2854 post_process_one(addr2, result, logflags, DTYPE_TRANSPORT, logchar);
2856 /* If a pipe delivery generated text to be sent back, the result may be
2857 changed to FAIL, and we must copy this for subsequent addresses in the
2860 if (addr2->transport_return != result)
2862 for (addr3 = nextaddr; addr3; addr3 = addr3->next)
2864 addr3->transport_return = addr2->transport_return;
2865 addr3->basic_errno = addr2->basic_errno;
2866 addr3->message = addr2->message;
2868 result = addr2->transport_return;
2871 /* Whether or not the result was changed to FAIL, we need to copy the
2872 return_file value from the first address into all the addresses of the
2873 batch, so they are all listed in the error message. */
2875 addr2->return_file = addr->return_file;
2877 /* Change log character for recording successful deliveries. */
2879 if (result == OK) logchar = '-';
2881 } /* Loop back for next batch of addresses */
2887 /*************************************************
2888 * Sort remote deliveries *
2889 *************************************************/
2891 /* This function is called if remote_sort_domains is set. It arranges that the
2892 chain of addresses for remote deliveries is ordered according to the strings
2893 specified. Try to make this shuffling reasonably efficient by handling
2894 sequences of addresses rather than just single ones.
2901 sort_remote_deliveries(void)
2904 address_item **aptr = &addr_remote;
2905 const uschar *listptr = remote_sort_domains;
2910 && (pattern = string_nextinlist(&listptr, &sep, patbuf, sizeof(patbuf)))
2913 address_item *moved = NULL;
2914 address_item **bptr = &moved;
2918 address_item **next;
2919 deliver_domain = (*aptr)->domain; /* set $domain */
2920 if (match_isinlist(deliver_domain, (const uschar **)&pattern, UCHAR_MAX+1,
2921 &domainlist_anchor, NULL, MCL_DOMAIN, TRUE, NULL) == OK)
2923 aptr = &(*aptr)->next;
2927 next = &(*aptr)->next;
2929 && (deliver_domain = (*next)->domain, /* Set $domain */
2930 match_isinlist(deliver_domain, (const uschar **)&pattern, UCHAR_MAX+1,
2931 &domainlist_anchor, NULL, MCL_DOMAIN, TRUE, NULL)) != OK
2933 next = &(*next)->next;
2935 /* If the batch of non-matchers is at the end, add on any that were
2936 extracted further up the chain, and end this iteration. Otherwise,
2937 extract them from the chain and hang on the moved chain. */
2949 aptr = &(*aptr)->next;
2952 /* If the loop ended because the final address matched, *aptr will
2953 be NULL. Add on to the end any extracted non-matching addresses. If
2954 *aptr is not NULL, the loop ended via "break" when *next is null, that
2955 is, there was a string of non-matching addresses at the end. In this
2956 case the extracted addresses have already been added on the end. */
2958 if (!*aptr) *aptr = moved;
2964 debug_printf("remote addresses after sorting:\n");
2965 for (addr = addr_remote; addr; addr = addr->next)
2966 debug_printf(" %s\n", addr->address);
2972 /*************************************************
2973 * Read from pipe for remote delivery subprocess *
2974 *************************************************/
2976 /* This function is called when the subprocess is complete, but can also be
2977 called before it is complete, in order to empty a pipe that is full (to prevent
2978 deadlock). It must therefore keep track of its progress in the parlist data
2981 We read the pipe to get the delivery status codes and a possible error message
2982 for each address, optionally preceded by unusability data for the hosts and
2983 also by optional retry data.
2985 Read in large chunks into the big buffer and then scan through, interpreting
2986 the data therein. In most cases, only a single read will be necessary. No
2987 individual item will ever be anywhere near 2500 bytes in length, so by ensuring
2988 that we read the next chunk when there is less than 2500 bytes left in the
2989 non-final chunk, we can assume each item is complete in the buffer before
2990 handling it. Each item is written using a single write(), which is atomic for
2991 small items (less than PIPE_BUF, which seems to be at least 512 in any Unix and
2992 often bigger) so even if we are reading while the subprocess is still going, we
2993 should never have only a partial item in the buffer.
2996 poffset the offset of the parlist item
2997 eop TRUE if the process has completed
2999 Returns: TRUE if the terminating 'Z' item has been read,
3000 or there has been a disaster (i.e. no more data needed);
3005 par_read_pipe(int poffset, BOOL eop)
3008 pardata *p = parlist + poffset;
3009 address_item *addrlist = p->addrlist;
3010 address_item *addr = p->addr;
3013 uschar *endptr = big_buffer;
3014 uschar *ptr = endptr;
3015 uschar *msg = p->msg;
3016 BOOL done = p->done;
3017 BOOL unfinished = TRUE;
3018 /* minimum size to read is header size including id, subid and length */
3019 int required = PIPE_HEADER_SIZE;
3021 /* Loop through all items, reading from the pipe when necessary. The pipe
3022 is set up to be non-blocking, but there are two different Unix mechanisms in
3023 use. Exim uses O_NONBLOCK if it is defined. This returns 0 for end of file,
3024 and EAGAIN for no more data. If O_NONBLOCK is not defined, Exim uses O_NDELAY,
3025 which returns 0 for both end of file and no more data. We distinguish the
3026 two cases by taking 0 as end of file only when we know the process has
3029 Each separate item is written to the pipe in a single write(), and as they are
3030 all short items, the writes will all be atomic and we should never find
3031 ourselves in the position of having read an incomplete item. "Short" in this
3032 case can mean up to about 1K in the case when there is a long error message
3033 associated with an address. */
3035 DEBUG(D_deliver) debug_printf("reading pipe for subprocess %d (%s)\n",
3036 (int)p->pid, eop? "ended" : "not ended");
3040 retry_item *r, **rp;
3041 int remaining = endptr - ptr;
3042 uschar header[PIPE_HEADER_SIZE + 1];
3046 /* Read (first time) or top up the chars in the buffer if necessary.
3047 There will be only one read if we get all the available data (i.e. don't
3048 fill the buffer completely). */
3050 if (remaining < required && unfinished)
3053 int available = big_buffer_size - remaining;
3055 if (remaining > 0) memmove(big_buffer, ptr, remaining);
3058 endptr = big_buffer + remaining;
3059 len = read(fd, endptr, available);
3061 DEBUG(D_deliver) debug_printf("read() yielded %d\n", len);
3063 /* If the result is EAGAIN and the process is not complete, just
3064 stop reading any more and process what we have already. */
3068 if (!eop && errno == EAGAIN) len = 0; else
3070 msg = string_sprintf("failed to read pipe from transport process "
3071 "%d for transport %s: %s", pid, addr->transport->driver_name,
3077 /* If the length is zero (eof or no-more-data), just process what we
3078 already have. Note that if the process is still running and we have
3079 read all the data in the pipe (but less that "available") then we
3080 won't read any more, as "unfinished" will get set FALSE. */
3084 unfinished = len == available;
3087 /* If we are at the end of the available data, exit the loop. */
3088 if (ptr >= endptr) break;
3090 /* copy and read header */
3091 memcpy(header, ptr, PIPE_HEADER_SIZE);
3092 header[PIPE_HEADER_SIZE] = '\0';
3095 required = Ustrtol(header + 2, &endc, 10) + PIPE_HEADER_SIZE; /* header + data */
3098 msg = string_sprintf("failed to read pipe from transport process "
3099 "%d for transport %s: error reading size from header", pid, addr->transport->driver_name);
3105 debug_printf("header read id:%c,subid:%c,size:%s,required:%d,remaining:%d,unfinished:%d\n",
3106 id, subid, header+2, required, remaining, unfinished);
3108 /* is there room for the dataset we want to read ? */
3109 if (required > big_buffer_size - PIPE_HEADER_SIZE)
3111 msg = string_sprintf("failed to read pipe from transport process "
3112 "%d for transport %s: big_buffer too small! required size=%d buffer size=%d", pid, addr->transport->driver_name,
3113 required, big_buffer_size - PIPE_HEADER_SIZE);
3118 /* we wrote all datasets with atomic write() calls
3119 remaining < required only happens if big_buffer was too small
3120 to get all available data from pipe. unfinished has to be true
3122 if (remaining < required)
3126 msg = string_sprintf("failed to read pipe from transport process "
3127 "%d for transport %s: required size=%d > remaining size=%d and unfinished=false",
3128 pid, addr->transport->driver_name, required, remaining);
3133 /* step behind the header */
3134 ptr += PIPE_HEADER_SIZE;
3136 /* Handle each possible type of item, assuming the complete item is
3137 available in store. */
3141 /* Host items exist only if any hosts were marked unusable. Match
3142 up by checking the IP address. */
3145 for (h = addrlist->host_list; h; h = h->next)
3147 if (!h->address || Ustrcmp(h->address, ptr+2) != 0) continue;
3155 /* Retry items are sent in a preceding R item for each address. This is
3156 kept separate to keep each message short enough to guarantee it won't
3157 be split in the pipe. Hopefully, in the majority of cases, there won't in
3158 fact be any retry items at all.
3160 The complete set of retry items might include an item to delete a
3161 routing retry if there was a previous routing delay. However, routing
3162 retries are also used when a remote transport identifies an address error.
3163 In that case, there may also be an "add" item for the same key. Arrange
3164 that a "delete" item is dropped in favour of an "add" item. */
3167 if (!addr) goto ADDR_MISMATCH;
3169 DEBUG(D_deliver|D_retry)
3170 debug_printf("reading retry information for %s from subprocess\n",
3173 /* Cut out any "delete" items on the list. */
3175 for (rp = &(addr->retries); (r = *rp); rp = &r->next)
3176 if (Ustrcmp(r->key, ptr+1) == 0) /* Found item with same key */
3178 if ((r->flags & rf_delete) == 0) break; /* It was not "delete" */
3179 *rp = r->next; /* Excise a delete item */
3180 DEBUG(D_deliver|D_retry)
3181 debug_printf(" existing delete item dropped\n");
3184 /* We want to add a delete item only if there is no non-delete item;
3185 however we still have to step ptr through the data. */
3187 if (!r || (*ptr & rf_delete) == 0)
3189 r = store_get(sizeof(retry_item));
3190 r->next = addr->retries;
3193 r->key = string_copy(ptr);
3195 memcpy(&(r->basic_errno), ptr, sizeof(r->basic_errno));
3196 ptr += sizeof(r->basic_errno);
3197 memcpy(&(r->more_errno), ptr, sizeof(r->more_errno));
3198 ptr += sizeof(r->more_errno);
3199 r->message = (*ptr)? string_copy(ptr) : NULL;
3200 DEBUG(D_deliver|D_retry)
3201 debug_printf(" added %s item\n",
3202 ((r->flags & rf_delete) == 0)? "retry" : "delete");
3207 DEBUG(D_deliver|D_retry)
3208 debug_printf(" delete item not added: non-delete item exists\n");
3211 ptr += sizeof(r->basic_errno) + sizeof(r->more_errno);
3217 /* Put the amount of data written into the parlist block */
3220 memcpy(&(p->transport_count), ptr, sizeof(transport_count));
3221 ptr += sizeof(transport_count);
3224 /* Address items are in the order of items on the address chain. We
3225 remember the current address value in case this function is called
3226 several times to empty the pipe in stages. Information about delivery
3227 over TLS is sent in a preceding X item for each address. We don't put
3228 it in with the other info, in order to keep each message short enough to
3229 guarantee it won't be split in the pipe. */
3233 if (!addr) goto ADDR_MISMATCH; /* Below, in 'A' handler */
3237 addr->cipher = NULL;
3238 addr->peerdn = NULL;
3241 addr->cipher = string_copy(ptr);
3244 addr->peerdn = string_copy(ptr);
3249 (void) tls_import_cert(ptr, &addr->peercert);
3251 addr->peercert = NULL;
3256 (void) tls_import_cert(ptr, &addr->ourcert);
3258 addr->ourcert = NULL;
3261 # ifndef DISABLE_OCSP
3263 addr->ocsp = OCSP_NOT_REQ;
3265 addr->ocsp = *ptr - '0';
3271 #endif /*SUPPORT_TLS*/
3273 case 'C': /* client authenticator information */
3277 addr->authenticator = (*ptr)? string_copy(ptr) : NULL;
3280 addr->auth_id = (*ptr)? string_copy(ptr) : NULL;
3283 addr->auth_sndr = (*ptr)? string_copy(ptr) : NULL;
3289 #ifndef DISABLE_PRDR
3291 addr->flags |= af_prdr_used;
3296 addr->flags |= af_chunking_used;
3300 if (!addr) goto ADDR_MISMATCH;
3301 memcpy(&(addr->dsn_aware), ptr, sizeof(addr->dsn_aware));
3302 ptr += sizeof(addr->dsn_aware);
3303 DEBUG(D_deliver) debug_printf("DSN read: addr->dsn_aware = %d\n", addr->dsn_aware);
3310 msg = string_sprintf("address count mismatch for data read from pipe "
3311 "for transport process %d for transport %s", pid,
3312 addrlist->transport->driver_name);
3319 #ifdef SUPPORT_SOCKS
3320 case '2': /* proxy information; must arrive before A0 and applies to that addr XXX oops*/
3321 proxy_session = TRUE; /*XXX shouod this be cleared somewhere? */
3326 proxy_local_address = string_copy(ptr);
3328 memcpy(&proxy_local_port, ptr, sizeof(proxy_local_port));
3329 ptr += sizeof(proxy_local_port);
3334 #ifdef EXPERIMENTAL_DSN_INFO
3335 case '1': /* must arrive before A0, and applies to that addr */
3336 /* Two strings: smtp_greeting and helo_response */
3337 addr->smtp_greeting = string_copy(ptr);
3339 addr->helo_response = string_copy(ptr);
3345 addr->transport_return = *ptr++;
3346 addr->special_action = *ptr++;
3347 memcpy(&(addr->basic_errno), ptr, sizeof(addr->basic_errno));
3348 ptr += sizeof(addr->basic_errno);
3349 memcpy(&(addr->more_errno), ptr, sizeof(addr->more_errno));
3350 ptr += sizeof(addr->more_errno);
3351 memcpy(&(addr->flags), ptr, sizeof(addr->flags));
3352 ptr += sizeof(addr->flags);
3353 addr->message = (*ptr)? string_copy(ptr) : NULL;
3355 addr->user_message = (*ptr)? string_copy(ptr) : NULL;
3358 /* Always two strings for host information, followed by the port number and DNSSEC mark */
3362 h = store_get(sizeof(host_item));
3363 h->name = string_copy(ptr);
3365 h->address = string_copy(ptr);
3367 memcpy(&(h->port), ptr, sizeof(h->port));
3368 ptr += sizeof(h->port);
3369 h->dnssec = *ptr == '2' ? DS_YES
3370 : *ptr == '1' ? DS_NO
3373 addr->host_used = h;
3377 /* Finished with this address */
3384 /* Local interface address/port */
3386 if (*ptr) sending_ip_address = string_copy(ptr);
3388 if (*ptr) sending_port = atoi(CS ptr);
3392 /* Z marks the logical end of the data. It is followed by '0' if
3393 continue_transport was NULL at the end of transporting, otherwise '1'.
3394 We need to know when it becomes NULL during a delivery down a passed SMTP
3395 channel so that we don't try to pass anything more down it. Of course, for
3396 most normal messages it will remain NULL all the time. */
3401 continue_transport = NULL;
3402 continue_hostname = NULL;
3405 DEBUG(D_deliver) debug_printf("Z0%c item read\n", *ptr);
3408 /* Anything else is a disaster. */
3411 msg = string_sprintf("malformed data (%d) read from pipe for transport "
3412 "process %d for transport %s", ptr[-1], pid,
3413 addr->transport->driver_name);
3419 /* The done flag is inspected externally, to determine whether or not to
3420 call the function again when the process finishes. */
3424 /* If the process hadn't finished, and we haven't seen the end of the data
3425 or suffered a disaster, update the rest of the state, and return FALSE to
3426 indicate "not finished". */
3435 /* Close our end of the pipe, to prevent deadlock if the far end is still
3436 pushing stuff into it. */
3441 /* If we have finished without error, but haven't had data for every address,
3442 something is wrong. */
3445 msg = string_sprintf("insufficient address data read from pipe "
3446 "for transport process %d for transport %s", pid,
3447 addr->transport->driver_name);
3449 /* If an error message is set, something has gone wrong in getting back
3450 the delivery data. Put the message into each address and freeze it. */
3453 for (addr = addrlist; addr; addr = addr->next)
3455 addr->transport_return = DEFER;
3456 addr->special_action = SPECIAL_FREEZE;
3457 addr->message = msg;
3460 /* Return TRUE to indicate we have got all we need from this process, even
3461 if it hasn't actually finished yet. */
3468 /*************************************************
3469 * Post-process a set of remote addresses *
3470 *************************************************/
3472 /* Do what has to be done immediately after a remote delivery for each set of
3473 addresses, then re-write the spool if necessary. Note that post_process_one
3474 puts the address on an appropriate queue; hence we must fish off the next
3475 one first. This function is also called if there is a problem with setting
3476 up a subprocess to do a remote delivery in parallel. In this case, the final
3477 argument contains a message, and the action must be forced to DEFER.
3480 addr pointer to chain of address items
3481 logflags flags for logging
3482 msg NULL for normal cases; -> error message for unexpected problems
3483 fallback TRUE if processing fallback hosts
3489 remote_post_process(address_item *addr, int logflags, uschar *msg,
3494 /* If any host addresses were found to be unusable, add them to the unusable
3495 tree so that subsequent deliveries don't try them. */
3497 for (h = addr->host_list; h; h = h->next)
3499 if (h->status >= hstatus_unusable) tree_add_unusable(h);
3501 /* Now handle each address on the chain. The transport has placed '=' or '-'
3502 into the special_action field for each successful delivery. */
3506 address_item *next = addr->next;
3508 /* If msg == NULL (normal processing) and the result is DEFER and we are
3509 processing the main hosts and there are fallback hosts available, put the
3510 address on the list for fallback delivery. */
3512 if ( addr->transport_return == DEFER
3513 && addr->fallback_hosts
3518 addr->host_list = addr->fallback_hosts;
3519 addr->next = addr_fallback;
3520 addr_fallback = addr;
3521 DEBUG(D_deliver) debug_printf("%s queued for fallback host(s)\n", addr->address);
3524 /* If msg is set (=> unexpected problem), set it in the address before
3525 doing the ordinary post processing. */
3531 addr->message = msg;
3532 addr->transport_return = DEFER;
3534 (void)post_process_one(addr, addr->transport_return, logflags,
3535 DTYPE_TRANSPORT, addr->special_action);
3543 /* If we have just delivered down a passed SMTP channel, and that was
3544 the last address, the channel will have been closed down. Now that
3545 we have logged that delivery, set continue_sequence to 1 so that
3546 any subsequent deliveries don't get "*" incorrectly logged. */
3548 if (!continue_transport) continue_sequence = 1;
3553 /*************************************************
3554 * Wait for one remote delivery subprocess *
3555 *************************************************/
3557 /* This function is called while doing remote deliveries when either the
3558 maximum number of processes exist and we need one to complete so that another
3559 can be created, or when waiting for the last ones to complete. It must wait for
3560 the completion of one subprocess, empty the control block slot, and return a
3561 pointer to the address chain.
3564 Returns: pointer to the chain of addresses handled by the process;
3565 NULL if no subprocess found - this is an unexpected error
3568 static address_item *
3571 int poffset, status;
3572 address_item *addr, *addrlist;
3575 set_process_info("delivering %s: waiting for a remote delivery subprocess "
3576 "to finish", message_id);
3578 /* Loop until either a subprocess completes, or there are no subprocesses in
3579 existence - in which case give an error return. We cannot proceed just by
3580 waiting for a completion, because a subprocess may have filled up its pipe, and
3581 be waiting for it to be emptied. Therefore, if no processes have finished, we
3582 wait for one of the pipes to acquire some data by calling select(), with a
3583 timeout just in case.
3585 The simple approach is just to iterate after reading data from a ready pipe.
3586 This leads to non-ideal behaviour when the subprocess has written its final Z
3587 item, closed the pipe, and is in the process of exiting (the common case). A
3588 call to waitpid() yields nothing completed, but select() shows the pipe ready -
3589 reading it yields EOF, so you end up with busy-waiting until the subprocess has
3592 To avoid this, if all the data that is needed has been read from a subprocess
3593 after select(), an explicit wait() for it is done. We know that all it is doing
3594 is writing to the pipe and then exiting, so the wait should not be long.
3596 The non-blocking waitpid() is to some extent just insurance; if we could
3597 reliably detect end-of-file on the pipe, we could always know when to do a
3598 blocking wait() for a completed process. However, because some systems use
3599 NDELAY, which doesn't distinguish between EOF and pipe empty, it is easier to
3600 use code that functions without the need to recognize EOF.
