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;
79 static uschar spoolname[PATH_MAX];
83 /*************************************************
84 * Make a new address item *
85 *************************************************/
87 /* This function gets the store and initializes with default values. The
88 transport_return value defaults to DEFER, so that any unexpected failure to
89 deliver does not wipe out the message. The default unique string is set to a
90 copy of the address, so that its domain can be lowercased.
93 address the RFC822 address string
94 copy force a copy of the address
96 Returns: a pointer to an initialized address_item
100 deliver_make_addr(uschar *address, BOOL copy)
102 address_item *addr = store_get(sizeof(address_item));
103 *addr = address_defaults;
104 if (copy) address = string_copy(address);
105 addr->address = address;
106 addr->unique = string_copy(address);
113 /*************************************************
114 * Set expansion values for an address *
115 *************************************************/
117 /* Certain expansion variables are valid only when handling an address or
118 address list. This function sets them up or clears the values, according to its
122 addr the address in question, or NULL to clear values
127 deliver_set_expansions(address_item *addr)
131 const uschar ***p = address_expansions;
132 while (*p) **p++ = NULL;
136 /* Exactly what gets set depends on whether there is one or more addresses, and
137 what they contain. These first ones are always set, taking their values from
138 the first address. */
140 if (!addr->host_list)
142 deliver_host = deliver_host_address = US"";
143 deliver_host_port = 0;
147 deliver_host = addr->host_list->name;
148 deliver_host_address = addr->host_list->address;
149 deliver_host_port = addr->host_list->port;
152 deliver_recipients = addr;
153 deliver_address_data = addr->prop.address_data;
154 deliver_domain_data = addr->prop.domain_data;
155 deliver_localpart_data = addr->prop.localpart_data;
157 /* These may be unset for multiple addresses */
159 deliver_domain = addr->domain;
160 self_hostname = addr->self_hostname;
162 #ifdef EXPERIMENTAL_BRIGHTMAIL
163 bmi_deliver = 1; /* deliver by default */
164 bmi_alt_location = NULL;
165 bmi_base64_verdict = NULL;
166 bmi_base64_tracker_verdict = NULL;
169 /* If there's only one address we can set everything. */
173 address_item *addr_orig;
175 deliver_localpart = addr->local_part;
176 deliver_localpart_prefix = addr->prefix;
177 deliver_localpart_suffix = addr->suffix;
179 for (addr_orig = addr; addr_orig->parent; addr_orig = addr_orig->parent) ;
180 deliver_domain_orig = addr_orig->domain;
182 /* Re-instate any prefix and suffix in the original local part. In all
183 normal cases, the address will have a router associated with it, and we can
184 choose the caseful or caseless version accordingly. However, when a system
185 filter sets up a pipe, file, or autoreply delivery, no router is involved.
186 In this case, though, there won't be any prefix or suffix to worry about. */
188 deliver_localpart_orig = !addr_orig->router
189 ? addr_orig->local_part
190 : addr_orig->router->caseful_local_part
191 ? addr_orig->cc_local_part
192 : addr_orig->lc_local_part;
194 /* If there's a parent, make its domain and local part available, and if
195 delivering to a pipe or file, or sending an autoreply, get the local
196 part from the parent. For pipes and files, put the pipe or file string
197 into address_pipe and address_file. */
201 deliver_domain_parent = addr->parent->domain;
202 deliver_localpart_parent = !addr->parent->router
203 ? addr->parent->local_part
204 : addr->parent->router->caseful_local_part
205 ? addr->parent->cc_local_part
206 : addr->parent->lc_local_part;
208 /* File deliveries have their own flag because they need to be picked out
209 as special more often. */
211 if (testflag(addr, af_pfr))
213 if (testflag(addr, af_file)) address_file = addr->local_part;
214 else if (deliver_localpart[0] == '|') address_pipe = addr->local_part;
215 deliver_localpart = addr->parent->local_part;
216 deliver_localpart_prefix = addr->parent->prefix;
217 deliver_localpart_suffix = addr->parent->suffix;
221 #ifdef EXPERIMENTAL_BRIGHTMAIL
222 /* Set expansion variables related to Brightmail AntiSpam */
223 bmi_base64_verdict = bmi_get_base64_verdict(deliver_localpart_orig, deliver_domain_orig);
224 bmi_base64_tracker_verdict = bmi_get_base64_tracker_verdict(bmi_base64_verdict);
225 /* get message delivery status (0 - don't deliver | 1 - deliver) */
226 bmi_deliver = bmi_get_delivery_status(bmi_base64_verdict);
227 /* if message is to be delivered, get eventual alternate location */
228 if (bmi_deliver == 1)
229 bmi_alt_location = bmi_get_alt_location(bmi_base64_verdict);
234 /* For multiple addresses, don't set local part, and leave the domain and
235 self_hostname set only if it is the same for all of them. It is possible to
236 have multiple pipe and file addresses, but only when all addresses have routed
237 to the same pipe or file. */
242 if (testflag(addr, af_pfr))
244 if (testflag(addr, af_file)) address_file = addr->local_part;
245 else if (addr->local_part[0] == '|') address_pipe = addr->local_part;
247 for (addr2 = addr->next; addr2; addr2 = addr2->next)
249 if (deliver_domain && Ustrcmp(deliver_domain, addr2->domain) != 0)
250 deliver_domain = NULL;
252 && ( !addr2->self_hostname
253 || Ustrcmp(self_hostname, addr2->self_hostname) != 0
255 self_hostname = NULL;
256 if (!deliver_domain && !self_hostname) break;
264 /*************************************************
265 * Open a msglog file *
266 *************************************************/
268 /* This function is used both for normal message logs, and for files in the
269 msglog directory that are used to catch output from pipes. Try to create the
270 directory if it does not exist. From release 4.21, normal message logs should
271 be created when the message is received.
274 filename the file name
275 mode the mode required
276 error used for saying what failed
278 Returns: a file descriptor, or -1 (with errno set)
282 open_msglog_file(uschar *filename, int mode, uschar **error)
284 int fd = Uopen(filename, O_WRONLY|O_APPEND|O_CREAT, mode);
286 if (fd < 0 && errno == ENOENT)
289 sprintf(CS temp, "msglog/%s", message_subdir);
290 if (message_subdir[0] == 0) temp[6] = 0;
291 (void)directory_make(spool_directory, temp, MSGLOG_DIRECTORY_MODE, TRUE);
292 fd = Uopen(filename, O_WRONLY|O_APPEND|O_CREAT, mode);
295 /* Set the close-on-exec flag and change the owner to the exim uid/gid (this
296 function is called as root). Double check the mode, because the group setting
297 doesn't always get set automatically. */
301 (void)fcntl(fd, F_SETFD, fcntl(fd, F_GETFD) | FD_CLOEXEC);
302 if (fchown(fd, exim_uid, exim_gid) < 0)
307 if (fchmod(fd, mode) < 0)
313 else *error = US"create";
321 /*************************************************
322 * Write to msglog if required *
323 *************************************************/
325 /* Write to the message log, if configured. This function may also be called
329 format a string format
335 deliver_msglog(const char *format, ...)
338 if (!message_logs) return;
339 va_start(ap, format);
340 vfprintf(message_log, format, ap);
348 /*************************************************
349 * Replicate status for batch *
350 *************************************************/
352 /* When a transport handles a batch of addresses, it may treat them
353 individually, or it may just put the status in the first one, and return FALSE,
354 requesting that the status be copied to all the others externally. This is the
355 replication function. As well as the status, it copies the transport pointer,
356 which may have changed if appendfile passed the addresses on to a different
359 Argument: pointer to the first address in a chain
364 replicate_status(address_item *addr)
367 for (addr2 = addr->next; addr2; addr2 = addr2->next)
369 addr2->transport = addr->transport;
370 addr2->transport_return = addr->transport_return;
371 addr2->basic_errno = addr->basic_errno;
372 addr2->more_errno = addr->more_errno;
373 addr2->special_action = addr->special_action;
374 addr2->message = addr->message;
375 addr2->user_message = addr->user_message;
381 /*************************************************
382 * Compare lists of hosts *
383 *************************************************/
385 /* This function is given two pointers to chains of host items, and it yields
386 TRUE if the lists refer to the same hosts in the same order, except that
388 (1) Multiple hosts with the same non-negative MX values are permitted to appear
389 in different orders. Round-robinning nameservers can cause this to happen.