3602 There's a double loop here just in case we end up with a process that is not in
3603 the list of remote delivery processes. Something has obviously gone wrong if
3604 this is the case. (For example, a process that is incorrectly left over from
3605 routing or local deliveries might be found.) The damage can be minimized by
3606 looping back and looking for another process. If there aren't any, the error
3607 return will happen. */
3609 for (;;) /* Normally we do not repeat this loop */
3611 while ((pid = waitpid(-1, &status, WNOHANG)) <= 0)
3614 fd_set select_pipes;
3615 int maxpipe, readycount;
3617 /* A return value of -1 can mean several things. If errno != ECHILD, it
3618 either means invalid options (which we discount), or that this process was
3619 interrupted by a signal. Just loop to try the waitpid() again.
3621 If errno == ECHILD, waitpid() is telling us that there are no subprocesses
3622 in existence. This should never happen, and is an unexpected error.
3623 However, there is a nasty complication when running under Linux. If "strace
3624 -f" is being used under Linux to trace this process and its children,
3625 subprocesses are "stolen" from their parents and become the children of the
3626 tracing process. A general wait such as the one we've just obeyed returns
3627 as if there are no children while subprocesses are running. Once a
3628 subprocess completes, it is restored to the parent, and waitpid(-1) finds
3629 it. Thanks to Joachim Wieland for finding all this out and suggesting a
3632 This does not happen using "truss" on Solaris, nor (I think) with other
3633 tracing facilities on other OS. It seems to be specific to Linux.
3635 What we do to get round this is to use kill() to see if any of our
3636 subprocesses are still in existence. If kill() gives an OK return, we know
3637 it must be for one of our processes - it can't be for a re-use of the pid,
3638 because if our process had finished, waitpid() would have found it. If any
3639 of our subprocesses are in existence, we proceed to use select() as if
3640 waitpid() had returned zero. I think this is safe. */
3644 if (errno != ECHILD) continue; /* Repeats the waitpid() */
3647 debug_printf("waitpid() returned -1/ECHILD: checking explicitly "
3648 "for process existence\n");
3650 for (poffset = 0; poffset < remote_max_parallel; poffset++)
3652 if ((pid = parlist[poffset].pid) != 0 && kill(pid, 0) == 0)
3654 DEBUG(D_deliver) debug_printf("process %d still exists: assume "
3655 "stolen by strace\n", (int)pid);
3656 break; /* With poffset set */
3660 if (poffset >= remote_max_parallel)
3662 DEBUG(D_deliver) debug_printf("*** no delivery children found\n");
3663 return NULL; /* This is the error return */
3667 /* A pid value greater than 0 breaks the "while" loop. A negative value has
3668 been handled above. A return value of zero means that there is at least one
3669 subprocess, but there are no completed subprocesses. See if any pipes are
3670 ready with any data for reading. */
3672 DEBUG(D_deliver) debug_printf("selecting on subprocess pipes\n");
3675 FD_ZERO(&select_pipes);
3676 for (poffset = 0; poffset < remote_max_parallel; poffset++)
3678 if (parlist[poffset].pid != 0)
3680 int fd = parlist[poffset].fd;
3681 FD_SET(fd, &select_pipes);
3682 if (fd > maxpipe) maxpipe = fd;
3686 /* Stick in a 60-second timeout, just in case. */
3691 readycount = select(maxpipe + 1, (SELECT_ARG2_TYPE *)&select_pipes,
3694 /* Scan through the pipes and read any that are ready; use the count
3695 returned by select() to stop when there are no more. Select() can return
3696 with no processes (e.g. if interrupted). This shouldn't matter.
3698 If par_read_pipe() returns TRUE, it means that either the terminating Z was
3699 read, or there was a disaster. In either case, we are finished with this
3700 process. Do an explicit wait() for the process and break the main loop if
3703 It turns out that we have to deal with the case of an interrupted system
3704 call, which can happen on some operating systems if the signal handling is
3705 set up to do that by default. */
3708 readycount > 0 && poffset < remote_max_parallel;
3711 if ( (pid = parlist[poffset].pid) != 0
3712 && FD_ISSET(parlist[poffset].fd, &select_pipes)
3716 if (par_read_pipe(poffset, FALSE)) /* Finished with this pipe */
3718 for (;;) /* Loop for signals */
3720 pid_t endedpid = waitpid(pid, &status, 0);
3721 if (endedpid == pid) goto PROCESS_DONE;
3722 if (endedpid != (pid_t)(-1) || errno != EINTR)
3723 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Unexpected error return "
3724 "%d (errno = %d) from waitpid() for process %d",
3725 (int)endedpid, errno, (int)pid);
3731 /* Now go back and look for a completed subprocess again. */
3734 /* A completed process was detected by the non-blocking waitpid(). Find the
3735 data block that corresponds to this subprocess. */
3737 for (poffset = 0; poffset < remote_max_parallel; poffset++)
3738 if (pid == parlist[poffset].pid) break;
3740 /* Found the data block; this is a known remote delivery process. We don't
3741 need to repeat the outer loop. This should be what normally happens. */
3743 if (poffset < remote_max_parallel) break;
3745 /* This situation is an error, but it's probably better to carry on looking
3746 for another process than to give up (as we used to do). */
3748 log_write(0, LOG_MAIN|LOG_PANIC, "Process %d finished: not found in remote "
3749 "transport process list", pid);
3750 } /* End of the "for" loop */
3752 /* Come here when all the data was completely read after a select(), and
3753 the process in pid has been wait()ed for. */
3760 debug_printf("remote delivery process %d ended\n", (int)pid);
3762 debug_printf("remote delivery process %d ended: status=%04x\n", (int)pid,
3766 set_process_info("delivering %s", message_id);
3768 /* Get the chain of processed addresses */
3770 addrlist = parlist[poffset].addrlist;
3772 /* If the process did not finish cleanly, record an error and freeze (except
3773 for SIGTERM, SIGKILL and SIGQUIT), and also ensure the journal is not removed,
3774 in case the delivery did actually happen. */
3776 if ((status & 0xffff) != 0)
3779 int msb = (status >> 8) & 255;
3780 int lsb = status & 255;
3781 int code = (msb == 0)? (lsb & 0x7f) : msb;
3783 msg = string_sprintf("%s transport process returned non-zero status 0x%04x: "
3785 addrlist->transport->driver_name,
3787 (msb == 0)? "terminated by signal" : "exit code",
3790 if (msb != 0 || (code != SIGTERM && code != SIGKILL && code != SIGQUIT))
3791 addrlist->special_action = SPECIAL_FREEZE;
3793 for (addr = addrlist; addr; addr = addr->next)
3795 addr->transport_return = DEFER;
3796 addr->message = msg;
3799 remove_journal = FALSE;
3802 /* Else complete reading the pipe to get the result of the delivery, if all
3803 the data has not yet been obtained. */
3805 else if (!parlist[poffset].done) (void)par_read_pipe(poffset, TRUE);
3807 /* Put the data count and return path into globals, mark the data slot unused,
3808 decrement the count of subprocesses, and return the address chain. */
3810 transport_count = parlist[poffset].transport_count;
3811 used_return_path = parlist[poffset].return_path;
3812 parlist[poffset].pid = 0;
3819 /*************************************************
3820 * Wait for subprocesses and post-process *
3821 *************************************************/
3823 /* This function waits for subprocesses until the number that are still running
3824 is below a given threshold. For each complete subprocess, the addresses are
3825 post-processed. If we can't find a running process, there is some shambles.
3826 Better not bomb out, as that might lead to multiple copies of the message. Just
3827 log and proceed as if all done.
3830 max maximum number of subprocesses to leave running
3831 fallback TRUE if processing fallback hosts
3837 par_reduce(int max, BOOL fallback)
3839 while (parcount > max)
3841 address_item *doneaddr = par_wait();
3844 log_write(0, LOG_MAIN|LOG_PANIC,
3845 "remote delivery process count got out of step");
3850 transport_instance * tp = doneaddr->transport;
3851 if (tp->max_parallel)
3852 enq_end(string_sprintf("tpt-serialize-%s", tp->name));
3854 remote_post_process(doneaddr, LOG_MAIN, NULL, fallback);
3863 rmt_dlv_checked_write(int fd, char id, char subid, void * buf, int size)
3865 uschar writebuffer[PIPE_HEADER_SIZE + BIG_BUFFER_SIZE];
3869 /* we assume that size can't get larger then BIG_BUFFER_SIZE which currently is set to 16k */
3870 /* complain to log if someone tries with buffer sizes we can't handle*/
3874 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3875 "Failed writing transport result to pipe: can't handle buffers > 99999 bytes. truncating!\n");
3879 /* to keep the write() atomic we build header in writebuffer and copy buf behind */
3880 /* two write() calls would increase the complexity of reading from pipe */
3882 /* convert size to human readable string prepended by id and subid */
3883 header_length = snprintf(CS writebuffer, PIPE_HEADER_SIZE+1, "%c%c%05d", id, subid, size);
3884 if (header_length != PIPE_HEADER_SIZE)
3886 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "header snprintf failed\n");
3887 writebuffer[0] = '\0';
3890 DEBUG(D_deliver) debug_printf("header write id:%c,subid:%c,size:%d,final:%s\n",
3891 id, subid, size, writebuffer);
3893 if (buf && size > 0)
3894 memcpy(writebuffer + PIPE_HEADER_SIZE, buf, size);
3896 size += PIPE_HEADER_SIZE;
3897 if ((ret = write(fd, writebuffer, size)) != size)
3898 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Failed writing transport result to pipe: %s\n",
3899 ret == -1 ? strerror(errno) : "short write");
3902 /*************************************************
3903 * Do remote deliveries *
3904 *************************************************/
3906 /* This function is called to process the addresses in addr_remote. We must
3907 pick off the queue all addresses that have the same transport, remote
3908 destination, and errors address, and hand them to the transport in one go,
3909 subject to some configured limitations. If this is a run to continue delivering
3910 to an existing delivery channel, skip all but those addresses that can go to
3911 that channel. The skipped addresses just get deferred.
3913 If mua_wrapper is set, all addresses must be able to be sent in a single
3914 transaction. If not, this function yields FALSE.
3916 In Exim 4, remote deliveries are always done in separate processes, even
3917 if remote_max_parallel = 1 or if there's only one delivery to do. The reason
3918 is so that the base process can retain privilege. This makes the
3919 implementation of fallback transports feasible (though not initially done.)
3921 We create up to the configured number of subprocesses, each of which passes
3922 back the delivery state via a pipe. (However, when sending down an existing
3923 connection, remote_max_parallel is forced to 1.)
3926 fallback TRUE if processing fallback hosts
3928 Returns: TRUE normally
3929 FALSE if mua_wrapper is set and the addresses cannot all be sent
3934 do_remote_deliveries(BOOL fallback)
3940 parcount = 0; /* Number of executing subprocesses */
3942 /* When sending down an existing channel, only do one delivery at a time.
3943 We use a local variable (parmax) to hold the maximum number of processes;
3944 this gets reduced from remote_max_parallel if we can't create enough pipes. */
3946 if (continue_transport) remote_max_parallel = 1;
3947 parmax = remote_max_parallel;
3949 /* If the data for keeping a list of processes hasn't yet been
3954 parlist = store_get(remote_max_parallel * sizeof(pardata));
3955 for (poffset = 0; poffset < remote_max_parallel; poffset++)
3956 parlist[poffset].pid = 0;
3959 /* Now loop for each remote delivery */
3961 for (delivery_count = 0; addr_remote; delivery_count++)
3967 int address_count = 1;
3968 int address_count_max;
3970 BOOL use_initgroups;
3971 BOOL pipe_done = FALSE;
3972 transport_instance *tp;
3973 address_item **anchor = &addr_remote;
3974 address_item *addr = addr_remote;
3975 address_item *last = addr;
3978 uschar * serialize_key = NULL;
3980 /* Pull the first address right off the list. */
3982 addr_remote = addr->next;
3985 DEBUG(D_deliver|D_transport)
3986 debug_printf("--------> %s <--------\n", addr->address);
3988 /* If no transport has been set, there has been a big screw-up somewhere. */
3990 if (!(tp = addr->transport))
3992 disable_logging = FALSE; /* Jic */
3993 panicmsg = US"No transport set by router";
3994 goto panic_continue;
3997 /* Check that this base address hasn't previously been delivered to this
3998 transport. The check is necessary at this point to handle homonymic addresses
3999 correctly in cases where the pattern of redirection changes between delivery
4000 attempts. Non-homonymic previous delivery is detected earlier, at routing
4003 if (previously_transported(addr, FALSE)) continue;
4005 /* Force failure if the message is too big. */
4007 if (tp->message_size_limit)
4009 int rc = check_message_size(tp, addr);
4012 addr->transport_return = rc;
4013 remote_post_process(addr, LOG_MAIN, NULL, fallback);
4018 /* Get the flag which specifies whether the transport can handle different
4019 domains that nevertheless resolve to the same set of hosts. If it needs
4020 expanding, get variables set: $address_data, $domain_data, $localpart_data,
4021 $host, $host_address, $host_port. */
4022 if (tp->expand_multi_domain)
4023 deliver_set_expansions(addr);
4025 if (exp_bool(addr, US"transport", tp->name, D_transport,
4026 US"multi_domain", tp->multi_domain, tp->expand_multi_domain,
4027 &multi_domain) != OK)
4029 deliver_set_expansions(NULL);
4030 panicmsg = addr->message;
4031 goto panic_continue;
4034 /* Get the maximum it can handle in one envelope, with zero meaning
4035 unlimited, which is forced for the MUA wrapper case. */
4037 address_count_max = tp->max_addresses;
4038 if (address_count_max == 0 || mua_wrapper) address_count_max = 999999;
4041 /************************************************************************/
4042 /***** This is slightly experimental code, but should be safe. *****/
4044 /* The address_count_max value is the maximum number of addresses that the
4045 transport can send in one envelope. However, the transport must be capable of
4046 dealing with any number of addresses. If the number it gets exceeds its
4047 envelope limitation, it must send multiple copies of the message. This can be
4048 done over a single connection for SMTP, so uses less resources than making
4049 multiple connections. On the other hand, if remote_max_parallel is greater
4050 than one, it is perhaps a good idea to use parallel processing to move the
4051 message faster, even if that results in multiple simultaneous connections to
4054 How can we come to some compromise between these two ideals? What we do is to
4055 limit the number of addresses passed to a single instance of a transport to
4056 the greater of (a) its address limit (rcpt_max for SMTP) and (b) the total
4057 number of addresses routed to remote transports divided by
4058 remote_max_parallel. For example, if the message has 100 remote recipients,
4059 remote max parallel is 2, and rcpt_max is 10, we'd never send more than 50 at
4060 once. But if rcpt_max is 100, we could send up to 100.
4062 Of course, not all the remotely addresses in a message are going to go to the
4063 same set of hosts (except in smarthost configurations), so this is just a
4064 heuristic way of dividing up the work.
4066 Furthermore (1), because this may not be wanted in some cases, and also to
4067 cope with really pathological cases, there is also a limit to the number of
4068 messages that are sent over one connection. This is the same limit that is
4069 used when sending several different messages over the same connection.
4070 Continue_sequence is set when in this situation, to the number sent so
4071 far, including this message.
4073 Furthermore (2), when somebody explicitly sets the maximum value to 1, it
4074 is probably because they are using VERP, in which case they want to pass only
4075 one address at a time to the transport, in order to be able to use
4076 $local_part and $domain in constructing a new return path. We could test for
4077 the use of these variables, but as it is so likely they will be used when the
4078 maximum is 1, we don't bother. Just leave the value alone. */
4080 if ( address_count_max != 1
4081 && address_count_max < remote_delivery_count/remote_max_parallel
4084 int new_max = remote_delivery_count/remote_max_parallel;
4085 int message_max = tp->connection_max_messages;
4086 if (connection_max_messages >= 0) message_max = connection_max_messages;
4087 message_max -= continue_sequence - 1;
4088 if (message_max > 0 && new_max > address_count_max * message_max)
4089 new_max = address_count_max * message_max;
4090 address_count_max = new_max;
4093 /************************************************************************/
4096 /* Pick off all addresses which have the same transport, errors address,
4097 destination, and extra headers. In some cases they point to the same host
4098 list, but we also need to check for identical host lists generated from
4099 entirely different domains. The host list pointers can be NULL in the case
4100 where the hosts are defined in the transport. There is also a configured
4101 maximum limit of addresses that can be handled at once (see comments above
4102 for how it is computed).
4103 If the transport does not handle multiple domains, enforce that also,
4104 and if it might need a per-address check for this, re-evaluate it.
4107 while ((next = *anchor) && address_count < address_count_max)
4110 if ( (multi_domain || Ustrcmp(next->domain, addr->domain) == 0)
4111 && tp == next->transport
4112 && same_hosts(next->host_list, addr->host_list)
4113 && same_strings(next->prop.errors_address, addr->prop.errors_address)
4114 && same_headers(next->prop.extra_headers, addr->prop.extra_headers)
4115 && same_ugid(tp, next, addr)
4116 && ( next->prop.remove_headers == addr->prop.remove_headers
4117 || ( next->prop.remove_headers
4118 && addr->prop.remove_headers
4119 && Ustrcmp(next->prop.remove_headers, addr->prop.remove_headers) == 0
4123 !tp->expand_multi_domain || (deliver_set_expansions(next), 1),
4125 US"transport", next->transport->name, D_transport,
4126 US"multi_domain", next->transport->multi_domain,
4127 next->transport->expand_multi_domain, &md) == OK
4132 *anchor = next->next;
4134 next->first = addr; /* remember top one (for retry processing) */
4139 else anchor = &(next->next);
4140 deliver_set_expansions(NULL);
4143 /* If we are acting as an MUA wrapper, all addresses must go in a single
4144 transaction. If not, put them back on the chain and yield FALSE. */
4146 if (mua_wrapper && addr_remote)
4148 last->next = addr_remote;
4153 /* If the transport is limited for parallellism, enforce that here.
4154 The hints DB entry is decremented in par_reduce(), when we reap the
4155 transport process. */
4157 if (tpt_parallel_check(tp, addr, &serialize_key))
4158 if ((panicmsg = expand_string_message))
4159 goto panic_continue;
4161 continue; /* Loop for the next set of addresses. */
4163 /* Set up the expansion variables for this set of addresses */
4165 deliver_set_expansions(addr);
4167 /* Ensure any transport-set auth info is fresh */
4168 addr->authenticator = addr->auth_id = addr->auth_sndr = NULL;
4170 /* Compute the return path, expanding a new one if required. The old one
4171 must be set first, as it might be referred to in the expansion. */
4173 if(addr->prop.errors_address)
4174 return_path = addr->prop.errors_address;
4175 #ifdef EXPERIMENTAL_SRS
4176 else if(addr->prop.srs_sender)
4177 return_path = addr->prop.srs_sender;
4180 return_path = sender_address;
4182 if (tp->return_path)
4184 uschar *new_return_path = expand_string(tp->return_path);
4185 if (new_return_path)
4186 return_path = new_return_path;
4187 else if (!expand_string_forcedfail)
4189 panicmsg = string_sprintf("Failed to expand return path \"%s\": %s",
4190 tp->return_path, expand_string_message);
4195 /* Find the uid, gid, and use_initgroups setting for this transport. Failure
4196 logs and sets up error messages, so we just post-process and continue with
4197 the next address. */
4199 if (!findugid(addr, tp, &uid, &gid, &use_initgroups))
4205 /* If this transport has a setup function, call it now so that it gets
4206 run in this process and not in any subprocess. That way, the results of
4207 any setup that are retained by the transport can be reusable. One of the
4208 things the setup does is to set the fallback host lists in the addresses.