391 (2) Multiple hosts with the same negative MX values less than MX_NONE are also
392 permitted to appear in different orders. This is caused by randomizing
395 This enables Exim to use a single SMTP transaction for sending to two entirely
396 different domains that happen to end up pointing at the same hosts.
399 one points to the first host list
400 two points to the second host list
402 Returns: TRUE if the lists refer to the same host set
406 same_hosts(host_item *one, host_item *two)
410 if (Ustrcmp(one->name, two->name) != 0)
413 host_item *end_one = one;
414 host_item *end_two = two;
416 /* Batch up only if there was no MX and the list was not randomized */
418 if (mx == MX_NONE) return FALSE;
420 /* Find the ends of the shortest sequence of identical MX values */
422 while ( end_one->next && end_one->next->mx == mx
423 && end_two->next && end_two->next->mx == mx)
425 end_one = end_one->next;
426 end_two = end_two->next;
429 /* If there aren't any duplicates, there's no match. */
431 if (end_one == one) return FALSE;
433 /* For each host in the 'one' sequence, check that it appears in the 'two'
434 sequence, returning FALSE if not. */
439 for (hi = two; hi != end_two->next; hi = hi->next)
440 if (Ustrcmp(one->name, hi->name) == 0) break;
441 if (hi == end_two->next) return FALSE;
442 if (one == end_one) break;
446 /* All the hosts in the 'one' sequence were found in the 'two' sequence.
447 Ensure both are pointing at the last host, and carry on as for equality. */
458 /* True if both are NULL */
465 /*************************************************
466 * Compare header lines *
467 *************************************************/
469 /* This function is given two pointers to chains of header items, and it yields
470 TRUE if they are the same header texts in the same order.
473 one points to the first header list
474 two points to the second header list
476 Returns: TRUE if the lists refer to the same header set
480 same_headers(header_line *one, header_line *two)
482 for (;; one = one->next, two = two->next)
484 if (one == two) return TRUE; /* Includes the case where both NULL */
485 if (!one || !two) return FALSE;
486 if (Ustrcmp(one->text, two->text) != 0) return FALSE;
492 /*************************************************
493 * Compare string settings *
494 *************************************************/
496 /* This function is given two pointers to strings, and it returns
497 TRUE if they are the same pointer, or if the two strings are the same.
500 one points to the first string
501 two points to the second string
503 Returns: TRUE or FALSE
507 same_strings(uschar *one, uschar *two)
509 if (one == two) return TRUE; /* Includes the case where both NULL */
510 if (!one || !two) return FALSE;
511 return (Ustrcmp(one, two) == 0);
516 /*************************************************
517 * Compare uid/gid for addresses *
518 *************************************************/
520 /* This function is given a transport and two addresses. It yields TRUE if the
521 uid/gid/initgroups settings for the two addresses are going to be the same when
526 addr1 the first address
527 addr2 the second address
529 Returns: TRUE or FALSE
533 same_ugid(transport_instance *tp, address_item *addr1, address_item *addr2)
535 if ( !tp->uid_set && !tp->expand_uid
536 && !tp->deliver_as_creator
537 && ( testflag(addr1, af_uid_set) != testflag(addr2, af_gid_set)
538 || ( testflag(addr1, af_uid_set)
539 && ( addr1->uid != addr2->uid
540 || testflag(addr1, af_initgroups) != testflag(addr2, af_initgroups)
544 if ( !tp->gid_set && !tp->expand_gid
545 && ( testflag(addr1, af_gid_set) != testflag(addr2, af_gid_set)
546 || ( testflag(addr1, af_gid_set)
547 && addr1->gid != addr2->gid
557 /*************************************************
558 * Record that an address is complete *
559 *************************************************/
561 /* This function records that an address is complete. This is straightforward
562 for most addresses, where the unique address is just the full address with the
563 domain lower cased. For homonyms (addresses that are the same as one of their
564 ancestors) their are complications. Their unique addresses have \x\ prepended
565 (where x = 0, 1, 2...), so that de-duplication works correctly for siblings and
568 Exim used to record the unique addresses of homonyms as "complete". This,
569 however, fails when the pattern of redirection varies over time (e.g. if taking
570 unseen copies at only some times of day) because the prepended numbers may vary
571 from one delivery run to the next. This problem is solved by never recording
572 prepended unique addresses as complete. Instead, when a homonymic address has
573 actually been delivered via a transport, we record its basic unique address
574 followed by the name of the transport. This is checked in subsequent delivery
575 runs whenever an address is routed to a transport.
577 If the completed address is a top-level one (has no parent, which means it
578 cannot be homonymic) we also add the original address to the non-recipients
579 tree, so that it gets recorded in the spool file and therefore appears as
580 "done" in any spool listings. The original address may differ from the unique
581 address in the case of the domain.
583 Finally, this function scans the list of duplicates, marks as done any that
584 match this address, and calls child_done() for their ancestors.
587 addr address item that has been completed
588 now current time as a string
594 address_done(address_item *addr, uschar *now)
598 update_spool = TRUE; /* Ensure spool gets updated */
600 /* Top-level address */
604 tree_add_nonrecipient(addr->unique);
605 tree_add_nonrecipient(addr->address);
608 /* Homonymous child address */
610 else if (testflag(addr, af_homonym))
613 tree_add_nonrecipient(
614 string_sprintf("%s/%s", addr->unique + 3, addr->transport->name));
617 /* Non-homonymous child address */
619 else tree_add_nonrecipient(addr->unique);
621 /* Check the list of duplicate addresses and ensure they are now marked
624 for (dup = addr_duplicate; dup; dup = dup->next)
625 if (Ustrcmp(addr->unique, dup->unique) == 0)
627 tree_add_nonrecipient(dup->unique);
628 child_done(dup, now);
635 /*************************************************
636 * Decrease counts in parents and mark done *
637 *************************************************/
639 /* This function is called when an address is complete. If there is a parent
640 address, its count of children is decremented. If there are still other
641 children outstanding, the function exits. Otherwise, if the count has become
642 zero, address_done() is called to mark the parent and its duplicates complete.
643 Then loop for any earlier ancestors.
646 addr points to the completed address item
647 now the current time as a string, for writing to the message log
653 child_done(address_item *addr, uschar *now)
659 if ((addr->child_count -= 1) > 0) return; /* Incomplete parent */
660 address_done(addr, now);
662 /* Log the completion of all descendents only when there is no ancestor with
663 the same original address. */
665 for (aa = addr->parent; aa; aa = aa->parent)
666 if (Ustrcmp(aa->address, addr->address) == 0) break;
669 deliver_msglog("%s %s: children all complete\n", now, addr->address);
670 DEBUG(D_deliver) debug_printf("%s: children all complete\n", addr->address);
676 /*************************************************
677 * Delivery logging support functions *
678 *************************************************/
680 /* The LOGGING() checks in d_log_interface() are complicated for backwards
681 compatibility. When outgoing interface logging was originally added, it was
682 conditional on just incoming_interface (which is off by default). The
683 outgoing_interface option is on by default to preserve this behaviour, but
684 you can enable incoming_interface and disable outgoing_interface to get I=
685 fields on incoming lines only.