4209 That is why it is called at this point, before the continue delivery
4210 processing, because that might use the fallback hosts. */
4213 (void)((tp->setup)(addr->transport, addr, NULL, uid, gid, NULL));
4215 /* If this is a run to continue delivery down an already-established
4216 channel, check that this set of addresses matches the transport and
4217 the channel. If it does not, defer the addresses. If a host list exists,
4218 we must check that the continue host is on the list. Otherwise, the
4219 host is set in the transport. */
4221 continue_more = FALSE; /* In case got set for the last lot */
4222 if (continue_transport)
4224 BOOL ok = Ustrcmp(continue_transport, tp->name) == 0;
4225 if (ok && addr->host_list)
4229 for (h = addr->host_list; h; h = h->next)
4230 if (Ustrcmp(h->name, continue_hostname) == 0)
4231 { ok = TRUE; break; }
4234 /* Addresses not suitable; defer or queue for fallback hosts (which
4235 might be the continue host) and skip to next address. */
4239 DEBUG(D_deliver) debug_printf("not suitable for continue_transport\n");
4240 if (serialize_key) enq_end(serialize_key);
4242 if (addr->fallback_hosts && !fallback)
4244 for (next = addr; ; next = next->next)
4246 next->host_list = next->fallback_hosts;
4247 DEBUG(D_deliver) debug_printf("%s queued for fallback host(s)\n", next->address);
4248 if (!next->next) break;
4250 next->next = addr_fallback;
4251 addr_fallback = addr;
4256 while (next->next) next = next->next;
4257 next->next = addr_defer;
4264 /* Set a flag indicating whether there are further addresses that list
4265 the continued host. This tells the transport to leave the channel open,
4266 but not to pass it to another delivery process. */
4268 for (next = addr_remote; next; next = next->next)
4271 for (h = next->host_list; h; h = h->next)
4272 if (Ustrcmp(h->name, continue_hostname) == 0)
4273 { continue_more = TRUE; break; }
4277 /* The transports set up the process info themselves as they may connect
4278 to more than one remote machine. They also have to set up the filter
4279 arguments, if required, so that the host name and address are available
4282 transport_filter_argv = NULL;
4284 /* Create the pipe for inter-process communication. If pipe creation
4285 fails, it is probably because the value of remote_max_parallel is so
4286 large that too many file descriptors for pipes have been created. Arrange
4287 to wait for a process to finish, and then try again. If we still can't
4288 create a pipe when all processes have finished, break the retry loop. */
4292 if (pipe(pfd) == 0) pipe_done = TRUE;
4293 else if (parcount > 0) parmax = parcount;
4296 /* We need to make the reading end of the pipe non-blocking. There are
4297 two different options for this. Exim is cunningly (I hope!) coded so
4298 that it can use either of them, though it prefers O_NONBLOCK, which
4299 distinguishes between EOF and no-more-data. */
4302 (void)fcntl(pfd[pipe_read], F_SETFL, O_NONBLOCK);
4304 (void)fcntl(pfd[pipe_read], F_SETFL, O_NDELAY);
4307 /* If the maximum number of subprocesses already exist, wait for a process
4308 to finish. If we ran out of file descriptors, parmax will have been reduced
4309 from its initial value of remote_max_parallel. */
4311 par_reduce(parmax - 1, fallback);
4314 /* If we failed to create a pipe and there were no processes to wait
4315 for, we have to give up on this one. Do this outside the above loop
4316 so that we can continue the main loop. */
4320 panicmsg = string_sprintf("unable to create pipe: %s", strerror(errno));
4324 /* Find a free slot in the pardata list. Must do this after the possible
4325 waiting for processes to finish, because a terminating process will free
4328 for (poffset = 0; poffset < remote_max_parallel; poffset++)
4329 if (parlist[poffset].pid == 0)
4332 /* If there isn't one, there has been a horrible disaster. */
4334 if (poffset >= remote_max_parallel)
4336 (void)close(pfd[pipe_write]);
4337 (void)close(pfd[pipe_read]);
4338 panicmsg = US"Unexpectedly no free subprocess slot";
4342 /* Now fork a subprocess to do the remote delivery, but before doing so,
4343 ensure that any cached resourses are released so as not to interfere with
4344 what happens in the subprocess. */
4348 if ((pid = fork()) == 0)
4350 int fd = pfd[pipe_write];
4353 /* Setting this global in the subprocess means we need never clear it */
4354 transport_name = tp->name;
4356 /* There are weird circumstances in which logging is disabled */
4357 disable_logging = tp->disable_logging;
4359 /* Show pids on debug output if parallelism possible */
4361 if (parmax > 1 && (parcount > 0 || addr_remote))
4363 DEBUG(D_any|D_v) debug_selector |= D_pid;
4364 DEBUG(D_deliver) debug_printf("Remote delivery process started\n");
4367 /* Reset the random number generator, so different processes don't all
4368 have the same sequence. In the test harness we want different, but
4369 predictable settings for each delivery process, so do something explicit
4370 here rather they rely on the fixed reset in the random number function. */
4372 random_seed = running_in_test_harness? 42 + 2*delivery_count : 0;
4374 /* Set close-on-exec on the pipe so that it doesn't get passed on to
4375 a new process that may be forked to do another delivery down the same
4378 (void)fcntl(fd, F_SETFD, fcntl(fd, F_GETFD) | FD_CLOEXEC);
4380 /* Close open file descriptors for the pipes of other processes
4381 that are running in parallel. */
4383 for (poffset = 0; poffset < remote_max_parallel; poffset++)
4384 if (parlist[poffset].pid != 0) (void)close(parlist[poffset].fd);
4386 /* This process has inherited a copy of the file descriptor
4387 for the data file, but its file pointer is shared with all the
4388 other processes running in parallel. Therefore, we have to re-open
4389 the file in order to get a new file descriptor with its own
4390 file pointer. We don't need to lock it, as the lock is held by
4391 the parent process. There doesn't seem to be any way of doing
4392 a dup-with-new-file-pointer. */
4394 (void)close(deliver_datafile);
4396 uschar * fname = spool_fname(US"input", message_subdir, message_id, US"-D");
4398 if ((deliver_datafile = Uopen(fname, O_RDWR | O_APPEND, 0)) < 0)
4399 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Failed to reopen %s for remote "
4400 "parallel delivery: %s", fname, strerror(errno));
4403 /* Set the close-on-exec flag */
4405 (void)fcntl(deliver_datafile, F_SETFD, fcntl(deliver_datafile, F_GETFD) |
4408 /* Set the uid/gid of this process; bombs out on failure. */
4410 exim_setugid(uid, gid, use_initgroups,
4411 string_sprintf("remote delivery to %s with transport=%s",
4412 addr->address, tp->name));
4414 /* Close the unwanted half of this process' pipe, set the process state,
4415 and run the transport. Afterwards, transport_count will contain the number
4416 of bytes written. */
4418 (void)close(pfd[pipe_read]);
4419 set_process_info("delivering %s using %s", message_id, tp->name);
4420 debug_print_string(tp->debug_string);
4421 if (!(tp->info->code)(addr->transport, addr)) replicate_status(addr);
4423 set_process_info("delivering %s (just run %s for %s%s in subprocess)",
4424 message_id, tp->name, addr->address, addr->next ? ", ..." : "");
4426 /* Ensure any cached resources that we used are now released */
4430 /* Pass the result back down the pipe. This is a lot more information
4431 than is needed for a local delivery. We have to send back the error
4432 status for each address, the usability status for each host that is
4433 flagged as unusable, and all the retry items. When TLS is in use, we
4434 send also the cipher and peerdn information. Each type of information
4435 is flagged by an identifying byte, and is then in a fixed format (with
4436 strings terminated by zeros), and there is a final terminator at the
4437 end. The host information and retry information is all attached to
4438 the first address, so that gets sent at the start. */
4440 /* Host unusability information: for most success cases this will
4443 for (h = addr->host_list; h; h = h->next)
4445 if (!h->address || h->status < hstatus_unusable) continue;
4446 sprintf(CS big_buffer, "%c%c%s", h->status, h->why, h->address);
4447 rmt_dlv_checked_write(fd, 'H', '0', big_buffer, Ustrlen(big_buffer+2) + 3);
4450 /* The number of bytes written. This is the same for each address. Even
4451 if we sent several copies of the message down the same connection, the
4452 size of each one is the same, and it's that value we have got because
4453 transport_count gets reset before calling transport_write_message(). */
4455 memcpy(big_buffer, &transport_count, sizeof(transport_count));
4456 rmt_dlv_checked_write(fd, 'S', '0', big_buffer, sizeof(transport_count));
4458 /* Information about what happened to each address. Four item types are
4459 used: an optional 'X' item first, for TLS information, then an optional "C"
4460 item for any client-auth info followed by 'R' items for any retry settings,
4461 and finally an 'A' item for the remaining data. */
4463 for(; addr; addr = addr->next)
4468 /* The certificate verification status goes into the flags */
4469 if (tls_out.certificate_verified) setflag(addr, af_cert_verified);
4470 #ifdef EXPERIMENTAL_DANE
4471 if (tls_out.dane_verified) setflag(addr, af_dane_verified);
4474 /* Use an X item only if there's something to send */
4478 ptr = big_buffer + sprintf(CS big_buffer, "%.128s", addr->cipher) + 1;
4483 ptr += sprintf(CS ptr, "%.512s", addr->peerdn);
4487 rmt_dlv_checked_write(fd, 'X', '1', big_buffer, ptr - big_buffer);
4492 if (!tls_export_cert(ptr, big_buffer_size-2, addr->peercert))
4496 rmt_dlv_checked_write(fd, 'X', '2', big_buffer, ptr - big_buffer);
4501 if (!tls_export_cert(ptr, big_buffer_size-2, addr->ourcert))
4505 rmt_dlv_checked_write(fd, 'X', '3', big_buffer, ptr - big_buffer);
4507 # ifndef DISABLE_OCSP
4508 if (addr->ocsp > OCSP_NOT_REQ)
4510 ptr = big_buffer + sprintf(CS big_buffer, "%c", addr->ocsp + '0') + 1;
4511 rmt_dlv_checked_write(fd, 'X', '4', big_buffer, ptr - big_buffer);
4514 #endif /*SUPPORT_TLS*/
4516 if (client_authenticator)
4518 ptr = big_buffer + sprintf(CS big_buffer, "%.64s", client_authenticator) + 1;
4519 rmt_dlv_checked_write(fd, 'C', '1', big_buffer, ptr - big_buffer);
4521 if (client_authenticated_id)
4523 ptr = big_buffer + sprintf(CS big_buffer, "%.64s", client_authenticated_id) + 1;
4524 rmt_dlv_checked_write(fd, 'C', '2', big_buffer, ptr - big_buffer);
4526 if (client_authenticated_sender)
4528 ptr = big_buffer + sprintf(CS big_buffer, "%.64s", client_authenticated_sender) + 1;
4529 rmt_dlv_checked_write(fd, 'C', '3', big_buffer, ptr - big_buffer);
4532 #ifndef DISABLE_PRDR
4533 if (addr->flags & af_prdr_used)
4534 rmt_dlv_checked_write(fd, 'P', '0', NULL, 0);
4537 if (addr->flags & af_chunking_used)
4538 rmt_dlv_checked_write(fd, 'K', '0', NULL, 0);
4540 memcpy(big_buffer, &addr->dsn_aware, sizeof(addr->dsn_aware));
4541 rmt_dlv_checked_write(fd, 'D', '0', big_buffer, sizeof(addr->dsn_aware));
4542 DEBUG(D_deliver) debug_printf("DSN write: addr->dsn_aware = %d\n", addr->dsn_aware);
4544 /* Retry information: for most success cases this will be null. */
4546 for (r = addr->retries; r; r = r->next)
4548 sprintf(CS big_buffer, "%c%.500s", r->flags, r->key);
4549 ptr = big_buffer + Ustrlen(big_buffer+2) + 3;
4550 memcpy(ptr, &(r->basic_errno), sizeof(r->basic_errno));
4551 ptr += sizeof(r->basic_errno);
4552 memcpy(ptr, &(r->more_errno), sizeof(r->more_errno));
4553 ptr += sizeof(r->more_errno);
4554 if (!r->message) *ptr++ = 0; else
4556 sprintf(CS ptr, "%.512s", r->message);
4559 rmt_dlv_checked_write(fd, 'R', '0', big_buffer, ptr - big_buffer);
4562 #ifdef SUPPORT_SOCKS
4563 if (LOGGING(proxy) && proxy_session)
4566 if (proxy_local_address)
4568 DEBUG(D_deliver) debug_printf("proxy_local_address '%s'\n", proxy_local_address);
4569 ptr = big_buffer + sprintf(CS ptr, "%.128s", proxy_local_address) + 1;
4570 DEBUG(D_deliver) debug_printf("proxy_local_port %d\n", proxy_local_port);
4571 memcpy(ptr, &proxy_local_port, sizeof(proxy_local_port));
4572 ptr += sizeof(proxy_local_port);
4576 rmt_dlv_checked_write(fd, 'A', '2', big_buffer, ptr - big_buffer);
4580 #ifdef EXPERIMENTAL_DSN_INFO
4581 /*um, are they really per-addr? Other per-conn stuff is not (auth, tls). But host_used is! */
4582 if (addr->smtp_greeting)
4584 DEBUG(D_deliver) debug_printf("smtp_greeting '%s'\n", addr->smtp_greeting);
4585 ptr = big_buffer + sprintf(CS big_buffer, "%.128s", addr->smtp_greeting) + 1;
4586 if (addr->helo_response)
4588 DEBUG(D_deliver) debug_printf("helo_response '%s'\n", addr->helo_response);
4589 ptr += sprintf(CS ptr, "%.128s", addr->helo_response) + 1;
4593 rmt_dlv_checked_write(fd, 'A', '1', big_buffer, ptr - big_buffer);
4597 /* The rest of the information goes in an 'A0' item. */
4599 sprintf(CS big_buffer, "%c%c", addr->transport_return, addr->special_action);
4600 ptr = big_buffer + 2;
4601 memcpy(ptr, &(addr->basic_errno), sizeof(addr->basic_errno));
4602 ptr += sizeof(addr->basic_errno);
4603 memcpy(ptr, &(addr->more_errno), sizeof(addr->more_errno));
4604 ptr += sizeof(addr->more_errno);
4605 memcpy(ptr, &(addr->flags), sizeof(addr->flags));
4606 ptr += sizeof(addr->flags);
4608 if (!addr->message) *ptr++ = 0; else
4609 ptr += sprintf(CS ptr, "%.1024s", addr->message) + 1;
4611 if (!addr->user_message) *ptr++ = 0; else
4612 ptr += sprintf(CS ptr, "%.1024s", addr->user_message) + 1;
4614 if (!addr->host_used) *ptr++ = 0; else
4616 ptr += sprintf(CS ptr, "%.256s", addr->host_used->name) + 1;
4617 ptr += sprintf(CS ptr, "%.64s", addr->host_used->address) + 1;
4618 memcpy(ptr, &(addr->host_used->port), sizeof(addr->host_used->port));
4619 ptr += sizeof(addr->host_used->port);
4621 /* DNS lookup status */
4622 *ptr++ = addr->host_used->dnssec==DS_YES ? '2'
4623 : addr->host_used->dnssec==DS_NO ? '1' : '0';
4626 rmt_dlv_checked_write(fd, 'A', '0', big_buffer, ptr - big_buffer);
4629 /* Local interface address/port */
4630 #ifdef EXPERIMENTAL_DSN_INFO
4631 if (sending_ip_address)
4633 if (LOGGING(incoming_interface) && sending_ip_address)
4637 ptr = big_buffer + sprintf(CS big_buffer, "%.128s", sending_ip_address) + 1;
4638 ptr += sprintf(CS ptr, "%d", sending_port) + 1;
4639 rmt_dlv_checked_write(fd, 'I', '0', big_buffer, ptr - big_buffer);
4642 /* Add termination flag, close the pipe, and that's it. The character
4643 after 'Z' indicates whether continue_transport is now NULL or not.
4644 A change from non-NULL to NULL indicates a problem with a continuing
4647 big_buffer[0] = continue_transport ? '1' : '0';
4648 rmt_dlv_checked_write(fd, 'Z', '0', big_buffer, 1);
4653 /* Back in the mainline: close the unwanted half of the pipe. */
4655 (void)close(pfd[pipe_write]);
4657 /* Fork failed; defer with error message */
4661 (void)close(pfd[pipe_read]);
4662 panicmsg = string_sprintf("fork failed for remote delivery to %s: %s",
4663 addr->domain, strerror(errno));
4667 /* Fork succeeded; increment the count, and remember relevant data for
4668 when the process finishes. */
4671 parlist[poffset].addrlist = parlist[poffset].addr = addr;
4672 parlist[poffset].pid = pid;
4673 parlist[poffset].fd = pfd[pipe_read];
4674 parlist[poffset].done = FALSE;
4675 parlist[poffset].msg = NULL;
4676 parlist[poffset].return_path = return_path;
4678 /* If the process we've just started is sending a message down an existing
4679 channel, wait for it now. This ensures that only one such process runs at
4680 once, whatever the value of remote_max parallel. Otherwise, we might try to
4681 send two or more messages simultaneously down the same channel. This could
4682 happen if there are different domains that include the same host in otherwise
4683 different host lists.
4685 Also, if the transport closes down the channel, this information gets back
4686 (continue_transport gets set to NULL) before we consider any other addresses
4689 if (continue_transport) par_reduce(0, fallback);
4691 /* Otherwise, if we are running in the test harness, wait a bit, to let the
4692 newly created process get going before we create another process. This should
4693 ensure repeatability in the tests. We only need to wait a tad. */
4695 else if (running_in_test_harness) millisleep(500);
4700 if (serialize_key) enq_end(serialize_key);
4702 remote_post_process(addr, LOG_MAIN|LOG_PANIC, panicmsg, fallback);
4706 /* Reached the end of the list of addresses. Wait for all the subprocesses that
4707 are still running and post-process their addresses. */
4709 par_reduce(0, fallback);
4716 /*************************************************
4717 * Split an address into local part and domain *
4718 *************************************************/
4720 /* This function initializes an address for routing by splitting it up into a
4721 local part and a domain. The local part is set up twice - once in its original
4722 casing, and once in lower case, and it is dequoted. We also do the "percent
4723 hack" for configured domains. This may lead to a DEFER result if a lookup
4724 defers. When a percent-hacking takes place, we insert a copy of the original
4725 address as a new parent of this address, as if we have had a redirection.
4728 addr points to an addr_item block containing the address
4731 DEFER - could not determine if domain is %-hackable
4735 deliver_split_address(address_item * addr)
4737 uschar * address = addr->address;
4742 if (!(domain = Ustrrchr(address, '@')))
4743 return DEFER; /* should always have a domain, but just in case... */
4745 len = domain - address;
4746 addr->domain = string_copylc(domain+1); /* Domains are always caseless */
4748 /* The implication in the RFCs (though I can't say I've seen it spelled out
4749 explicitly) is that quoting should be removed from local parts at the point
4750 where they are locally interpreted. [The new draft "821" is more explicit on
4751 this, Jan 1999.] We know the syntax is valid, so this can be done by simply
4752 removing quoting backslashes and any unquoted doublequotes. */
4754 t = addr->cc_local_part = store_get(len+1);
4758 if (c == '\"') continue;
4768 /* We do the percent hack only for those domains that are listed in
4769 percent_hack_domains. A loop is required, to copy with multiple %-hacks. */
4771 if (percent_hack_domains)
4774 uschar *new_address = NULL;
4775 uschar *local_part = addr->cc_local_part;
4777 deliver_domain = addr->domain; /* set $domain */
4779 while ( (rc = match_isinlist(deliver_domain, (const uschar **)&percent_hack_domains, 0,
4780 &domainlist_anchor, addr->domain_cache, MCL_DOMAIN, TRUE, NULL))
4782 && (t = Ustrrchr(local_part, '%')) != NULL
4785 new_address = string_copy(local_part);
4786 new_address[t - local_part] = '@';
4787 deliver_domain = string_copylc(t+1);
4788 local_part = string_copyn(local_part, t - local_part);
4791 if (rc == DEFER) return DEFER; /* lookup deferred */
4793 /* If hackery happened, set up new parent and alter the current address. */
4797 address_item *new_parent = store_get(sizeof(address_item));
4798 *new_parent = *addr;
4799 addr->parent = new_parent;
4800 addr->address = new_address;
4801 addr->unique = string_copy(new_address);
4802 addr->domain = deliver_domain;
4803 addr->cc_local_part = local_part;
4804 DEBUG(D_deliver) debug_printf("%%-hack changed address to: %s\n",
4809 /* Create the lowercased version of the final local part, and make that the
4810 default one to be used. */
4812 addr->local_part = addr->lc_local_part = string_copylc(addr->cc_local_part);
4819 /*************************************************
4820 * Get next error message text *
4821 *************************************************/
4823 /* If f is not NULL, read the next "paragraph", from a customized error message
4824 text file, terminated by a line containing ****, and expand it.
4827 f NULL or a file to read from
4828 which string indicating which string (for errors)
4830 Returns: NULL or an expanded string
4834 next_emf(FILE *f, uschar *which)
4838 uschar *para, *yield;
4841 if (!f) return NULL;
4843 if (!Ufgets(buffer, sizeof(buffer), f) || Ustrcmp(buffer, "****\n") == 0)
4846 para = store_get(size);
4849 para = string_cat(para, &size, &ptr, buffer);
4850 if (!Ufgets(buffer, sizeof(buffer), f) || Ustrcmp(buffer, "****\n") == 0)
4855 if ((yield = expand_string(para)))
4858 log_write(0, LOG_MAIN|LOG_PANIC, "Failed to expand string from "
4859 "bounce_message_file or warn_message_file (%s): %s", which,
4860 expand_string_message);
4867 /*************************************************
4868 * Close down a passed transport channel *
4869 *************************************************/
4871 /* This function is called when a passed transport channel cannot be used.
4872 It attempts to close it down tidily. The yield is always DELIVER_NOT_ATTEMPTED
4873 so that the function call can be the argument of a "return" statement.
4876 Returns: DELIVER_NOT_ATTEMPTED
4880 continue_closedown(void)
4882 if (continue_transport)
4884 transport_instance *t;
4885 for (t = transports; t; t = t->next)
4886 if (Ustrcmp(t->name, continue_transport) == 0)
4888 if (t->info->closedown) (t->info->closedown)(t);
4892 return DELIVER_NOT_ATTEMPTED;
4898 /*************************************************
4899 * Print address information *
4900 *************************************************/
4902 /* This function is called to output an address, or information about an
4903 address, for bounce or defer messages. If the hide_child flag is set, all we
4904 output is the original ancestor address.
4907 addr points to the address
4908 f the FILE to print to
4909 si an initial string
4910 sc a continuation string for before "generated"
4913 Returns: TRUE if the address is not hidden
4917 print_address_information(address_item *addr, FILE *f, uschar *si, uschar *sc,
4921 uschar *printed = US"";
4922 address_item *ancestor = addr;
4923 while (ancestor->parent) ancestor = ancestor->parent;
4925 fprintf(f, "%s", CS si);
4927 if (addr->parent && testflag(addr, af_hide_child))
4929 printed = US"an undisclosed address";
4932 else if (!testflag(addr, af_pfr) || !addr->parent)
4933 printed = addr->address;
4937 uschar *s = addr->address;
4940 if (addr->address[0] == '>') { ss = US"mail"; s++; }
4941 else if (addr->address[0] == '|') ss = US"pipe";
4944 fprintf(f, "%s to %s%sgenerated by ", ss, s, sc);
4945 printed = addr->parent->address;
4948 fprintf(f, "%s", CS string_printing(printed));
4950 if (ancestor != addr)
4952 uschar *original = ancestor->onetime_parent;
4953 if (!original) original= ancestor->address;
4954 if (strcmpic(original, printed) != 0)
4955 fprintf(f, "%s(%sgenerated from %s)", sc,
4956 ancestor != addr->parent ? "ultimately " : "",
4957 string_printing(original));
4960 if (addr->host_used)
4961 fprintf(f, "\n host %s [%s]",
4962 addr->host_used->name, addr->host_used->address);
4964 fprintf(f, "%s", CS se);
4972 /*************************************************
4973 * Print error for an address *
4974 *************************************************/
4976 /* This function is called to print the error information out of an address for
4977 a bounce or a warning message. It tries to format the message reasonably by
4978 introducing newlines. All lines are indented by 4; the initial printing
4979 position must be set before calling.
4981 This function used always to print the error. Nowadays we want to restrict it
4982 to cases such as LMTP/SMTP errors from a remote host, and errors from :fail:
4983 and filter "fail". We no longer pass other information willy-nilly in bounce
4984 and warning messages. Text in user_message is always output; text in message
4985 only if the af_pass_message flag is set.
4989 f the FILE to print on
4996 print_address_error(address_item *addr, FILE *f, uschar *t)
4998 int count = Ustrlen(t);
4999 uschar *s = testflag(addr, af_pass_message)? addr->message : NULL;
5001 if (!s && !(s = addr->user_message))
5004 fprintf(f, "\n %s", t);
5007 if (*s == '\\' && s[1] == 'n')
5017 if (*s++ == ':' && isspace(*s) && count > 45)
5019 fprintf(f, "\n "); /* sic (because space follows) */
5026 /***********************************************************
5027 * Print Diagnostic-Code for an address *
5028 ************************************************************/
5030 /* This function is called to print the error information out of an address for
5031 a bounce or a warning message. It tries to format the message reasonably as
5032 required by RFC 3461 by adding a space after each newline
5034 it uses the same logic as print_address_error() above. if af_pass_message is true
5035 and addr->message is set it uses the remote host answer. if not addr->user_message
5036 is used instead if available.
5040 f the FILE to print on
5046 print_dsn_diagnostic_code(const address_item *addr, FILE *f)
5048 uschar *s = testflag(addr, af_pass_message) ? addr->message : NULL;
5050 /* af_pass_message and addr->message set ? print remote host answer */
5054 debug_printf("DSN Diagnostic-Code: addr->message = %s\n", addr->message);
5056 /* search first ": ". we assume to find the remote-MTA answer there */
5057 if (!(s = Ustrstr(addr->message, ": ")))
5058 return; /* not found, bail out */
5059 s += 2; /* skip ": " */
5060 fprintf(f, "Diagnostic-Code: smtp; ");
5062 /* no message available. do nothing */
5066 if (*s == '\\' && s[1] == 'n')
5068 fputs("\n ", f); /* as defined in RFC 3461 */
5078 /*************************************************
5079 * Check list of addresses for duplication *
5080 *************************************************/
5082 /* This function was introduced when the test for duplicate addresses that are
5083 not pipes, files, or autoreplies was moved from the middle of routing to when
5084 routing was complete. That was to fix obscure cases when the routing history
5085 affects the subsequent routing of identical addresses. This function is called
5086 after routing, to check that the final routed addresses are not duplicates.
5088 If we detect a duplicate, we remember what it is a duplicate of. Note that
5089 pipe, file, and autoreply de-duplication is handled during routing, so we must
5090 leave such "addresses" alone here, as otherwise they will incorrectly be
5093 Argument: address of list anchor
5098 do_duplicate_check(address_item **anchor)
5101 while ((addr = *anchor))
5104 if (testflag(addr, af_pfr))
5106 anchor = &(addr->next);
5108 else if ((tnode = tree_search(tree_duplicates, addr->unique)))
5110 DEBUG(D_deliver|D_route)
5111 debug_printf("%s is a duplicate address: discarded\n", addr->unique);
5112 *anchor = addr->next;
5113 addr->dupof = tnode->data.ptr;
5114 addr->next = addr_duplicate;
5115 addr_duplicate = addr;
5119 tree_add_duplicate(addr->unique, addr);
5120 anchor = &(addr->next);
5128 /*************************************************
5129 * Deliver one message *
5130 *************************************************/
5132 /* This is the function which is called when a message is to be delivered. It
5133 is passed the id of the message. It is possible that the message no longer
5134 exists, if some other process has delivered it, and it is also possible that
5135 the message is being worked on by another process, in which case the data file
5138 If no delivery is attempted for any of the above reasons, the function returns
5139 DELIVER_NOT_ATTEMPTED.
5141 If the give_up flag is set true, do not attempt any deliveries, but instead
5142 fail all outstanding addresses and return the message to the sender (or
5145 A delivery operation has a process all to itself; we never deliver more than
5146 one message in the same process. Therefore we needn't worry too much about
5150 id the id of the message to be delivered
5151 forced TRUE if delivery was forced by an administrator; this overrides
5152 retry delays and causes a delivery to be tried regardless
5153 give_up TRUE if an administrator has requested that delivery attempts
5156 Returns: When the global variable mua_wrapper is FALSE:
5157 DELIVER_ATTEMPTED_NORMAL if a delivery attempt was made
5158 DELIVER_NOT_ATTEMPTED otherwise (see comment above)
5159 When the global variable mua_wrapper is TRUE:
5160 DELIVER_MUA_SUCCEEDED if delivery succeeded
5161 DELIVER_MUA_FAILED if delivery failed
5162 DELIVER_NOT_ATTEMPTED if not attempted (should not occur)
5166 deliver_message(uschar *id, BOOL forced, BOOL give_up)
5169 int final_yield = DELIVER_ATTEMPTED_NORMAL;
5170 time_t now = time(NULL);
5171 address_item *addr_last = NULL;
5172 uschar *filter_message = NULL;
5174 int process_recipients = RECIP_ACCEPT;
5177 extern int acl_where;
5179 uschar *info = queue_run_pid == (pid_t)0
5180 ? string_sprintf("delivering %s", id)
5181 : string_sprintf("delivering %s (queue run pid %d)", id, queue_run_pid);
5183 /* If the D_process_info bit is on, set_process_info() will output debugging
5184 information. If not, we want to show this initial information if D_deliver or
5185 D_queue_run is set or in verbose mode. */
5187 set_process_info("%s", info);
5189 if ( !(debug_selector & D_process_info)
5190 && (debug_selector & (D_deliver|D_queue_run|D_v))
5192 debug_printf("%s\n", info);
5194 /* Ensure that we catch any subprocesses that are created. Although Exim
5195 sets SIG_DFL as its initial default, some routes through the code end up
5196 here with it set to SIG_IGN - cases where a non-synchronous delivery process
5197 has been forked, but no re-exec has been done. We use sigaction rather than
5198 plain signal() on those OS where SA_NOCLDWAIT exists, because we want to be
5199 sure it is turned off. (There was a problem on AIX with this.) */
5203 struct sigaction act;
5204 act.sa_handler = SIG_DFL;
5205 sigemptyset(&(act.sa_mask));
5207 sigaction(SIGCHLD, &act, NULL);
5210 signal(SIGCHLD, SIG_DFL);
5213 /* Make the forcing flag available for routers and transports, set up the
5214 global message id field, and initialize the count for returned files and the
5215 message size. This use of strcpy() is OK because the length id is checked when
5216 it is obtained from a command line (the -M or -q options), and otherwise it is
5217 known to be a valid message id. */
5219 Ustrcpy(message_id, id);
5220 deliver_force = forced;
5224 /* Initialize some flags */
5226 update_spool = FALSE;
5227 remove_journal = TRUE;
5229 /* Set a known context for any ACLs we call via expansions */
5230 acl_where = ACL_WHERE_DELIVERY;
5232 /* Reset the random number generator, so that if several delivery processes are
5233 started from a queue runner that has already used random numbers (for sorting),
5234 they don't all get the same sequence. */
5238 /* Open and lock the message's data file. Exim locks on this one because the
5239 header file may get replaced as it is re-written during the delivery process.
5240 Any failures cause messages to be written to the log, except for missing files
5241 while queue running - another process probably completed delivery. As part of
5242 opening the data file, message_subdir gets set. */
5244 if ((deliver_datafile = spool_open_datafile(id)) < 0)
5245 return continue_closedown(); /* yields DELIVER_NOT_ATTEMPTED */
5247 /* The value of message_size at this point has been set to the data length,
5248 plus one for the blank line that notionally precedes the data. */
5250 /* Now read the contents of the header file, which will set up the headers in
5251 store, and also the list of recipients and the tree of non-recipients and
5252 assorted flags. It updates message_size. If there is a reading or format error,
5253 give up; if the message has been around for sufficiently long, remove it. */
5256 uschar * spoolname = string_sprintf("%s-H", id);
5257 if ((rc = spool_read_header(spoolname, TRUE, TRUE)) != spool_read_OK)
5259 if (errno == ERRNO_SPOOLFORMAT)
5261 struct stat statbuf;
5262 if (Ustat(spool_fname(US"input", message_subdir, spoolname, US""),
5264 log_write(0, LOG_MAIN, "Format error in spool file %s: "
5265 "size=" OFF_T_FMT, spoolname, statbuf.st_size);
5267 log_write(0, LOG_MAIN, "Format error in spool file %s", spoolname);
5270 log_write(0, LOG_MAIN, "Error reading spool file %s: %s", spoolname,
5273 /* If we managed to read the envelope data, received_time contains the
5274 time the message was received. Otherwise, we can calculate it from the
5277 if (rc != spool_read_hdrerror)
5280 for (i = 0; i < 6; i++)
5281 received_time = received_time * BASE_62 + tab62[id[i] - '0'];
5284 /* If we've had this malformed message too long, sling it. */
5286 if (now - received_time > keep_malformed)
5288 Uunlink(spool_fname(US"msglog", message_subdir, id, US""));
5289 Uunlink(spool_fname(US"input", message_subdir, id, US"-D"));
5290 Uunlink(spool_fname(US"input", message_subdir, id, US"-H"));
5291 Uunlink(spool_fname(US"input", message_subdir, id, US"-J"));
5292 log_write(0, LOG_MAIN, "Message removed because older than %s",
5293 readconf_printtime(keep_malformed));
5296 (void)close(deliver_datafile);
5297 deliver_datafile = -1;
5298 return continue_closedown(); /* yields DELIVER_NOT_ATTEMPTED */
5302 /* The spool header file has been read. Look to see if there is an existing
5303 journal file for this message. If there is, it means that a previous delivery
5304 attempt crashed (program or host) before it could update the spool header file.
5305 Read the list of delivered addresses from the journal and add them to the
5306 nonrecipients tree. Then update the spool file. We can leave the journal in
5307 existence, as it will get further successful deliveries added to it in this
5308 run, and it will be deleted if this function gets to its end successfully.
5309 Otherwise it might be needed again. */
5312 uschar * fname = spool_fname(US"input", message_subdir, id, US"-J");
5314 if ((jread = Ufopen(fname, "rb")))
5316 while (Ufgets(big_buffer, big_buffer_size, jread))
5318 int n = Ustrlen(big_buffer);
5319 big_buffer[n-1] = 0;
5320 tree_add_nonrecipient(big_buffer);
5321 DEBUG(D_deliver) debug_printf("Previously delivered address %s taken from "
5322 "journal file\n", big_buffer);
5324 (void)fclose(jread);
5325 /* Panic-dies on error */
5326 (void)spool_write_header(message_id, SW_DELIVERING, NULL);
5328 else if (errno != ENOENT)
5330 log_write(0, LOG_MAIN|LOG_PANIC, "attempt to open journal for reading gave: "
5331 "%s", strerror(errno));
5332 return continue_closedown(); /* yields DELIVER_NOT_ATTEMPTED */
5335 /* A null recipients list indicates some kind of disaster. */
5337 if (!recipients_list)
5339 (void)close(deliver_datafile);
5340 deliver_datafile = -1;
5341 log_write(0, LOG_MAIN, "Spool error: no recipients for %s", fname);
5342 return continue_closedown(); /* yields DELIVER_NOT_ATTEMPTED */
5347 /* Handle a message that is frozen. There are a number of different things that
5348 can happen, but in the default situation, unless forced, no delivery is
5353 #ifdef SUPPORT_MOVE_FROZEN_MESSAGES
5354 /* Moving to another directory removes the message from Exim's view. Other
5355 tools must be used to deal with it. Logging of this action happens in
5356 spool_move_message() and its subfunctions. */
5358 if ( move_frozen_messages
5359 && spool_move_message(id, message_subdir, US"", US"F")
5361 return continue_closedown(); /* yields DELIVER_NOT_ATTEMPTED */
5364 /* For all frozen messages (bounces or not), timeout_frozen_after sets the
5365 maximum time to keep messages that are frozen. Thaw if we reach it, with a
5366 flag causing all recipients to be failed. The time is the age of the
5367 message, not the time since freezing. */
5369 if (timeout_frozen_after > 0 && message_age >= timeout_frozen_after)
5371 log_write(0, LOG_MAIN, "cancelled by timeout_frozen_after");
5372 process_recipients = RECIP_FAIL_TIMEOUT;
5375 /* For bounce messages (and others with no sender), thaw if the error message
5376 ignore timer is exceeded. The message will be discarded if this delivery
5379 else if (sender_address[0] == 0 && message_age >= ignore_bounce_errors_after)
5381 log_write(0, LOG_MAIN, "Unfrozen by errmsg timer");
5384 /* If this is a bounce message, or there's no auto thaw, or we haven't
5385 reached the auto thaw time yet, and this delivery is not forced by an admin
5386 user, do not attempt delivery of this message. Note that forced is set for
5387 continuing messages down the same channel, in order to skip load checking and
5388 ignore hold domains, but we don't want unfreezing in that case. */
5392 if ( ( sender_address[0] == 0
5394 || now <= deliver_frozen_at + auto_thaw
5396 && ( !forced || !deliver_force_thaw
5397 || !admin_user || continue_hostname
5400 (void)close(deliver_datafile);
5401 deliver_datafile = -1;
5402 log_write(L_skip_delivery, LOG_MAIN, "Message is frozen");
5403 return continue_closedown(); /* yields DELIVER_NOT_ATTEMPTED */
5406 /* If delivery was forced (by an admin user), assume a manual thaw.
5407 Otherwise it's an auto thaw. */
5411 deliver_manual_thaw = TRUE;
5412 log_write(0, LOG_MAIN, "Unfrozen by forced delivery");
5414 else log_write(0, LOG_MAIN, "Unfrozen by auto-thaw");
5417 /* We get here if any of the rules for unfreezing have triggered. */
5419 deliver_freeze = FALSE;
5420 update_spool = TRUE;
5424 /* Open the message log file if we are using them. This records details of
5425 deliveries, deferments, and failures for the benefit of the mail administrator.