688 s The log line buffer
689 sizep Pointer to the buffer size
690 ptrp Pointer to current index into buffer
691 addr The address to be logged
693 Returns: New value for s
697 d_log_interface(uschar *s, int *sizep, int *ptrp)
699 if (LOGGING(incoming_interface) && LOGGING(outgoing_interface)
700 && sending_ip_address)
702 s = string_append(s, sizep, ptrp, 2, US" I=[", sending_ip_address);
703 s = LOGGING(outgoing_port)
704 ? string_append(s, sizep, ptrp, 2, US"]:",
705 string_sprintf("%d", sending_port))
706 : string_cat(s, sizep, ptrp, US"]", 1);
714 d_hostlog(uschar *s, int *sizep, int *ptrp, address_item *addr)
716 s = string_append(s, sizep, ptrp, 5, US" H=", addr->host_used->name,
717 US" [", addr->host_used->address, US"]");
718 if (LOGGING(outgoing_port))
719 s = string_append(s, sizep, ptrp, 2, US":", string_sprintf("%d",
720 addr->host_used->port));
723 if (LOGGING(proxy) && proxy_local_address)
725 s = string_append(s, sizep, ptrp, 3, US" PRX=[", proxy_local_address, US"]");
726 if (LOGGING(outgoing_port))
727 s = string_append(s, sizep, ptrp, 2, US":", string_sprintf("%d",
732 return d_log_interface(s, sizep, ptrp);
741 d_tlslog(uschar * s, int * sizep, int * ptrp, address_item * addr)
743 if (LOGGING(tls_cipher) && addr->cipher)
744 s = string_append(s, sizep, ptrp, 2, US" X=", addr->cipher);
745 if (LOGGING(tls_certificate_verified) && addr->cipher)
746 s = string_append(s, sizep, ptrp, 2, US" CV=",
747 testflag(addr, af_cert_verified)
749 #ifdef EXPERIMENTAL_DANE
750 testflag(addr, af_dane_verified)
756 if (LOGGING(tls_peerdn) && addr->peerdn)
757 s = string_append(s, sizep, ptrp, 3, US" DN=\"",
758 string_printing(addr->peerdn), US"\"");
766 #ifndef DISABLE_EVENT
768 event_raise(uschar * action, const uschar * event, uschar * ev_data)
774 debug_printf("Event(%s): event_action=|%s| delivery_IP=%s\n",
776 action, deliver_host_address);
779 event_data = ev_data;
781 if (!(s = expand_string(action)) && *expand_string_message)
782 log_write(0, LOG_MAIN|LOG_PANIC,
783 "failed to expand event_action %s in %s: %s\n",
784 event, transport_name, expand_string_message);
786 event_name = event_data = NULL;
788 /* If the expansion returns anything but an empty string, flag for
789 the caller to modify his normal processing
794 debug_printf("Event(%s): event_action returned \"%s\"\n", event, s);
802 msg_event_raise(const uschar * event, const address_item * addr)
804 const uschar * save_domain = deliver_domain;
805 uschar * save_local = deliver_localpart;
806 const uschar * save_host = deliver_host;
807 const uschar * save_address = deliver_host_address;
808 const int save_port = deliver_host_port;
810 if (!addr->transport)
813 router_name = addr->router ? addr->router->name : NULL;
814 transport_name = addr->transport->name;
815 deliver_domain = addr->domain;
816 deliver_localpart = addr->local_part;
817 deliver_host = addr->host_used ? addr->host_used->name : NULL;
819 (void) event_raise(addr->transport->event_action, event,
821 || Ustrcmp(addr->transport->driver_name, "smtp") == 0
822 || Ustrcmp(addr->transport->driver_name, "lmtp") == 0
823 ? addr->message : NULL);
825 deliver_host_port = save_port;
826 deliver_host_address = save_address;
827 deliver_host = save_host;
828 deliver_localpart = save_local;
829 deliver_domain = save_domain;
830 router_name = transport_name = NULL;
832 #endif /*DISABLE_EVENT*/
836 /* If msg is NULL this is a delivery log and logchar is used. Otherwise
837 this is a nonstandard call; no two-character delivery flag is written
838 but sender-host and sender are prefixed and "msg" is inserted in the log line.