5426 The log is not used by exim itself to track the progress of a message; that is
5427 done by rewriting the header spool file. */
5431 uschar * fname = spool_fname(US"msglog", message_subdir, id, US"");
5435 if ((fd = open_msglog_file(fname, SPOOL_MODE, &error)) < 0)
5437 log_write(0, LOG_MAIN|LOG_PANIC, "Couldn't %s message log %s: %s", error,
5438 fname, strerror(errno));
5439 return continue_closedown(); /* yields DELIVER_NOT_ATTEMPTED */
5442 /* Make a C stream out of it. */
5444 if (!(message_log = fdopen(fd, "a")))
5446 log_write(0, LOG_MAIN|LOG_PANIC, "Couldn't fdopen message log %s: %s",
5447 fname, strerror(errno));
5448 return continue_closedown(); /* yields DELIVER_NOT_ATTEMPTED */
5453 /* If asked to give up on a message, log who did it, and set the action for all
5458 struct passwd *pw = getpwuid(real_uid);
5459 log_write(0, LOG_MAIN, "cancelled by %s",
5460 pw ? US pw->pw_name : string_sprintf("uid %ld", (long int)real_uid));
5461 process_recipients = RECIP_FAIL;
5464 /* Otherwise, if there are too many Received: headers, fail all recipients. */
5466 else if (received_count > received_headers_max)
5467 process_recipients = RECIP_FAIL_LOOP;
5469 /* Otherwise, if a system-wide, address-independent message filter is
5470 specified, run it now, except in the case when we are failing all recipients as
5471 a result of timeout_frozen_after. If the system filter yields "delivered", then
5472 ignore the true recipients of the message. Failure of the filter file is
5473 logged, and the delivery attempt fails. */
5475 else if (system_filter && process_recipients != RECIP_FAIL_TIMEOUT)
5480 redirect_block redirect;
5482 if (system_filter_uid_set)
5484 ugid.uid = system_filter_uid;
5485 ugid.gid = system_filter_gid;
5486 ugid.uid_set = ugid.gid_set = TRUE;
5490 ugid.uid_set = ugid.gid_set = FALSE;
5493 return_path = sender_address;
5494 enable_dollar_recipients = TRUE; /* Permit $recipients in system filter */
5495 system_filtering = TRUE;
5497 /* Any error in the filter file causes a delivery to be abandoned. */
5499 redirect.string = system_filter;
5500 redirect.isfile = TRUE;
5501 redirect.check_owner = redirect.check_group = FALSE;
5502 redirect.owners = NULL;
5503 redirect.owngroups = NULL;
5505 redirect.modemask = 0;
5507 DEBUG(D_deliver|D_filter) debug_printf("running system filter\n");
5510 &redirect, /* Where the data is */
5511 RDO_DEFER | /* Turn on all the enabling options */
5512 RDO_FAIL | /* Leave off all the disabling options */
5517 NULL, /* No :include: restriction (not used in filter) */
5518 NULL, /* No sieve vacation directory (not sieve!) */
5519 NULL, /* No sieve enotify mailto owner (not sieve!) */
5520 NULL, /* No sieve user address (not sieve!) */
5521 NULL, /* No sieve subaddress (not sieve!) */
5522 &ugid, /* uid/gid data */
5523 &addr_new, /* Where to hang generated addresses */
5524 &filter_message, /* Where to put error message */
5525 NULL, /* Don't skip syntax errors */
5526 &filtertype, /* Will always be set to FILTER_EXIM for this call */
5527 US"system filter"); /* For error messages */
5529 DEBUG(D_deliver|D_filter) debug_printf("system filter returned %d\n", rc);
5531 if (rc == FF_ERROR || rc == FF_NONEXIST)
5533 (void)close(deliver_datafile);
5534 deliver_datafile = -1;
5535 log_write(0, LOG_MAIN|LOG_PANIC, "Error in system filter: %s",
5536 string_printing(filter_message));
5537 return continue_closedown(); /* yields DELIVER_NOT_ATTEMPTED */
5540 /* Reset things. If the filter message is an empty string, which can happen
5541 for a filter "fail" or "freeze" command with no text, reset it to NULL. */
5543 system_filtering = FALSE;
5544 enable_dollar_recipients = FALSE;
5545 if (filter_message && filter_message[0] == 0) filter_message = NULL;
5547 /* Save the values of the system filter variables so that user filters
5550 memcpy(filter_sn, filter_n, sizeof(filter_sn));
5552 /* The filter can request that delivery of the original addresses be
5557 process_recipients = RECIP_DEFER;
5558 deliver_msglog("Delivery deferred by system filter\n");
5559 log_write(0, LOG_MAIN, "Delivery deferred by system filter");
5562 /* The filter can request that a message be frozen, but this does not
5563 take place if the message has been manually thawed. In that case, we must
5564 unset "delivered", which is forced by the "freeze" command to make -bF
5567 else if (rc == FF_FREEZE && !deliver_manual_thaw)
5569 deliver_freeze = TRUE;
5570 deliver_frozen_at = time(NULL);
5571 process_recipients = RECIP_DEFER;
5572 frozen_info = string_sprintf(" by the system filter%s%s",
5573 filter_message ? US": " : US"",
5574 filter_message ? filter_message : US"");
5577 /* The filter can request that a message be failed. The error message may be
5578 quite long - it is sent back to the sender in the bounce - but we don't want
5579 to fill up the log with repetitions of it. If it starts with << then the text
5580 between << and >> is written to the log, with the rest left for the bounce
5583 else if (rc == FF_FAIL)
5585 uschar *colon = US"";
5586 uschar *logmsg = US"";
5589 process_recipients = RECIP_FAIL_FILTER;
5595 if ( filter_message[0] == '<'
5596 && filter_message[1] == '<'
5597 && (logend = Ustrstr(filter_message, ">>"))
5600 logmsg = filter_message + 2;
5601 loglen = logend - logmsg;
5602 filter_message = logend + 2;
5603 if (filter_message[0] == 0) filter_message = NULL;
5607 logmsg = filter_message;
5608 loglen = Ustrlen(filter_message);
5612 log_write(0, LOG_MAIN, "cancelled by system filter%s%.*s", colon, loglen,
5616 /* Delivery can be restricted only to those recipients (if any) that the
5617 filter specified. */
5619 else if (rc == FF_DELIVERED)
5621 process_recipients = RECIP_IGNORE;
5623 log_write(0, LOG_MAIN, "original recipients ignored (system filter)");
5625 log_write(0, LOG_MAIN, "=> discarded (system filter)");
5628 /* If any new addresses were created by the filter, fake up a "parent"
5629 for them. This is necessary for pipes, etc., which are expected to have
5630 parents, and it also gives some sensible logging for others. Allow
5631 pipes, files, and autoreplies, and run them as the filter uid if set,
5632 otherwise as the current uid. */
5636 int uid = (system_filter_uid_set)? system_filter_uid : geteuid();
5637 int gid = (system_filter_gid_set)? system_filter_gid : getegid();
5639 /* The text "system-filter" is tested in transport_set_up_command() and in
5640 set_up_shell_command() in the pipe transport, to enable them to permit
5641 $recipients, so don't change it here without also changing it there. */
5643 address_item *p = addr_new;
5644 address_item *parent = deliver_make_addr(US"system-filter", FALSE);
5646 parent->domain = string_copylc(qualify_domain_recipient);
5647 parent->local_part = US"system-filter";
5649 /* As part of this loop, we arrange for addr_last to end up pointing
5650 at the final address. This is used if we go on to add addresses for the
5651 original recipients. */
5655 if (parent->child_count == SHRT_MAX)
5656 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "system filter generated more "
5657 "than %d delivery addresses", SHRT_MAX);
5658 parent->child_count++;
5661 if (testflag(p, af_pfr))
5667 setflag(p, af_uid_set |
5673 /* Find the name of the system filter's appropriate pfr transport */
5675 if (p->address[0] == '|')
5678 tpname = system_filter_pipe_transport;
5679 address_pipe = p->address;
5681 else if (p->address[0] == '>')
5684 tpname = system_filter_reply_transport;
5688 if (p->address[Ustrlen(p->address)-1] == '/')
5690 type = US"directory";
5691 tpname = system_filter_directory_transport;
5696 tpname = system_filter_file_transport;
5698 address_file = p->address;
5701 /* Now find the actual transport, first expanding the name. We have
5702 set address_file or address_pipe above. */
5706 uschar *tmp = expand_string(tpname);
5707 address_file = address_pipe = NULL;
5709 p->message = string_sprintf("failed to expand \"%s\" as a "
5710 "system filter transport name", tpname);
5715 p->message = string_sprintf("system_filter_%s_transport is unset",
5721 transport_instance *tp;
5722 for (tp = transports; tp; tp = tp->next)
5724 if (Ustrcmp(tp->name, tpname) == 0)
5731 p->message = string_sprintf("failed to find \"%s\" transport "
5732 "for system filter delivery", tpname);
5735 /* If we couldn't set up a transport, defer the delivery, putting the
5736 error on the panic log as well as the main log. */
5740 address_item *badp = p;
5742 if (!addr_last) addr_new = p; else addr_last->next = p;
5743 badp->local_part = badp->address; /* Needed for log line */
5744 post_process_one(badp, DEFER, LOG_MAIN|LOG_PANIC, DTYPE_ROUTER, 0);
5747 } /* End of pfr handling */
5749 /* Either a non-pfr delivery, or we found a transport */
5751 DEBUG(D_deliver|D_filter)
5752 debug_printf("system filter added %s\n", p->address);
5756 } /* Loop through all addr_new addresses */
5761 /* Scan the recipients list, and for every one that is not in the non-
5762 recipients tree, add an addr item to the chain of new addresses. If the pno
5763 value is non-negative, we must set the onetime parent from it. This which
5764 points to the relevant entry in the recipients list.
5766 This processing can be altered by the setting of the process_recipients
5767 variable, which is changed if recipients are to be ignored, failed, or
5768 deferred. This can happen as a result of system filter activity, or if the -Mg
5769 option is used to fail all of them.
5771 Duplicate addresses are handled later by a different tree structure; we can't
5772 just extend the non-recipients tree, because that will be re-written to the
5773 spool if the message is deferred, and in any case there are casing
5774 complications for local addresses. */
5776 if (process_recipients != RECIP_IGNORE)
5778 for (i = 0; i < recipients_count; i++)
5780 if (!tree_search(tree_nonrecipients, recipients_list[i].address))
5782 recipient_item *r = recipients_list + i;
5783 address_item *new = deliver_make_addr(r->address, FALSE);
5784 new->prop.errors_address = r->errors_to;
5786 if ((new->prop.utf8_msg = message_smtputf8))
5788 new->prop.utf8_downcvt = message_utf8_downconvert == 1;
5789 new->prop.utf8_downcvt_maybe = message_utf8_downconvert == -1;
5790 DEBUG(D_deliver) debug_printf("utf8, downconvert %s\n",
5791 new->prop.utf8_downcvt ? "yes"
5792 : new->prop.utf8_downcvt_maybe ? "ifneeded"
5798 new->onetime_parent = recipients_list[r->pno].address;
5800 /* If DSN support is enabled, set the dsn flags and the original receipt
5801 to be passed on to other DSN enabled MTAs */
5802 new->dsn_flags = r->dsn_flags & rf_dsnflags;
5803 new->dsn_orcpt = r->orcpt;
5804 DEBUG(D_deliver) debug_printf("DSN: set orcpt: %s flags: %d\n",
5805 new->dsn_orcpt, new->dsn_flags);
5807 switch (process_recipients)
5809 /* RECIP_DEFER is set when a system filter freezes a message. */
5812 new->next = addr_defer;
5817 /* RECIP_FAIL_FILTER is set when a system filter has obeyed a "fail"
5820 case RECIP_FAIL_FILTER:
5822 filter_message ? filter_message : US"delivery cancelled";
5823 setflag(new, af_pass_message);
5824 goto RECIP_QUEUE_FAILED; /* below */
5827 /* RECIP_FAIL_TIMEOUT is set when a message is frozen, but is older
5828 than the value in timeout_frozen_after. Treat non-bounce messages
5829 similarly to -Mg; for bounce messages we just want to discard, so
5830 don't put the address on the failed list. The timeout has already
5833 case RECIP_FAIL_TIMEOUT:
5834 new->message = US"delivery cancelled; message timed out";
5835 goto RECIP_QUEUE_FAILED; /* below */
5838 /* RECIP_FAIL is set when -Mg has been used. */
5841 new->message = US"delivery cancelled by administrator";
5844 /* Common code for the failure cases above. If this is not a bounce
5845 message, put the address on the failed list so that it is used to
5846 create a bounce. Otherwise do nothing - this just discards the address.
5847 The incident has already been logged. */
5850 if (sender_address[0] != 0)
5852 new->next = addr_failed;
5858 /* RECIP_FAIL_LOOP is set when there are too many Received: headers
5859 in the message. Process each address as a routing failure; if this
5860 is a bounce message, it will get frozen. */
5862 case RECIP_FAIL_LOOP:
5863 new->message = US"Too many \"Received\" headers - suspected mail loop";
5864 post_process_one(new, FAIL, LOG_MAIN, DTYPE_ROUTER, 0);
5868 /* Value should be RECIP_ACCEPT; take this as the safe default. */
5871 if (!addr_new) addr_new = new; else addr_last->next = new;
5876 #ifndef DISABLE_EVENT
5877 if (process_recipients != RECIP_ACCEPT)
5879 uschar * save_local = deliver_localpart;
5880 const uschar * save_domain = deliver_domain;
5882 deliver_localpart = expand_string(
5883 string_sprintf("${local_part:%s}", new->address));
5884 deliver_domain = expand_string(
5885 string_sprintf("${domain:%s}", new->address));
5887 (void) event_raise(event_action,
5888 US"msg:fail:internal", new->message);
5890 deliver_localpart = save_local;
5891 deliver_domain = save_domain;
5901 debug_printf("Delivery address list:\n");
5902 for (p = addr_new; p; p = p->next)
5903 debug_printf(" %s %s\n", p->address,
5904 p->onetime_parent ? p->onetime_parent : US"");
5907 /* Set up the buffers used for copying over the file when delivering. */
5909 deliver_in_buffer = store_malloc(DELIVER_IN_BUFFER_SIZE);
5910 deliver_out_buffer = store_malloc(DELIVER_OUT_BUFFER_SIZE);
5914 /* Until there are no more new addresses, handle each one as follows:
5916 . If this is a generated address (indicated by the presence of a parent
5917 pointer) then check to see whether it is a pipe, file, or autoreply, and
5918 if so, handle it directly here. The router that produced the address will
5919 have set the allow flags into the address, and also set the uid/gid required.
5920 Having the routers generate new addresses and then checking them here at
5921 the outer level is tidier than making each router do the checking, and
5922 means that routers don't need access to the failed address queue.
5924 . Break up the address into local part and domain, and make lowercased
5925 versions of these strings. We also make unquoted versions of the local part.
5927 . Handle the percent hack for those domains for which it is valid.
5929 . For child addresses, determine if any of the parents have the same address.
5930 If so, generate a different string for previous delivery checking. Without
5931 this code, if the address spqr generates spqr via a forward or alias file,
5932 delivery of the generated spqr stops further attempts at the top level spqr,
5933 which is not what is wanted - it may have generated other addresses.
5935 . Check on the retry database to see if routing was previously deferred, but
5936 only if in a queue run. Addresses that are to be routed are put on the
5937 addr_route chain. Addresses that are to be deferred are put on the
5938 addr_defer chain. We do all the checking first, so as not to keep the
5939 retry database open any longer than necessary.
5941 . Now we run the addresses through the routers. A router may put the address
5942 on either the addr_local or the addr_remote chain for local or remote
5943 delivery, respectively, or put it on the addr_failed chain if it is
5944 undeliveable, or it may generate child addresses and put them on the
5945 addr_new chain, or it may defer an address. All the chain anchors are
5946 passed as arguments so that the routers can be called for verification
5949 . If new addresses have been generated by the routers, da capo.
5952 header_rewritten = FALSE; /* No headers rewritten yet */
5953 while (addr_new) /* Loop until all addresses dealt with */
5955 address_item *addr, *parent;
5957 /* Failure to open the retry database is treated the same as if it does
5958 not exist. In both cases, dbm_file is NULL. */
5960 if (!(dbm_file = dbfn_open(US"retry", O_RDONLY, &dbblock, FALSE)))
5962 DEBUG(D_deliver|D_retry|D_route|D_hints_lookup)
5963 debug_printf("no retry data available\n");
5966 /* Scan the current batch of new addresses, to handle pipes, files and
5967 autoreplies, and determine which others are ready for routing. */
5974 dbdata_retry *domain_retry_record;
5975 dbdata_retry *address_retry_record;
5978 addr_new = addr->next;
5980 DEBUG(D_deliver|D_retry|D_route)
5982 debug_printf(">>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>\n");
5983 debug_printf("Considering: %s\n", addr->address);
5986 /* Handle generated address that is a pipe or a file or an autoreply. */
5988 if (testflag(addr, af_pfr))
5990 /* If an autoreply in a filter could not generate a syntactically valid
5991 address, give up forthwith. Set af_ignore_error so that we don't try to
5992 generate a bounce. */
5994 if (testflag(addr, af_bad_reply))
5996 addr->basic_errno = ERRNO_BADADDRESS2;
5997 addr->local_part = addr->address;
5999 US"filter autoreply generated syntactically invalid recipient";
6000 setflag(addr, af_ignore_error);
6001 (void)post_process_one(addr, FAIL, LOG_MAIN, DTYPE_ROUTER, 0);
6002 continue; /* with the next new address */
6005 /* If two different users specify delivery to the same pipe or file or
6006 autoreply, there should be two different deliveries, so build a unique
6007 string that incorporates the original address, and use this for
6008 duplicate testing and recording delivery, and also for retrying. */
6011 string_sprintf("%s:%s", addr->address, addr->parent->unique +
6012 (testflag(addr->parent, af_homonym)? 3:0));
6014 addr->address_retry_key = addr->domain_retry_key =
6015 string_sprintf("T:%s", addr->unique);
6017 /* If a filter file specifies two deliveries to the same pipe or file,
6018 we want to de-duplicate, but this is probably not wanted for two mail
6019 commands to the same address, where probably both should be delivered.
6020 So, we have to invent a different unique string in that case. Just
6021 keep piling '>' characters on the front. */
6023 if (addr->address[0] == '>')
6025 while (tree_search(tree_duplicates, addr->unique))
6026 addr->unique = string_sprintf(">%s", addr->unique);
6029 else if ((tnode = tree_search(tree_duplicates, addr->unique)))
6031 DEBUG(D_deliver|D_route)
6032 debug_printf("%s is a duplicate address: discarded\n", addr->address);
6033 addr->dupof = tnode->data.ptr;
6034 addr->next = addr_duplicate;
6035 addr_duplicate = addr;
6039 DEBUG(D_deliver|D_route) debug_printf("unique = %s\n", addr->unique);
6041 /* Check for previous delivery */
6043 if (tree_search(tree_nonrecipients, addr->unique))
6045 DEBUG(D_deliver|D_route)
6046 debug_printf("%s was previously delivered: discarded\n", addr->address);
6047 child_done(addr, tod_stamp(tod_log));
6051 /* Save for checking future duplicates */
6053 tree_add_duplicate(addr->unique, addr);
6055 /* Set local part and domain */
6057 addr->local_part = addr->address;
6058 addr->domain = addr->parent->domain;
6060 /* Ensure that the delivery is permitted. */
6062 if (testflag(addr, af_file))
6064 if (!testflag(addr, af_allow_file))
6066 addr->basic_errno = ERRNO_FORBIDFILE;
6067 addr->message = US"delivery to file forbidden";
6068 (void)post_process_one(addr, FAIL, LOG_MAIN, DTYPE_ROUTER, 0);
6069 continue; /* with the next new address */
6072 else if (addr->address[0] == '|')
6074 if (!testflag(addr, af_allow_pipe))
6076 addr->basic_errno = ERRNO_FORBIDPIPE;
6077 addr->message = US"delivery to pipe forbidden";
6078 (void)post_process_one(addr, FAIL, LOG_MAIN, DTYPE_ROUTER, 0);
6079 continue; /* with the next new address */
6082 else if (!testflag(addr, af_allow_reply))
6084 addr->basic_errno = ERRNO_FORBIDREPLY;
6085 addr->message = US"autoreply forbidden";
6086 (void)post_process_one(addr, FAIL, LOG_MAIN, DTYPE_ROUTER, 0);
6087 continue; /* with the next new address */
6090 /* If the errno field is already set to BADTRANSPORT, it indicates
6091 failure to expand a transport string, or find the associated transport,
6092 or an unset transport when one is required. Leave this test till now so
6093 that the forbid errors are given in preference. */
6095 if (addr->basic_errno == ERRNO_BADTRANSPORT)
6097 (void)post_process_one(addr, DEFER, LOG_MAIN, DTYPE_ROUTER, 0);
6101 /* Treat /dev/null as a special case and abandon the delivery. This
6102 avoids having to specify a uid on the transport just for this case.
6103 Arrange for the transport name to be logged as "**bypassed**". */
6105 if (Ustrcmp(addr->address, "/dev/null") == 0)
6107 uschar *save = addr->transport->name;
6108 addr->transport->name = US"**bypassed**";
6109 (void)post_process_one(addr, OK, LOG_MAIN, DTYPE_TRANSPORT, '=');
6110 addr->transport->name = save;
6111 continue; /* with the next new address */
6114 /* Pipe, file, or autoreply delivery is to go ahead as a normal local
6117 DEBUG(D_deliver|D_route)
6118 debug_printf("queued for %s transport\n", addr->transport->name);
6119 addr->next = addr_local;
6121 continue; /* with the next new address */
6124 /* Handle normal addresses. First, split up into local part and domain,
6125 handling the %-hack if necessary. There is the possibility of a defer from
6126 a lookup in percent_hack_domains. */
6128 if ((rc = deliver_split_address(addr)) == DEFER)
6130 addr->message = US"cannot check percent_hack_domains";
6131 addr->basic_errno = ERRNO_LISTDEFER;
6132 (void)post_process_one(addr, DEFER, LOG_MAIN, DTYPE_NONE, 0);
6136 /* Check to see if the domain is held. If so, proceed only if the
6137 delivery was forced by hand. */
6139 deliver_domain = addr->domain; /* set $domain */
6140 if ( !forced && hold_domains
6141 && (rc = match_isinlist(addr->domain, (const uschar **)&hold_domains, 0,
6142 &domainlist_anchor, addr->domain_cache, MCL_DOMAIN, TRUE,
6148 addr->message = US"hold_domains lookup deferred";
6149 addr->basic_errno = ERRNO_LISTDEFER;
6153 addr->message = US"domain is held";
6154 addr->basic_errno = ERRNO_HELD;
6156 (void)post_process_one(addr, DEFER, LOG_MAIN, DTYPE_NONE, 0);
6160 /* Now we can check for duplicates and previously delivered addresses. In
6161 order to do this, we have to generate a "unique" value for each address,
6162 because there may be identical actual addresses in a line of descendents.
6163 The "unique" field is initialized to the same value as the "address" field,
6164 but gets changed here to cope with identically-named descendents. */
6166 for (parent = addr->parent; parent; parent = parent->parent)
6167 if (strcmpic(addr->address, parent->address) == 0) break;
6169 /* If there's an ancestor with the same name, set the homonym flag. This
6170 influences how deliveries are recorded. Then add a prefix on the front of
6171 the unique address. We use \n\ where n starts at 0 and increases each time.