841 flags passed to log_write()
844 delivery_log(int flags, address_item * addr, int logchar, uschar * msg)
847 int size = 256; /* Used for a temporary, */
848 int ptr = 0; /* expanding buffer, for */
849 uschar *s; /* building log lines; */
850 void *reset_point; /* released afterwards. */
852 /* Log the delivery on the main log. We use an extensible string to build up
853 the log line, and reset the store afterwards. Remote deliveries should always
854 have a pointer to the host item that succeeded; local deliveries can have a
855 pointer to a single host item in their host list, for use by the transport. */
857 #ifndef DISABLE_EVENT
858 /* presume no successful remote delivery */
859 lookup_dnssec_authenticated = NULL;
862 s = reset_point = store_get(size);
864 log_address = string_log_address(addr, LOGGING(all_parents), TRUE);
866 s = string_append(s, &size, &ptr, 3, host_and_ident(TRUE), US" ", log_address);
870 s = string_append(s, &size, &ptr, 2, US"> ", log_address);
873 if (LOGGING(sender_on_delivery) || msg)
874 s = string_append(s, &size, &ptr, 3, US" F=<",
876 testflag(addr, af_utf8_downcvt)
877 ? string_address_utf8_to_alabel(sender_address, NULL)
883 #ifdef EXPERIMENTAL_SRS
884 if(addr->prop.srs_sender)
885 s = string_append(s, &size, &ptr, 3, US" SRS=<", addr->prop.srs_sender, US">");
888 /* You might think that the return path must always be set for a successful
889 delivery; indeed, I did for some time, until this statement crashed. The case
890 when it is not set is for a delivery to /dev/null which is optimised by not
893 if (used_return_path && LOGGING(return_path_on_delivery))
894 s = string_append(s, &size, &ptr, 3, US" P=<", used_return_path, US">");
897 s = string_append(s, &size, &ptr, 2, US" ", msg);
899 /* For a delivery from a system filter, there may not be a router */
901 s = string_append(s, &size, &ptr, 2, US" R=", addr->router->name);
903 s = string_append(s, &size, &ptr, 2, US" T=", addr->transport->name);
905 if (LOGGING(delivery_size))
906 s = string_append(s, &size, &ptr, 2, US" S=",
907 string_sprintf("%d", transport_count));
911 if (addr->transport->info->local)
914 s = string_append(s, &size, &ptr, 2, US" H=", addr->host_list->name);
915 s = d_log_interface(s, &size, &ptr);
916 if (addr->shadow_message)
917 s = string_cat(s, &size, &ptr, addr->shadow_message,
918 Ustrlen(addr->shadow_message));
921 /* Remote delivery */
927 s = d_hostlog(s, &size, &ptr, addr);
928 if (continue_sequence > 1)
929 s = string_cat(s, &size, &ptr, US"*", 1);
931 #ifndef DISABLE_EVENT
932 deliver_host_address = addr->host_used->address;
933 deliver_host_port = addr->host_used->port;
934 deliver_host = addr->host_used->name;
936 /* DNS lookup status */
937 lookup_dnssec_authenticated = addr->host_used->dnssec==DS_YES ? US"yes"
938 : addr->host_used->dnssec==DS_NO ? US"no"
944 s = d_tlslog(s, &size, &ptr, addr);
947 if (addr->authenticator)
949 s = string_append(s, &size, &ptr, 2, US" A=", addr->authenticator);
952 s = string_append(s, &size, &ptr, 2, US":", addr->auth_id);
953 if (LOGGING(smtp_mailauth) && addr->auth_sndr)
954 s = string_append(s, &size, &ptr, 2, US":", addr->auth_sndr);
959 if (addr->flags & af_prdr_used)
960 s = string_append(s, &size, &ptr, 1, US" PRDR");
964 /* confirmation message (SMTP (host_used) and LMTP (driver_name)) */
966 if ( LOGGING(smtp_confirmation)
968 && (addr->host_used || Ustrcmp(addr->transport->driver_name, "lmtp") == 0)
972 unsigned lim = big_buffer_size < 1024 ? big_buffer_size : 1024;
973 uschar *p = big_buffer;
974 uschar *ss = addr->message;
976 for (i = 0; i < lim && ss[i] != 0; i++) /* limit logged amount */
978 if (ss[i] == '\"' || ss[i] == '\\') *p++ = '\\'; /* quote \ and " */
983 s = string_append(s, &size, &ptr, 2, US" C=", big_buffer);
986 /* Time on queue and actual time taken to deliver */
988 if (LOGGING(queue_time))