6172 It is unlikely to pass 9, but if it does, it may look odd but will still
6173 work. This means that siblings or cousins with the same names are treated
6174 as duplicates, which is what we want. */
6178 setflag(addr, af_homonym);
6179 if (parent->unique[0] != '\\')
6180 addr->unique = string_sprintf("\\0\\%s", addr->address);
6182 addr->unique = string_sprintf("\\%c\\%s", parent->unique[1] + 1,
6186 /* Ensure that the domain in the unique field is lower cased, because
6187 domains are always handled caselessly. */
6189 p = Ustrrchr(addr->unique, '@');
6190 while (*p != 0) { *p = tolower(*p); p++; }
6192 DEBUG(D_deliver|D_route) debug_printf("unique = %s\n", addr->unique);
6194 if (tree_search(tree_nonrecipients, addr->unique))
6196 DEBUG(D_deliver|D_route)
6197 debug_printf("%s was previously delivered: discarded\n", addr->unique);
6198 child_done(addr, tod_stamp(tod_log));
6202 /* Get the routing retry status, saving the two retry keys (with and
6203 without the local part) for subsequent use. If there is no retry record for
6204 the standard address routing retry key, we look for the same key with the
6205 sender attached, because this form is used by the smtp transport after a
6206 4xx response to RCPT when address_retry_include_sender is true. */
6208 addr->domain_retry_key = string_sprintf("R:%s", addr->domain);
6209 addr->address_retry_key = string_sprintf("R:%s@%s", addr->local_part,
6214 domain_retry_record = dbfn_read(dbm_file, addr->domain_retry_key);
6215 if ( domain_retry_record
6216 && now - domain_retry_record->time_stamp > retry_data_expire
6218 domain_retry_record = NULL; /* Ignore if too old */
6220 address_retry_record = dbfn_read(dbm_file, addr->address_retry_key);
6221 if ( address_retry_record
6222 && now - address_retry_record->time_stamp > retry_data_expire
6224 address_retry_record = NULL; /* Ignore if too old */
6226 if (!address_retry_record)
6228 uschar *altkey = string_sprintf("%s:<%s>", addr->address_retry_key,
6230 address_retry_record = dbfn_read(dbm_file, altkey);
6231 if ( address_retry_record
6232 && now - address_retry_record->time_stamp > retry_data_expire)
6233 address_retry_record = NULL; /* Ignore if too old */
6237 domain_retry_record = address_retry_record = NULL;
6239 DEBUG(D_deliver|D_retry)
6241 if (!domain_retry_record)
6242 debug_printf("no domain retry record\n");
6243 if (!address_retry_record)
6244 debug_printf("no address retry record\n");
6247 /* If we are sending a message down an existing SMTP connection, we must
6248 assume that the message which created the connection managed to route
6249 an address to that connection. We do not want to run the risk of taking
6250 a long time over routing here, because if we do, the server at the other
6251 end of the connection may time it out. This is especially true for messages
6252 with lots of addresses. For this kind of delivery, queue_running is not
6253 set, so we would normally route all addresses. We take a pragmatic approach
6254 and defer routing any addresses that have any kind of domain retry record.
6255 That is, we don't even look at their retry times. It doesn't matter if this
6256 doesn't work occasionally. This is all just an optimization, after all.
6258 The reason for not doing the same for address retries is that they normally
6259 arise from 4xx responses, not DNS timeouts. */
6261 if (continue_hostname && domain_retry_record)
6263 addr->message = US"reusing SMTP connection skips previous routing defer";
6264 addr->basic_errno = ERRNO_RRETRY;
6265 (void)post_process_one(addr, DEFER, LOG_MAIN, DTYPE_ROUTER, 0);
6268 /* If we are in a queue run, defer routing unless there is no retry data or
6269 we've passed the next retry time, or this message is forced. In other
6270 words, ignore retry data when not in a queue run.
6272 However, if the domain retry time has expired, always allow the routing
6273 attempt. If it fails again, the address will be failed. This ensures that
6274 each address is routed at least once, even after long-term routing
6277 If there is an address retry, check that too; just wait for the next
6278 retry time. This helps with the case when the temporary error on the
6279 address was really message-specific rather than address specific, since
6280 it allows other messages through.
6282 We also wait for the next retry time if this is a message sent down an
6283 existing SMTP connection (even though that will be forced). Otherwise there
6284 will be far too many attempts for an address that gets a 4xx error. In
6285 fact, after such an error, we should not get here because, the host should
6286 not be remembered as one this message needs. However, there was a bug that
6287 used to cause this to happen, so it is best to be on the safe side.
6289 Even if we haven't reached the retry time in the hints, there is one more
6290 check to do, which is for the ultimate address timeout. We only do this
6291 check if there is an address retry record and there is not a domain retry
6292 record; this implies that previous attempts to handle the address had the
6293 retry_use_local_parts option turned on. We use this as an approximation
6294 for the destination being like a local delivery, for example delivery over
6295 LMTP to an IMAP message store. In this situation users are liable to bump
6296 into their quota and thereby have intermittently successful deliveries,
6297 which keep the retry record fresh, which can lead to us perpetually
6298 deferring messages. */
6300 else if ( ( queue_running && !deliver_force
6301 || continue_hostname
6303 && ( ( domain_retry_record
6304 && now < domain_retry_record->next_try
6305 && !domain_retry_record->expired
6307 || ( address_retry_record
6308 && now < address_retry_record->next_try
6310 && ( domain_retry_record
6311 || !address_retry_record
6312 || !retry_ultimate_address_timeout(addr->address_retry_key,
6313 addr->domain, address_retry_record, now)
6316 addr->message = US"retry time not reached";
6317 addr->basic_errno = ERRNO_RRETRY;
6318 (void)post_process_one(addr, DEFER, LOG_MAIN, DTYPE_ROUTER, 0);
6321 /* The domain is OK for routing. Remember if retry data exists so it
6322 can be cleaned up after a successful delivery. */
6326 if (domain_retry_record || address_retry_record)
6327 setflag(addr, af_dr_retry_exists);
6328 addr->next = addr_route;
6330 DEBUG(D_deliver|D_route)
6331 debug_printf("%s: queued for routing\n", addr->address);
6335 /* The database is closed while routing is actually happening. Requests to
6336 update it are put on a chain and all processed together at the end. */
6338 if (dbm_file) dbfn_close(dbm_file);
6340 /* If queue_domains is set, we don't even want to try routing addresses in
6341 those domains. During queue runs, queue_domains is forced to be unset.
6342 Optimize by skipping this pass through the addresses if nothing is set. */
6344 if (!deliver_force && queue_domains)
6346 address_item *okaddr = NULL;
6349 address_item *addr = addr_route;
6350 addr_route = addr->next;
6352 deliver_domain = addr->domain; /* set $domain */
6353 if ((rc = match_isinlist(addr->domain, (const uschar **)&queue_domains, 0,
6354 &domainlist_anchor, addr->domain_cache, MCL_DOMAIN, TRUE, NULL))
6359 addr->basic_errno = ERRNO_LISTDEFER;
6360 addr->message = US"queue_domains lookup deferred";
6361 (void)post_process_one(addr, DEFER, LOG_MAIN, DTYPE_ROUTER, 0);
6365 addr->next = okaddr;
6371 addr->basic_errno = ERRNO_QUEUE_DOMAIN;
6372 addr->message = US"domain is in queue_domains";
6373 (void)post_process_one(addr, DEFER, LOG_MAIN, DTYPE_ROUTER, 0);
6377 addr_route = okaddr;
6380 /* Now route those addresses that are not deferred. */
6385 address_item *addr = addr_route;
6386 const uschar *old_domain = addr->domain;
6387 uschar *old_unique = addr->unique;
6388 addr_route = addr->next;
6391 /* Just in case some router parameter refers to it. */
6393 if (!(return_path = addr->prop.errors_address))
6394 return_path = sender_address;
6396 /* If a router defers an address, add a retry item. Whether or not to
6397 use the local part in the key is a property of the router. */
6399 if ((rc = route_address(addr, &addr_local, &addr_remote, &addr_new,
6400 &addr_succeed, v_none)) == DEFER)
6401 retry_add_item(addr,
6402 addr->router->retry_use_local_part
6403 ? string_sprintf("R:%s@%s", addr->local_part, addr->domain)
6404 : string_sprintf("R:%s", addr->domain),
6407 /* Otherwise, if there is an existing retry record in the database, add
6408 retry items to delete both forms. We must also allow for the possibility
6409 of a routing retry that includes the sender address. Since the domain might
6410 have been rewritten (expanded to fully qualified) as a result of routing,
6411 ensure that the rewritten form is also deleted. */
6413 else if (testflag(addr, af_dr_retry_exists))
6415 uschar *altkey = string_sprintf("%s:<%s>", addr->address_retry_key,
6417 retry_add_item(addr, altkey, rf_delete);
6418 retry_add_item(addr, addr->address_retry_key, rf_delete);
6419 retry_add_item(addr, addr->domain_retry_key, rf_delete);
6420 if (Ustrcmp(addr->domain, old_domain) != 0)
6421 retry_add_item(addr, string_sprintf("R:%s", old_domain), rf_delete);
6424 /* DISCARD is given for :blackhole: and "seen finish". The event has been
6425 logged, but we need to ensure the address (and maybe parents) is marked
6430 address_done(addr, tod_stamp(tod_log));
6431 continue; /* route next address */
6434 /* The address is finished with (failed or deferred). */
6438 (void)post_process_one(addr, rc, LOG_MAIN, DTYPE_ROUTER, 0);
6439 continue; /* route next address */
6442 /* The address has been routed. If the router changed the domain, it will
6443 also have changed the unique address. We have to test whether this address
6444 has already been delivered, because it's the unique address that finally
6447 if ( addr->unique != old_unique
6448 && tree_search(tree_nonrecipients, addr->unique) != 0
6451 DEBUG(D_deliver|D_route) debug_printf("%s was previously delivered: "
6452 "discarded\n", addr->address);
6453 if (addr_remote == addr) addr_remote = addr->next;
6454 else if (addr_local == addr) addr_local = addr->next;
6457 /* If the router has same_domain_copy_routing set, we are permitted to copy
6458 the routing for any other addresses with the same domain. This is an
6459 optimisation to save repeated DNS lookups for "standard" remote domain
6460 routing. The option is settable only on routers that generate host lists.
6461 We play it very safe, and do the optimization only if the address is routed
6462 to a remote transport, there are no header changes, and the domain was not
6463 modified by the router. */
6465 if ( addr_remote == addr
6466 && addr->router->same_domain_copy_routing
6467 && !addr->prop.extra_headers
6468 && !addr->prop.remove_headers
6469 && old_domain == addr->domain
6472 address_item **chain = &addr_route;
6475 address_item *addr2 = *chain;
6476 if (Ustrcmp(addr2->domain, addr->domain) != 0)
6478 chain = &(addr2->next);
6482 /* Found a suitable address; take it off the routing list and add it to
6483 the remote delivery list. */
6485 *chain = addr2->next;
6486 addr2->next = addr_remote;
6487 addr_remote = addr2;
6489 /* Copy the routing data */
6491 addr2->domain = addr->domain;
6492 addr2->router = addr->router;
6493 addr2->transport = addr->transport;
6494 addr2->host_list = addr->host_list;
6495 addr2->fallback_hosts = addr->fallback_hosts;
6496 addr2->prop.errors_address = addr->prop.errors_address;
6497 copyflag(addr2, addr, af_hide_child | af_local_host_removed);
6499 DEBUG(D_deliver|D_route)
6501 debug_printf(">>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>\n"
6503 "Routing for %s copied from %s\n",
6504 addr2->address, addr2->address, addr->address);
6508 } /* Continue with routing the next address. */
6509 } /* Loop to process any child addresses that the routers created, and
6510 any rerouted addresses that got put back on the new chain. */
6513 /* Debugging: show the results of the routing */
6515 DEBUG(D_deliver|D_retry|D_route)
6518 debug_printf(">>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>\n");
6519 debug_printf("After routing:\n Local deliveries:\n");
6520 for (p = addr_local; p; p = p->next)
6521 debug_printf(" %s\n", p->address);
6523 debug_printf(" Remote deliveries:\n");
6524 for (p = addr_remote; p; p = p->next)
6525 debug_printf(" %s\n", p->address);
6527 debug_printf(" Failed addresses:\n");
6528 for (p = addr_failed; p; p = p->next)
6529 debug_printf(" %s\n", p->address);
6531 debug_printf(" Deferred addresses:\n");
6532 for (p = addr_defer; p; p = p->next)
6533 debug_printf(" %s\n", p->address);
6536 /* Free any resources that were cached during routing. */
6541 /* These two variables are set only during routing, after check_local_user.
6542 Ensure they are not set in transports. */
6544 local_user_gid = (gid_t)(-1);
6545 local_user_uid = (uid_t)(-1);
6547 /* Check for any duplicate addresses. This check is delayed until after
6548 routing, because the flexibility of the routing configuration means that
6549 identical addresses with different parentage may end up being redirected to
6550 different addresses. Checking for duplicates too early (as we previously used
6551 to) makes this kind of thing not work. */
6553 do_duplicate_check(&addr_local);
6554 do_duplicate_check(&addr_remote);
6556 /* When acting as an MUA wrapper, we proceed only if all addresses route to a
6557 remote transport. The check that they all end up in one transaction happens in
6558 the do_remote_deliveries() function. */
6561 && (addr_local || addr_failed || addr_defer)
6565 uschar *which, *colon, *msg;
6572 else if (addr_defer)
6575 which = US"deferred";
6583 while (addr->parent) addr = addr->parent;
6588 msg = addr->message;
6590 else colon = msg = US"";
6592 /* We don't need to log here for a forced failure as it will already
6593 have been logged. Defer will also have been logged, but as a defer, so we do
6594 need to do the failure logging. */
6596 if (addr != addr_failed)
6597 log_write(0, LOG_MAIN, "** %s routing yielded a %s delivery",
6598 addr->address, which);
6600 /* Always write an error to the caller */
6602 fprintf(stderr, "routing %s yielded a %s delivery%s%s\n", addr->address,
6605 final_yield = DELIVER_MUA_FAILED;
6606 addr_failed = addr_defer = NULL; /* So that we remove the message */
6607 goto DELIVERY_TIDYUP;
6611 /* If this is a run to continue deliveries to an external channel that is
6612 already set up, defer any local deliveries. */
6614 if (continue_transport)
6618 address_item *addr = addr_defer;
6619 while (addr->next) addr = addr->next;
6620 addr->next = addr_local;
6623 addr_defer = addr_local;
6628 /* Because address rewriting can happen in the routers, we should not really do
6629 ANY deliveries until all addresses have been routed, so that all recipients of
6630 the message get the same headers. However, this is in practice not always
6631 possible, since sometimes remote addresses give DNS timeouts for days on end.
6632 The pragmatic approach is to deliver what we can now, saving any rewritten
6633 headers so that at least the next lot of recipients benefit from the rewriting
6634 that has already been done.
6636 If any headers have been rewritten during routing, update the spool file to
6637 remember them for all subsequent deliveries. This can be delayed till later if
6638 there is only address to be delivered - if it succeeds the spool write need not
6641 if ( header_rewritten
6643 && (addr_local->next || addr_remote)
6645 || (addr_remote && addr_remote->next)
6648 /* Panic-dies on error */
6649 (void)spool_write_header(message_id, SW_DELIVERING, NULL);
6650 header_rewritten = FALSE;
6654 /* If there are any deliveries to be done, open the journal file. This is used
6655 to record successful deliveries as soon as possible after each delivery is
6656 known to be complete. A file opened with O_APPEND is used so that several
6657 processes can run simultaneously.
6659 The journal is just insurance against crashes. When the spool file is
6660 ultimately updated at the end of processing, the journal is deleted. If a
6661 journal is found to exist at the start of delivery, the addresses listed
6662 therein are added to the non-recipients. */
6664 if (addr_local || addr_remote)
6666 uschar * fname = spool_fname(US"input", message_subdir, id, US"-J");
6668 if ((journal_fd = Uopen(fname, O_WRONLY|O_APPEND|O_CREAT, SPOOL_MODE)) <0)
6670 log_write(0, LOG_MAIN|LOG_PANIC, "Couldn't open journal file %s: %s",
6671 fname, strerror(errno));
6672 return DELIVER_NOT_ATTEMPTED;
6675 /* Set the close-on-exec flag, make the file owned by Exim, and ensure
6676 that the mode is correct - the group setting doesn't always seem to get
6677 set automatically. */
6679 if( fcntl(journal_fd, F_SETFD, fcntl(journal_fd, F_GETFD) | FD_CLOEXEC)
6680 || fchown(journal_fd, exim_uid, exim_gid)
6681 || fchmod(journal_fd, SPOOL_MODE)
6684 int ret = Uunlink(fname);
6685 log_write(0, LOG_MAIN|LOG_PANIC, "Couldn't set perms on journal file %s: %s",
6686 fname, strerror(errno));
6687 if(ret && errno != ENOENT)
6688 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to unlink %s: %s",
6689 fname, strerror(errno));
6690 return DELIVER_NOT_ATTEMPTED;
6696 /* Now we can get down to the business of actually doing deliveries. Local
6697 deliveries are done first, then remote ones. If ever the problems of how to
6698 handle fallback transports are figured out, this section can be put into a loop
6699 for handling fallbacks, though the uid switching will have to be revised. */
6701 /* Precompile a regex that is used to recognize a parameter in response
6702 to an LHLO command, if is isn't already compiled. This may be used on both
6703 local and remote LMTP deliveries. */
6705 if (!regex_IGNOREQUOTA)
6707 regex_must_compile(US"\\n250[\\s\\-]IGNOREQUOTA(\\s|\\n|$)", FALSE, TRUE);
6709 /* Handle local deliveries */
6713 DEBUG(D_deliver|D_transport)
6714 debug_printf(">>>>>>>>>>>>>>>> Local deliveries >>>>>>>>>>>>>>>>\n");
6715 do_local_deliveries();
6716 disable_logging = FALSE;
6719 /* If queue_run_local is set, we do not want to attempt any remote deliveries,
6720 so just queue them all. */
6722 if (queue_run_local)
6725 address_item *addr = addr_remote;
6726 addr_remote = addr->next;
6728 addr->basic_errno = ERRNO_LOCAL_ONLY;
6729 addr->message = US"remote deliveries suppressed";
6730 (void)post_process_one(addr, DEFER, LOG_MAIN, DTYPE_TRANSPORT, 0);
6733 /* Handle remote deliveries */
6737 DEBUG(D_deliver|D_transport)
6738 debug_printf(">>>>>>>>>>>>>>>> Remote deliveries >>>>>>>>>>>>>>>>\n");
6740 /* Precompile some regex that are used to recognize parameters in response
6741 to an EHLO command, if they aren't already compiled. */
6745 /* Now sort the addresses if required, and do the deliveries. The yield of
6746 do_remote_deliveries is FALSE when mua_wrapper is set and all addresses
6747 cannot be delivered in one transaction. */
6749 if (remote_sort_domains) sort_remote_deliveries();
6750 if (!do_remote_deliveries(FALSE))
6752 log_write(0, LOG_MAIN, "** mua_wrapper is set but recipients cannot all "
6753 "be delivered in one transaction");
6754 fprintf(stderr, "delivery to smarthost failed (configuration problem)\n");
6756 final_yield = DELIVER_MUA_FAILED;
6757 addr_failed = addr_defer = NULL; /* So that we remove the message */
6758 goto DELIVERY_TIDYUP;
6761 /* See if any of the addresses that failed got put on the queue for delivery
6762 to their fallback hosts. We do it this way because often the same fallback
6763 host is used for many domains, so all can be sent in a single transaction
6764 (if appropriately configured). */
6766 if (addr_fallback && !mua_wrapper)
6768 DEBUG(D_deliver) debug_printf("Delivering to fallback hosts\n");
6769 addr_remote = addr_fallback;
6770 addr_fallback = NULL;
6771 if (remote_sort_domains) sort_remote_deliveries();
6772 do_remote_deliveries(TRUE);
6774 disable_logging = FALSE;
6778 /* All deliveries are now complete. Ignore SIGTERM during this tidying up
6779 phase, to minimize cases of half-done things. */
6782 debug_printf(">>>>>>>>>>>>>>>> deliveries are done >>>>>>>>>>>>>>>>\n");
6784 /* Root privilege is no longer needed */
6786 exim_setugid(exim_uid, exim_gid, FALSE, US"post-delivery tidying");
6788 set_process_info("tidying up after delivering %s", message_id);
6789 signal(SIGTERM, SIG_IGN);
6791 /* When we are acting as an MUA wrapper, the smtp transport will either have
6792 succeeded for all addresses, or failed them all in normal cases. However, there
6793 are some setup situations (e.g. when a named port does not exist) that cause an
6794 immediate exit with deferral of all addresses. Convert those into failures. We
6795 do not ever want to retry, nor do we want to send a bounce message. */
6801 address_item *addr, *nextaddr;
6802 for (addr = addr_defer; addr; addr = nextaddr)
6804 log_write(0, LOG_MAIN, "** %s mua_wrapper forced failure for deferred "