989 s = string_append(s, &size, &ptr, 2, US" QT=",
990 readconf_printtime( (int) ((long)time(NULL) - (long)received_time)) );
992 if (LOGGING(deliver_time))
993 s = string_append(s, &size, &ptr, 2, US" DT=",
994 readconf_printtime(addr->more_errno));
996 /* string_cat() always leaves room for the terminator. Release the
997 store we used to build the line after writing it. */
1000 log_write(0, flags, "%s", s);
1002 #ifndef DISABLE_EVENT
1003 if (!msg) msg_event_raise(US"msg:delivery", addr);
1006 store_reset(reset_point);
1012 /*************************************************
1013 * Actions at the end of handling an address *
1014 *************************************************/
1016 /* This is a function for processing a single address when all that can be done
1017 with it has been done.
1020 addr points to the address block
1021 result the result of the delivery attempt
1022 logflags flags for log_write() (LOG_MAIN and/or LOG_PANIC)
1023 driver_type indicates which type of driver (transport, or router) was last
1024 to process the address
1025 logchar '=' or '-' for use when logging deliveries with => or ->
1031 post_process_one(address_item *addr, int result, int logflags, int driver_type,
1034 uschar *now = tod_stamp(tod_log);
1035 uschar *driver_kind = NULL;
1036 uschar *driver_name = NULL;
1037 uschar *log_address;
1039 int size = 256; /* Used for a temporary, */
1040 int ptr = 0; /* expanding buffer, for */
1041 uschar *s; /* building log lines; */
1042 void *reset_point; /* released afterwards. */
1044 DEBUG(D_deliver) debug_printf("post-process %s (%d)\n", addr->address, result);
1046 /* Set up driver kind and name for logging. Disable logging if the router or
1047 transport has disabled it. */
1049 if (driver_type == DTYPE_TRANSPORT)
1051 if (addr->transport)
1053 driver_name = addr->transport->name;
1054 driver_kind = US" transport";
1055 disable_logging = addr->transport->disable_logging;
1057 else driver_kind = US"transporting";
1059 else if (driver_type == DTYPE_ROUTER)
1063 driver_name = addr->router->name;
1064 driver_kind = US" router";
1065 disable_logging = addr->router->disable_logging;
1067 else driver_kind = US"routing";
1070 /* If there's an error message set, ensure that it contains only printing
1071 characters - it should, but occasionally things slip in and this at least
1072 stops the log format from getting wrecked. We also scan the message for an LDAP
1073 expansion item that has a password setting, and flatten the password. This is a
1074 fudge, but I don't know a cleaner way of doing this. (If the item is badly
1075 malformed, it won't ever have gone near LDAP.) */
1079 const uschar * s = string_printing(addr->message);
1080 if (s != addr->message)
1081 addr->message = US s;
1082 /* deconst cast ok as string_printing known to have alloc'n'copied */
1083 if ( ( Ustrstr(s, "failed to expand") != NULL
1084 || Ustrstr(s, "expansion of ") != NULL
1086 && ( Ustrstr(s, "mysql") != NULL
1087 || Ustrstr(s, "pgsql") != NULL
1088 || Ustrstr(s, "redis") != NULL
1089 || Ustrstr(s, "sqlite") != NULL
1090 || Ustrstr(s, "ldap:") != NULL
1091 || Ustrstr(s, "ldapdn:") != NULL
1092 || Ustrstr(s, "ldapm:") != NULL
1094 addr->message = string_sprintf("Temporary internal error");
1097 /* If we used a transport that has one of the "return_output" options set, and
1098 if it did in fact generate some output, then for return_output we treat the
1099 message as failed if it was not already set that way, so that the output gets
1100 returned to the sender, provided there is a sender to send it to. For
1101 return_fail_output, do this only if the delivery failed. Otherwise we just
1102 unlink the file, and remove the name so that if the delivery failed, we don't
1103 try to send back an empty or unwanted file. The log_output options operate only
1104 on a non-empty file.