6805 "delivery", addr->address);
6806 nextaddr = addr->next;
6807 addr->next = addr_failed;
6813 /* Now all should either have succeeded or failed. */
6816 final_yield = DELIVER_MUA_SUCCEEDED;
6820 uschar *s = addr_failed->user_message;
6822 if (!s) s = addr_failed->message;
6824 fprintf(stderr, "Delivery failed: ");
6825 if (addr_failed->basic_errno > 0)
6827 fprintf(stderr, "%s", strerror(addr_failed->basic_errno));
6828 if (s) fprintf(stderr, ": ");
6830 if ((host = addr_failed->host_used))
6831 fprintf(stderr, "H=%s [%s]: ", host->name, host->address);
6833 fprintf(stderr, "%s", CS s);
6834 else if (addr_failed->basic_errno <= 0)
6835 fprintf(stderr, "unknown error");
6836 fprintf(stderr, "\n");
6838 final_yield = DELIVER_MUA_FAILED;
6843 /* In a normal configuration, we now update the retry database. This is done in
6844 one fell swoop at the end in order not to keep opening and closing (and
6845 locking) the database. The code for handling retries is hived off into a
6846 separate module for convenience. We pass it the addresses of the various
6847 chains, because deferred addresses can get moved onto the failed chain if the
6848 retry cutoff time has expired for all alternative destinations. Bypass the
6849 updating of the database if the -N flag is set, which is a debugging thing that
6850 prevents actual delivery. */
6852 else if (!dont_deliver)
6853 retry_update(&addr_defer, &addr_failed, &addr_succeed);
6855 /* Send DSN for successful messages if requested */
6856 addr_senddsn = NULL;
6858 for (addr_dsntmp = addr_succeed; addr_dsntmp; addr_dsntmp = addr_dsntmp->next)
6860 /* af_ignore_error not honored here. it's not an error */
6861 DEBUG(D_deliver) debug_printf("DSN: processing router : %s\n"
6862 "DSN: processing successful delivery address: %s\n"
6863 "DSN: Sender_address: %s\n"
6864 "DSN: orcpt: %s flags: %d\n"
6865 "DSN: envid: %s ret: %d\n"
6866 "DSN: Final recipient: %s\n"
6867 "DSN: Remote SMTP server supports DSN: %d\n",
6868 addr_dsntmp->router->name,
6869 addr_dsntmp->address,
6871 addr_dsntmp->dsn_orcpt, addr_dsntmp->dsn_flags,
6873 addr_dsntmp->address,
6874 addr_dsntmp->dsn_aware
6877 /* send report if next hop not DSN aware or a router flagged "last DSN hop"
6878 and a report was requested */
6879 if ( ( addr_dsntmp->dsn_aware != dsn_support_yes
6880 || addr_dsntmp->dsn_flags & rf_dsnlasthop
6882 && addr_dsntmp->dsn_flags & rf_dsnflags
6883 && addr_dsntmp->dsn_flags & rf_notify_success
6886 /* copy and relink address_item and send report with all of them at once later */
6887 address_item *addr_next;
6888 addr_next = addr_senddsn;
6889 addr_senddsn = store_get(sizeof(address_item));
6890 memcpy(addr_senddsn, addr_dsntmp, sizeof(address_item));
6891 addr_senddsn->next = addr_next;
6894 DEBUG(D_deliver) debug_printf("DSN: not sending DSN success message\n");
6902 /* create exim process to send message */
6903 pid = child_open_exim(&fd);
6905 DEBUG(D_deliver) debug_printf("DSN: child_open_exim returns: %d\n", pid);
6907 if (pid < 0) /* Creation of child failed */
6909 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Process %d (parent %d) failed to "
6910 "create child process to send failure message: %s", getpid(),
6911 getppid(), strerror(errno));
6913 DEBUG(D_deliver) debug_printf("DSN: child_open_exim failed\n");
6915 else /* Creation of child succeeded */
6917 FILE *f = fdopen(fd, "wb");
6918 /* header only as required by RFC. only failure DSN needs to honor RET=FULL */
6920 transport_ctx tctx = {0};
6923 debug_printf("sending error message to: %s\n", sender_address);
6925 /* build unique id for MIME boundary */
6926 bound = string_sprintf(TIME_T_FMT "-eximdsn-%d", time(NULL), rand());
6927 DEBUG(D_deliver) debug_printf("DSN: MIME boundary: %s\n", bound);
6929 if (errors_reply_to)
6930 fprintf(f, "Reply-To: %s\n", errors_reply_to);
6932 fprintf(f, "Auto-Submitted: auto-generated\n"
6933 "From: Mail Delivery System <Mailer-Daemon@%s>\n"
6935 "Subject: Delivery Status Notification\n"
6936 "Content-Type: multipart/report; report-type=delivery-status; boundary=%s\n"
6937 "MIME-Version: 1.0\n\n"
6940 "Content-type: text/plain; charset=us-ascii\n\n"
6942 "This message was created automatically by mail delivery software.\n"
6943 " ----- The following addresses had successful delivery notifications -----\n",
6944 qualify_domain_sender, sender_address, bound, bound);
6946 for (addr_dsntmp = addr_senddsn; addr_dsntmp;
6947 addr_dsntmp = addr_dsntmp->next)
6948 fprintf(f, "<%s> (relayed %s)\n\n",
6949 addr_dsntmp->address,
6950 (addr_dsntmp->dsn_flags & rf_dsnlasthop) == 1
6951 ? "via non DSN router"
6952 : addr_dsntmp->dsn_aware == dsn_support_no
6953 ? "to non-DSN-aware mailer"
6954 : "via non \"Remote SMTP\" router"
6958 "Content-type: message/delivery-status\n\n"
6959 "Reporting-MTA: dns; %s\n",
6960 bound, smtp_active_hostname);
6963 { /* must be decoded from xtext: see RFC 3461:6.3a */
6965 if (auth_xtextdecode(dsn_envid, &xdec_envid) > 0)
6966 fprintf(f, "Original-Envelope-ID: %s\n", dsn_envid);
6968 fprintf(f, "X-Original-Envelope-ID: error decoding xtext formatted ENVID\n");
6972 for (addr_dsntmp = addr_senddsn;
6974 addr_dsntmp = addr_dsntmp->next)
6976 if (addr_dsntmp->dsn_orcpt)
6977 fprintf(f,"Original-Recipient: %s\n", addr_dsntmp->dsn_orcpt);
6979 fprintf(f, "Action: delivered\n"
6980 "Final-Recipient: rfc822;%s\n"
6982 addr_dsntmp->address);
6984 if (addr_dsntmp->host_used && addr_dsntmp->host_used->name)
6985 fprintf(f, "Remote-MTA: dns; %s\nDiagnostic-Code: smtp; 250 Ok\n\n",
6986 addr_dsntmp->host_used->name);
6988 fprintf(f, "Diagnostic-Code: X-Exim; relayed via non %s router\n\n",
6989 (addr_dsntmp->dsn_flags & rf_dsnlasthop) == 1 ? "DSN" : "SMTP");
6992 fprintf(f, "--%s\nContent-type: text/rfc822-headers\n\n", bound);
6995 transport_filter_argv = NULL; /* Just in case */
6996 return_path = sender_address; /* In case not previously set */
6998 /* Write the original email out */
7000 tctx.options = topt_add_return_path | topt_no_body;
7001 transport_write_message(fileno(f), &tctx, 0);
7004 fprintf(f,"\n--%s--\n", bound);
7008 rc = child_close(pid, 0); /* Waits for child to close, no timeout */
7012 /* If any addresses failed, we must send a message to somebody, unless
7013 af_ignore_error is set, in which case no action is taken. It is possible for
7014 several messages to get sent if there are addresses with different
7021 uschar *logtod = tod_stamp(tod_log);
7023 address_item *handled_addr = NULL;
7024 address_item **paddr;
7025 address_item *msgchain = NULL;
7026 address_item **pmsgchain = &msgchain;
7028 /* There are weird cases when logging is disabled in the transport. However,
7029 there may not be a transport (address failed by a router). */
7031 disable_logging = FALSE;
7032 if (addr_failed->transport)
7033 disable_logging = addr_failed->transport->disable_logging;
7036 debug_printf("processing failed address %s\n", addr_failed->address);
7038 /* There are only two ways an address in a bounce message can get here:
7040 (1) When delivery was initially deferred, but has now timed out (in the call
7041 to retry_update() above). We can detect this by testing for
7042 af_retry_timedout. If the address does not have its own errors address,
7043 we arrange to ignore the error.
7045 (2) If delivery failures for bounce messages are being ignored. We can detect
7046 this by testing for af_ignore_error. This will also be set if a bounce
7047 message has been autothawed and the ignore_bounce_errors_after time has
7048 passed. It might also be set if a router was explicitly configured to
7049 ignore errors (errors_to = "").
7051 If neither of these cases obtains, something has gone wrong. Log the
7052 incident, but then ignore the error. */
7054 if (sender_address[0] == 0 && !addr_failed->prop.errors_address)
7056 if ( !testflag(addr_failed, af_retry_timedout)
7057 && !testflag(addr_failed, af_ignore_error))
7059 log_write(0, LOG_MAIN|LOG_PANIC, "internal error: bounce message "
7060 "failure is neither frozen nor ignored (it's been ignored)");
7062 setflag(addr_failed, af_ignore_error);
7065 /* If the first address on the list has af_ignore_error set, just remove
7066 it from the list, throw away any saved message file, log it, and
7067 mark the recipient done. */
7069 if ( testflag(addr_failed, af_ignore_error)
7070 || ( addr_failed->dsn_flags & rf_dsnflags
7071 && (addr_failed->dsn_flags & rf_notify_failure) != rf_notify_failure
7075 addr_failed = addr->next;
7076 if (addr->return_filename) Uunlink(addr->return_filename);
7078 log_write(0, LOG_MAIN, "%s%s%s%s: error ignored",
7080 !addr->parent ? US"" : US" <",
7081 !addr->parent ? US"" : addr->parent->address,
7082 !addr->parent ? US"" : US">");
7084 address_done(addr, logtod);
7085 child_done(addr, logtod);
7086 /* Panic-dies on error */
7087 (void)spool_write_header(message_id, SW_DELIVERING, NULL);
7090 /* Otherwise, handle the sending of a message. Find the error address for
7091 the first address, then send a message that includes all failed addresses
7092 that have the same error address. Note the bounce_recipient is a global so
7093 that it can be accesssed by $bounce_recipient while creating a customized
7098 if (!(bounce_recipient = addr_failed->prop.errors_address))
7099 bounce_recipient = sender_address;
7101 /* Make a subprocess to send a message */
7103 if ((pid = child_open_exim(&fd)) < 0)
7104 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Process %d (parent %d) failed to "
7105 "create child process to send failure message: %s", getpid(),
7106 getppid(), strerror(errno));
7108 /* Creation of child succeeded */
7115 uschar *bcc, *emf_text;
7116 FILE *f = fdopen(fd, "wb");
7118 BOOL to_sender = strcmpic(sender_address, bounce_recipient) == 0;
7119 int max = (bounce_return_size_limit/DELIVER_IN_BUFFER_SIZE + 1) *
7120 DELIVER_IN_BUFFER_SIZE;
7122 uschar *dsnlimitmsg;
7123 uschar *dsnnotifyhdr;
7127 debug_printf("sending error message to: %s\n", bounce_recipient);
7129 /* Scan the addresses for all that have the same errors address, removing
7130 them from the addr_failed chain, and putting them on msgchain. */
7132 paddr = &addr_failed;
7133 for (addr = addr_failed; addr; addr = *paddr)
7134 if (Ustrcmp(bounce_recipient, addr->prop.errors_address
7135 ? addr->prop.errors_address : sender_address) == 0)
7136 { /* The same - dechain */
7137 *paddr = addr->next;
7140 pmsgchain = &(addr->next);
7143 paddr = &addr->next; /* Not the same; skip */
7145 /* Include X-Failed-Recipients: for automatic interpretation, but do
7146 not let any one header line get too long. We do this by starting a
7147 new header every 50 recipients. Omit any addresses for which the
7148 "hide_child" flag is set. */
7150 for (addr = msgchain; addr; addr = addr->next)
7152 if (testflag(addr, af_hide_child)) continue;
7160 ? "X-Failed-Recipients: "
7162 testflag(addr, af_pfr) && addr->parent
7163 ? string_printing(addr->parent->address)
7164 : string_printing(addr->address));
7166 if (rcount > 0) fprintf(f, "\n");
7168 /* Output the standard headers */
7170 if (errors_reply_to)
7171 fprintf(f, "Reply-To: %s\n", errors_reply_to);
7172 fprintf(f, "Auto-Submitted: auto-replied\n");
7174 fprintf(f, "To: %s\n", bounce_recipient);
7176 /* generate boundary string and output MIME-Headers */
7177 bound = string_sprintf(TIME_T_FMT "-eximdsn-%d", time(NULL), rand());
7179 fprintf(f, "Content-Type: multipart/report;"
7180 " report-type=delivery-status; boundary=%s\n"
7181 "MIME-Version: 1.0\n",
7184 /* Open a template file if one is provided. Log failure to open, but
7185 carry on - default texts will be used. */
7187 if (bounce_message_file)
7188 if (!(emf = Ufopen(bounce_message_file, "rb")))
7189 log_write(0, LOG_MAIN|LOG_PANIC, "Failed to open %s for error "
7190 "message texts: %s", bounce_message_file, strerror(errno));
7192 /* Quietly copy to configured additional addresses if required. */
7194 if ((bcc = moan_check_errorcopy(bounce_recipient)))
7195 fprintf(f, "Bcc: %s\n", bcc);
7197 /* The texts for the message can be read from a template file; if there
7198 isn't one, or if it is too short, built-in texts are used. The first
7199 emf text is a Subject: and any other headers. */
7201 if ((emf_text = next_emf(emf, US"header")))
7202 fprintf(f, "%s\n", emf_text);
7204 fprintf(f, "Subject: Mail delivery failed%s\n\n",
7205 to_sender? ": returning message to sender" : "");
7207 /* output human readable part as text/plain section */
7209 "Content-type: text/plain; charset=us-ascii\n\n",
7212 if ((emf_text = next_emf(emf, US"intro")))
7213 fprintf(f, "%s", CS emf_text);
7217 /* This message has been reworded several times. It seems to be confusing to
7218 somebody, however it is worded. I have retreated to the original, simple
7220 "This message was created automatically by mail delivery software.\n");
7222 if (bounce_message_text)
7223 fprintf(f, "%s", CS bounce_message_text);
7226 "\nA message that you sent could not be delivered to one or more of its\n"
7227 "recipients. This is a permanent error. The following address(es) failed:\n");
7230 "\nA message sent by\n\n <%s>\n\n"
7231 "could not be delivered to one or more of its recipients. The following\n"
7232 "address(es) failed:\n", sender_address);
7236 /* Process the addresses, leaving them on the msgchain if they have a
7237 file name for a return message. (There has already been a check in
7238 post_process_one() for the existence of data in the message file.) A TRUE
7239 return from print_address_information() means that the address is not
7243 for (addr = msgchain; addr; addr = *paddr)
7245 if (print_address_information(addr, f, US" ", US"\n ", US""))
7246 print_address_error(addr, f, US"");
7248 /* End the final line for the address */
7252 /* Leave on msgchain if there's a return file. */
7254 if (addr->return_file >= 0)
7256 paddr = &(addr->next);
7260 /* Else save so that we can tick off the recipient when the
7265 *paddr = addr->next;
7266 addr->next = handled_addr;
7267 handled_addr = addr;
7273 /* Get the next text, whether we need it or not, so as to be
7274 positioned for the one after. */
7276 emf_text = next_emf(emf, US"generated text");
7278 /* If there were any file messages passed by the local transports,
7279 include them in the message. Then put the address on the handled chain.
7280 In the case of a batch of addresses that were all sent to the same
7281 transport, the return_file field in all of them will contain the same
7282 fd, and the return_filename field in the *last* one will be set (to the
7283 name of the file). */
7287 address_item *nextaddr;
7290 fprintf(f, "%s", CS emf_text);
7293 "The following text was generated during the delivery "
7294 "attempt%s:\n", (filecount > 1)? "s" : "");
7296 for (addr = msgchain; addr; addr = nextaddr)
7299 address_item *topaddr = addr;
7301 /* List all the addresses that relate to this file */
7304 while(addr) /* Insurance */
7306 print_address_information(addr, f, US"------ ", US"\n ",
7308 if (addr->return_filename) break;
7313 /* Now copy the file */
7315 if (!(fm = Ufopen(addr->return_filename, "rb")))
7316 fprintf(f, " +++ Exim error... failed to open text file: %s\n",
7320 while ((ch = fgetc(fm)) != EOF) fputc(ch, f);
7323 Uunlink(addr->return_filename);
7325 /* Can now add to handled chain, first fishing off the next
7326 address on the msgchain. */
7328 nextaddr = addr->next;
7329 addr->next = handled_addr;
7330 handled_addr = topaddr;
7335 /* output machine readable part */
7337 if (message_smtputf8)
7339 "Content-type: message/global-delivery-status\n\n"
7340 "Reporting-MTA: dns; %s\n",
7341 bound, smtp_active_hostname);
7345 "Content-type: message/delivery-status\n\n"
7346 "Reporting-MTA: dns; %s\n",
7347 bound, smtp_active_hostname);
7351 /* must be decoded from xtext: see RFC 3461:6.3a */
7353 if (auth_xtextdecode(dsn_envid, &xdec_envid) > 0)
7354 fprintf(f, "Original-Envelope-ID: %s\n", dsn_envid);
7356 fprintf(f, "X-Original-Envelope-ID: error decoding xtext formatted ENVID\n");
7360 for (addr = handled_addr; addr; addr = addr->next)
7363 fprintf(f, "Action: failed\n"
7364 "Final-Recipient: rfc822;%s\n"
7367 if ((hu = addr->host_used) && hu->name)
7370 fprintf(f, "Remote-MTA: dns; %s\n", hu->name);
7371 #ifdef EXPERIMENTAL_DSN_INFO
7374 uschar * p = hu->port == 25
7375 ? US"" : string_sprintf(":%d", hu->port);
7376 fprintf(f, "Remote-MTA: X-ip; [%s]%s\n", hu->address, p);
7378 if ((s = addr->smtp_greeting) && *s)
7379 fprintf(f, "X-Remote-MTA-smtp-greeting: X-str; %s\n", s);
7380 if ((s = addr->helo_response) && *s)
7381 fprintf(f, "X-Remote-MTA-helo-response: X-str; %s\n", s);
7382 if ((s = addr->message) && *s)
7383 fprintf(f, "X-Exim-Diagnostic: X-str; %s\n", s);
7385 print_dsn_diagnostic_code(addr, f);
7390 /* Now copy the message, trying to give an intelligible comment if
7391 it is too long for it all to be copied. The limit isn't strictly
7392 applied because of the buffering. There is, however, an option
7393 to suppress copying altogether. */
7395 emf_text = next_emf(emf, US"copy");
7398 we ignore the intro text from template and add
7399 the text for bounce_return_size_limit at the end.
7401 bounce_return_message is ignored
7402 in case RET= is defined we honor these values
7403 otherwise bounce_return_body is honored.
7405 bounce_return_size_limit is always honored.
7408 fprintf(f, "--%s\n", bound);
7410 dsnlimitmsg = US"X-Exim-DSN-Information: Due to administrative limits only headers are returned";
7411 dsnnotifyhdr = NULL;
7412 topt = topt_add_return_path;
7414 /* RET=HDRS? top priority */
7415 if (dsn_ret == dsn_ret_hdrs)
7416 topt |= topt_no_body;
7419 struct stat statbuf;
7421 /* no full body return at all? */
7422 if (!bounce_return_body)
7424 topt |= topt_no_body;
7425 /* add header if we overrule RET=FULL */
7426 if (dsn_ret == dsn_ret_full)
7427 dsnnotifyhdr = dsnlimitmsg;
7429 /* line length limited... return headers only if oversize */
7430 /* size limited ... return headers only if limit reached */
7431 else if ( max_received_linelength > bounce_return_linesize_limit
7432 || ( bounce_return_size_limit > 0
7433 && fstat(deliver_datafile, &statbuf) == 0
7434 && statbuf.st_size > max
7437 topt |= topt_no_body;
7438 dsnnotifyhdr = dsnlimitmsg;
7443 if (message_smtputf8)
7444 fputs(topt & topt_no_body ? "Content-type: message/global-headers\n\n"
7445 : "Content-type: message/global\n\n",
7449 fputs(topt & topt_no_body ? "Content-type: text/rfc822-headers\n\n"
7450 : "Content-type: message/rfc822\n\n",
7454 transport_filter_argv = NULL; /* Just in case */
7455 return_path = sender_address; /* In case not previously set */
7456 { /* Dummy transport for headers add */
7457 transport_ctx tctx = {0};
7458 transport_instance tb = {0};
7461 tctx.options = topt;
7462 tb.add_headers = dsnnotifyhdr;
7464 transport_write_message(fileno(f), &tctx, 0);
7468 /* we never add the final text. close the file */
7472 fprintf(f, "\n--%s--\n", bound);
7474 /* Close the file, which should send an EOF to the child process
7475 that is receiving the message. Wait for it to finish. */
7478 rc = child_close(pid, 0); /* Waits for child to close, no timeout */
7480 /* In the test harness, let the child do it's thing first. */
7482 if (running_in_test_harness) millisleep(500);
7484 /* If the process failed, there was some disaster in setting up the
7485 error message. Unless the message is very old, ensure that addr_defer
7486 is non-null, which will have the effect of leaving the message on the
7487 spool. The failed addresses will get tried again next time. However, we
7488 don't really want this to happen too often, so freeze the message unless
7489 there are some genuine deferred addresses to try. To do this we have
7490 to call spool_write_header() here, because with no genuine deferred
7491 addresses the normal code below doesn't get run. */
7496 if (now - received_time < retry_maximum_timeout && !addr_defer)
7498 addr_defer = (address_item *)(+1);
7499 deliver_freeze = TRUE;
7500 deliver_frozen_at = time(NULL);
7501 /* Panic-dies on error */
7502 (void)spool_write_header(message_id, SW_DELIVERING, NULL);
7505 deliver_msglog("Process failed (%d) when writing error message "
7506 "to %s%s", rc, bounce_recipient, s);
7507 log_write(0, LOG_MAIN, "Process failed (%d) when writing error message "
7508 "to %s%s", rc, bounce_recipient, s);
7511 /* The message succeeded. Ensure that the recipients that failed are
7512 now marked finished with on the spool and their parents updated. */
7516 for (addr = handled_addr; addr; addr = addr->next)
7518 address_done(addr, logtod);
7519 child_done(addr, logtod);
7521 /* Panic-dies on error */
7522 (void)spool_write_header(message_id, SW_DELIVERING, NULL);
7528 disable_logging = FALSE; /* In case left set */
7530 /* Come here from the mua_wrapper case if routing goes wrong */
7534 /* If there are now no deferred addresses, we are done. Preserve the
7535 message log if so configured, and we are using them. Otherwise, sling it.
7536 Then delete the message itself. */
7544 fname = spool_fname(US"msglog", message_subdir, id, US"");
7545 if (preserve_message_logs)
7548 uschar * moname = spool_fname(US"msglog.OLD", US"", id, US"");
7550 if ((rc = Urename(fname, moname)) < 0)
7552 (void)directory_make(spool_directory,
7553 spool_sname(US"msglog.OLD", US""),
7554 MSGLOG_DIRECTORY_MODE, TRUE);
7555 rc = Urename(fname, moname);
7558 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to move %s to the "
7559 "msglog.OLD directory", fname);
7562 if (Uunlink(fname) < 0)
7563 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to unlink %s: %s",
7564 fname, strerror(errno));
7567 /* Remove the two message files. */
7569 fname = spool_fname(US"input", message_subdir, id, US"-D");
7570 if (Uunlink(fname) < 0)
7571 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to unlink %s: %s",
7572 fname, strerror(errno));
7573 fname = spool_fname(US"input", message_subdir, id, US"-H");
7574 if (Uunlink(fname) < 0)
7575 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to unlink %s: %s",
7576 fname, strerror(errno));
7578 /* Log the end of this message, with queue time if requested. */
7580 if (LOGGING(queue_time_overall))
7581 log_write(0, LOG_MAIN, "Completed QT=%s",
7582 readconf_printtime( (int) ((long)time(NULL) - (long)received_time)) );
7584 log_write(0, LOG_MAIN, "Completed");
7586 /* Unset deliver_freeze so that we won't try to move the spool files further down */
7587 deliver_freeze = FALSE;
7589 #ifndef DISABLE_EVENT
7590 (void) event_raise(event_action, US"msg:complete", NULL);
7594 /* If there are deferred addresses, we are keeping this message because it is
7595 not yet completed. Lose any temporary files that were catching output from
7596 pipes for any of the deferred addresses, handle one-time aliases, and see if
7597 the message has been on the queue for so long that it is time to send a warning
7598 message to the sender, unless it is a mailer-daemon. If all deferred addresses
7599 have the same domain, we can set deliver_domain for the expansion of
7600 delay_warning_ condition - if any of them are pipes, files, or autoreplies, use
7601 the parent's domain.
7603 If all the deferred addresses have an error number that indicates "retry time
7604 not reached", skip sending the warning message, because it won't contain the
7605 reason for the delay. It will get sent at the next real delivery attempt.
7606 However, if at least one address has tried, we'd better include all of them in
7609 If we can't make a process to send the message, don't worry.
7611 For mailing list expansions we want to send the warning message to the
7612 mailing list manager. We can't do a perfect job here, as some addresses may
7613 have different errors addresses, but if we take the errors address from
7614 each deferred address it will probably be right in most cases.
7616 If addr_defer == +1, it means there was a problem sending an error message
7617 for failed addresses, and there were no "real" deferred addresses. The value
7618 was set just to keep the message on the spool, so there is nothing to do here.
7621 else if (addr_defer != (address_item *)(+1))
7624 uschar *recipients = US"";
7625 BOOL delivery_attempted = FALSE;
7627 deliver_domain = testflag(addr_defer, af_pfr)
7628 ? addr_defer->parent->domain : addr_defer->domain;
7630 for (addr = addr_defer; addr; addr = addr->next)
7632 address_item *otaddr;
7634 if (addr->basic_errno > ERRNO_RETRY_BASE) delivery_attempted = TRUE;
7638 const uschar *d = testflag(addr, af_pfr)
7639 ? addr->parent->domain : addr->domain;
7641 /* The domain may be unset for an address that has never been routed
7642 because the system filter froze the message. */
7644 if (!d || Ustrcmp(d, deliver_domain) != 0)
7645 deliver_domain = NULL;
7648 if (addr->return_filename) Uunlink(addr->return_filename);
7650 /* Handle the case of one-time aliases. If any address in the ancestry
7651 of this one is flagged, ensure it is in the recipients list, suitably
7652 flagged, and that its parent is marked delivered. */
7654 for (otaddr = addr; otaddr; otaddr = otaddr->parent)
7655 if (otaddr->onetime_parent) break;
7660 int t = recipients_count;
7662 for (i = 0; i < recipients_count; i++)
7664 uschar *r = recipients_list[i].address;
7665 if (Ustrcmp(otaddr->onetime_parent, r) == 0) t = i;
7666 if (Ustrcmp(otaddr->address, r) == 0) break;
7669 /* Didn't find the address already in the list, and did find the
7670 ultimate parent's address in the list. After adding the recipient,
7671 update the errors address in the recipients list. */
7673 if (i >= recipients_count && t < recipients_count)
7675 DEBUG(D_deliver) debug_printf("one_time: adding %s in place of %s\n",
7676 otaddr->address, otaddr->parent->address);
7677 receive_add_recipient(otaddr->address, t);
7678 recipients_list[recipients_count-1].errors_to = otaddr->prop.errors_address;
7679 tree_add_nonrecipient(otaddr->parent->address);
7680 update_spool = TRUE;
7684 /* Except for error messages, ensure that either the errors address for
7685 this deferred address or, if there is none, the sender address, is on the
7686 list of recipients for a warning message. */
7688 if (sender_address[0] != 0)
7689 if (addr->prop.errors_address)
7691 if (Ustrstr(recipients, addr->prop.errors_address) == NULL)
7692 recipients = string_sprintf("%s%s%s", recipients,
7693 (recipients[0] == 0)? "" : ",", addr->prop.errors_address);
7697 if (Ustrstr(recipients, sender_address) == NULL)
7698 recipients = string_sprintf("%s%s%s", recipients,
7699 (recipients[0] == 0)? "" : ",", sender_address);
7703 /* Send a warning message if the conditions are right. If the condition check
7704 fails because of a lookup defer, there is nothing we can do. The warning
7705 is not sent. Another attempt will be made at the next delivery attempt (if
7709 && delivery_attempted
7710 && ( ((addr_defer->dsn_flags & rf_dsnflags) == 0)
7711 || (addr_defer->dsn_flags & rf_notify_delay) == rf_notify_delay
7713 && delay_warning[1] > 0
7714 && sender_address[0] != 0
7715 && ( !delay_warning_condition
7716 || expand_check_condition(delay_warning_condition,
7717 US"delay_warning", US"option")
7723 int queue_time = time(NULL) - received_time;
7725 /* When running in the test harness, there's an option that allows us to
7726 fudge this time so as to get repeatability of the tests. Take the first
7727 time off the list. In queue runs, the list pointer gets updated in the
7730 if (running_in_test_harness && fudged_queue_times[0] != 0)
7732 int qt = readconf_readtime(fudged_queue_times, '/', FALSE);
7735 DEBUG(D_deliver) debug_printf("fudged queue_times = %s\n",
7736 fudged_queue_times);
7741 /* See how many warnings we should have sent by now */
7743 for (count = 0; count < delay_warning[1]; count++)
7744 if (queue_time < delay_warning[count+2]) break;
7746 show_time = delay_warning[count+1];
7748 if (count >= delay_warning[1])
7751 int last_gap = show_time;
7752 if (count > 1) last_gap -= delay_warning[count];
7753 extra = (queue_time - delay_warning[count+1])/last_gap;
7754 show_time += last_gap * extra;
7760 debug_printf("time on queue = %s\n", readconf_printtime(queue_time));
7761 debug_printf("warning counts: required %d done %d\n", count,
7765 /* We have computed the number of warnings there should have been by now.
7766 If there haven't been enough, send one, and up the count to what it should
7769 if (warning_count < count)
7773 pid_t pid = child_open_exim(&fd);
7779 FILE *f = fdopen(fd, "wb");
7781 transport_ctx tctx = {0};
7783 if (warn_message_file)
7784 if (!(wmf = Ufopen(warn_message_file, "rb")))
7785 log_write(0, LOG_MAIN|LOG_PANIC, "Failed to open %s for warning "
7786 "message texts: %s", warn_message_file, strerror(errno));
7788 warnmsg_recipients = recipients;
7789 warnmsg_delay = queue_time < 120*60
7790 ? string_sprintf("%d minutes", show_time/60)
7791 : string_sprintf("%d hours", show_time/3600);
7793 if (errors_reply_to)
7794 fprintf(f, "Reply-To: %s\n", errors_reply_to);
7795 fprintf(f, "Auto-Submitted: auto-replied\n");
7797 fprintf(f, "To: %s\n", recipients);
7799 /* generated boundary string and output MIME-Headers */
7800 bound = string_sprintf(TIME_T_FMT "-eximdsn-%d", time(NULL), rand());
7802 fprintf(f, "Content-Type: multipart/report;"
7803 " report-type=delivery-status; boundary=%s\n"
7804 "MIME-Version: 1.0\n",
7807 if ((wmf_text = next_emf(wmf, US"header")))
7808 fprintf(f, "%s\n", wmf_text);
7810 fprintf(f, "Subject: Warning: message %s delayed %s\n\n",
7811 message_id, warnmsg_delay);
7813 /* output human readable part as text/plain section */
7815 "Content-type: text/plain; charset=us-ascii\n\n",
7818 if ((wmf_text = next_emf(wmf, US"intro")))
7819 fprintf(f, "%s", CS wmf_text);
7823 "This message was created automatically by mail delivery software.\n");
7825 if (Ustrcmp(recipients, sender_address) == 0)
7827 "A message that you sent has not yet been delivered to one or more of its\n"
7828 "recipients after more than ");
7832 "A message sent by\n\n <%s>\n\n"
7833 "has not yet been delivered to one or more of its recipients after more than \n",
7836 fprintf(f, "%s on the queue on %s.\n\n"
7837 "The message identifier is: %s\n",
7838 warnmsg_delay, primary_hostname, message_id);
7840 for (h = header_list; h; h = h->next)
7841 if (strncmpic(h->text, US"Subject:", 8) == 0)
7842 fprintf(f, "The subject of the message is: %s", h->text + 9);
7843 else if (strncmpic(h->text, US"Date:", 5) == 0)
7844 fprintf(f, "The date of the message is: %s", h->text + 6);
7847 fprintf(f, "The address%s to which the message has not yet been "
7849 !addr_defer->next ? "" : "es",
7850 !addr_defer->next ? "is": "are");
7853 /* List the addresses, with error information if allowed */
7855 /* store addr_defer for machine readable part */
7856 address_item *addr_dsndefer = addr_defer;
7860 address_item *addr = addr_defer;
7861 addr_defer = addr->next;
7862 if (print_address_information(addr, f, US" ", US"\n ", US""))
7863 print_address_error(addr, f, US"Delay reason: ");
7872 if ((wmf_text = next_emf(wmf, US"final")))
7873 fprintf(f, "%s", CS wmf_text);
7879 "No action is required on your part. Delivery attempts will continue for\n"
7880 "some time, and this warning may be repeated at intervals if the message\n"
7881 "remains undelivered. Eventually the mail delivery software will give up,\n"
7882 "and when that happens, the message will be returned to you.\n");
7885 /* output machine readable part */
7886 fprintf(f, "\n--%s\n"
7887 "Content-type: message/delivery-status\n\n"
7888 "Reporting-MTA: dns; %s\n",
7890 smtp_active_hostname);
7895 /* must be decoded from xtext: see RFC 3461:6.3a */
7897 if (auth_xtextdecode(dsn_envid, &xdec_envid) > 0)
7898 fprintf(f,"Original-Envelope-ID: %s\n", dsn_envid);
7900 fprintf(f,"X-Original-Envelope-ID: error decoding xtext formatted ENVID\n");
7904 for ( ; addr_dsndefer; addr_dsndefer = addr_dsndefer->next)
7906 if (addr_dsndefer->dsn_orcpt)
7907 fprintf(f, "Original-Recipient: %s\n", addr_dsndefer->dsn_orcpt);
7909 fprintf(f, "Action: delayed\n"
7910 "Final-Recipient: rfc822;%s\n"
7912 addr_dsndefer->address);
7913 if (addr_dsndefer->host_used && addr_dsndefer->host_used->name)
7915 fprintf(f, "Remote-MTA: dns; %s\n",
7916 addr_dsndefer->host_used->name);
7917 print_dsn_diagnostic_code(addr_dsndefer, f);
7923 "Content-type: text/rfc822-headers\n\n",
7927 /* header only as required by RFC. only failure DSN needs to honor RET=FULL */
7928 tctx.options = topt_add_return_path | topt_no_body;
7929 transport_filter_argv = NULL; /* Just in case */
7930 return_path = sender_address; /* In case not previously set */
7932 /* Write the original email out */
7933 transport_write_message(fileno(f), &tctx, 0);
7936 fprintf(f,"\n--%s--\n", bound);
7940 /* Close and wait for child process to complete, without a timeout.
7941 If there's an error, don't update the count. */
7944 if (child_close(pid, 0) == 0)
7946 warning_count = count;
7947 update_spool = TRUE; /* Ensure spool rewritten */
7953 /* Clear deliver_domain */
7955 deliver_domain = NULL;
7957 /* If this was a first delivery attempt, unset the first time flag, and
7958 ensure that the spool gets updated. */
7960 if (deliver_firsttime)
7962 deliver_firsttime = FALSE;
7963 update_spool = TRUE;
7966 /* If delivery was frozen and freeze_tell is set, generate an appropriate
7967 message, unless the message is a local error message (to avoid loops). Then
7968 log the freezing. If the text in "frozen_info" came from a system filter,
7969 it has been escaped into printing characters so as not to mess up log lines.
7970 For the "tell" message, we turn \n back into newline. Also, insert a newline
7971 near the start instead of the ": " string. */
7975 if (freeze_tell && freeze_tell[0] != 0 && !local_error_message)
7977 uschar *s = string_copy(frozen_info);
7978 uschar *ss = Ustrstr(s, " by the system filter: ");
7989 if (*ss == '\\' && ss[1] == 'n')
7996 moan_tell_someone(freeze_tell, addr_defer, US"Message frozen",
7997 "Message %s has been frozen%s.\nThe sender is <%s>.\n", message_id,
8001 /* Log freezing just before we update the -H file, to minimize the chance
8002 of a race problem. */
8004 deliver_msglog("*** Frozen%s\n", frozen_info);
8005 log_write(0, LOG_MAIN, "Frozen%s", frozen_info);
8008 /* If there have been any updates to the non-recipients list, or other things
8009 that get written to the spool, we must now update the spool header file so
8010 that it has the right information for the next delivery attempt. If there
8011 was more than one address being delivered, the header_change update is done
8012 earlier, in case one succeeds and then something crashes. */
8015 debug_printf("delivery deferred: update_spool=%d header_rewritten=%d\n",
8016 update_spool, header_rewritten);
8018 if (update_spool || header_rewritten)
8019 /* Panic-dies on error */
8020 (void)spool_write_header(message_id, SW_DELIVERING, NULL);
8023 /* Finished with the message log. If the message is complete, it will have
8024 been unlinked or renamed above. */
8026 if (message_logs) (void)fclose(message_log);
8028 /* Now we can close and remove the journal file. Its only purpose is to record
8029 successfully completed deliveries asap so that this information doesn't get
8030 lost if Exim (or the machine) crashes. Forgetting about a failed delivery is
8031 not serious, as trying it again is not harmful. The journal might not be open
8032 if all addresses were deferred at routing or directing. Nevertheless, we must
8033 remove it if it exists (may have been lying around from a crash during the
8034 previous delivery attempt). We don't remove the journal if a delivery
8035 subprocess failed to pass back delivery information; this is controlled by
8036 the remove_journal flag. When the journal is left, we also don't move the
8037 message off the main spool if frozen and the option is set. It should get moved
8038 at the next attempt, after the journal has been inspected. */
8040 if (journal_fd >= 0) (void)close(journal_fd);
8044 uschar * fname = spool_fname(US"input", message_subdir, id, US"-J");
8046 if (Uunlink(fname) < 0 && errno != ENOENT)
8047 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to unlink %s: %s", fname,
8050 /* Move the message off the spool if reqested */
8052 #ifdef SUPPORT_MOVE_FROZEN_MESSAGES
8053 if (deliver_freeze && move_frozen_messages)
8054 (void)spool_move_message(id, message_subdir, US"", US"F");
8058 /* Closing the data file frees the lock; if the file has been unlinked it
8059 will go away. Otherwise the message becomes available for another process
8062 (void)close(deliver_datafile);
8063 deliver_datafile = -1;
8064 DEBUG(D_deliver) debug_printf("end delivery of %s\n", id);
8066 /* It is unlikely that there will be any cached resources, since they are
8067 released after routing, and in the delivery subprocesses. However, it's
8068 possible for an expansion for something afterwards (for example,
8069 expand_check_condition) to do a lookup. We must therefore be sure everything is
8073 acl_where = ACL_WHERE_UNKNOWN;
8082 if (!regex_PIPELINING) regex_PIPELINING =
8083 regex_must_compile(US"\\n250[\\s\\-]PIPELINING(\\s|\\n|$)", FALSE, TRUE);
8085 if (!regex_SIZE) regex_SIZE =
8086 regex_must_compile(US"\\n250[\\s\\-]SIZE(\\s|\\n|$)", FALSE, TRUE);
8088 if (!regex_AUTH) regex_AUTH =
8089 regex_must_compile(US"\\n250[\\s\\-]AUTH\\s+([\\-\\w\\s]+)(?:\\n|$)",
8093 if (!regex_STARTTLS) regex_STARTTLS =
8094 regex_must_compile(US"\\n250[\\s\\-]STARTTLS(\\s|\\n|$)", FALSE, TRUE);
8097 if (!regex_CHUNKING) regex_CHUNKING =
8098 regex_must_compile(US"\\n250[\\s\\-]CHUNKING(\\s|\\n|$)", FALSE, TRUE);
8100 #ifndef DISABLE_PRDR
8101 if (!regex_PRDR) regex_PRDR =
8102 regex_must_compile(US"\\n250[\\s\\-]PRDR(\\s|\\n|$)", FALSE, TRUE);
8106 if (!regex_UTF8) regex_UTF8 =
8107 regex_must_compile(US"\\n250[\\s\\-]SMTPUTF8(\\s|\\n|$)", FALSE, TRUE);
8110 if (!regex_DSN) regex_DSN =
8111 regex_must_compile(US"\\n250[\\s\\-]DSN(\\s|\\n|$)", FALSE, TRUE);
8113 if (!regex_IGNOREQUOTA) regex_IGNOREQUOTA =
8114 regex_must_compile(US"\\n250[\\s\\-]IGNOREQUOTA(\\s|\\n|$)", FALSE, TRUE);
8119 deliver_get_sender_address (uschar * id)
8122 uschar * new_sender_address,
8123 * save_sender_address;
8124 BOOL save_qr = queue_running;
8127 /* make spool_open_datafile non-noisy on fail */
8129 queue_running = TRUE;
8131 /* Side effect: message_subdir is set for the (possibly split) spool directory */
8133 deliver_datafile = spool_open_datafile(id);
8134 queue_running = save_qr;
8135 if (deliver_datafile < 0)
8138 /* Save and restore the global sender_address. I'm not sure if we should
8139 not save/restore all the other global variables too, because
8140 spool_read_header() may change all of them. But OTOH, when this
8141 deliver_get_sender_address() gets called, the current message is done
8142 already and nobody needs the globals anymore. (HS12, 2015-08-21) */
8144 spoolname = string_sprintf("%s-H", id);
8145 save_sender_address = sender_address;
8147 rc = spool_read_header(spoolname, TRUE, TRUE);
8149 new_sender_address = sender_address;
8150 sender_address = save_sender_address;
8152 if (rc != spool_read_OK)
8155 assert(new_sender_address);
8157 (void)close(deliver_datafile);
8158 deliver_datafile = -1;
8160 return new_sender_address;
8165 /* End of deliver.c */