1106 In any case, we close the message file, because we cannot afford to leave a
1107 file-descriptor for one address while processing (maybe very many) others. */
1109 if (addr->return_file >= 0 && addr->return_filename)
1111 BOOL return_output = FALSE;
1112 struct stat statbuf;
1113 (void)EXIMfsync(addr->return_file);
1115 /* If there is no output, do nothing. */
1117 if (fstat(addr->return_file, &statbuf) == 0 && statbuf.st_size > 0)
1119 transport_instance *tb = addr->transport;
1121 /* Handle logging options */
1124 || result == FAIL && tb->log_fail_output
1125 || result == DEFER && tb->log_defer_output
1129 FILE *f = Ufopen(addr->return_filename, "rb");
1131 log_write(0, LOG_MAIN|LOG_PANIC, "failed to open %s to log output "
1132 "from %s transport: %s", addr->return_filename, tb->name,
1135 if ((s = US Ufgets(big_buffer, big_buffer_size, f)))
1137 uschar *p = big_buffer + Ustrlen(big_buffer);
1139 while (p > big_buffer && isspace(p[-1])) p--;
1141 sp = string_printing(big_buffer);
1142 log_write(0, LOG_MAIN, "<%s>: %s transport output: %s",
1143 addr->address, tb->name, sp);
1148 /* Handle returning options, but only if there is an address to return
1151 if (sender_address[0] != 0 || addr->prop.errors_address)
1152 if (tb->return_output)
1154 addr->transport_return = result = FAIL;
1155 if (addr->basic_errno == 0 && !addr->message)
1156 addr->message = US"return message generated";
1157 return_output = TRUE;
1160 if (tb->return_fail_output && result == FAIL) return_output = TRUE;
1163 /* Get rid of the file unless it might be returned, but close it in
1168 Uunlink(addr->return_filename);
1169 addr->return_filename = NULL;
1170 addr->return_file = -1;
1173 (void)close(addr->return_file);
1176 /* The success case happens only after delivery by a transport. */
1180 addr->next = addr_succeed;
1181 addr_succeed = addr;
1183 /* Call address_done() to ensure that we don't deliver to this address again,
1184 and write appropriate things to the message log. If it is a child address, we
1185 call child_done() to scan the ancestors and mark them complete if this is the
1186 last child to complete. */
1188 address_done(addr, now);
1189 DEBUG(D_deliver) debug_printf("%s delivered\n", addr->address);
1192 deliver_msglog("%s %s: %s%s succeeded\n", now, addr->address,
1193 driver_name, driver_kind);
1196 deliver_msglog("%s %s <%s>: %s%s succeeded\n", now, addr->address,
1197 addr->parent->address, driver_name, driver_kind);
1198 child_done(addr, now);
1201 /* Certificates for logging (via events) */
1203 tls_out.ourcert = addr->ourcert;
1204 addr->ourcert = NULL;
1205 tls_out.peercert = addr->peercert;
1206 addr->peercert = NULL;
1208 tls_out.cipher = addr->cipher;
1209 tls_out.peerdn = addr->peerdn;
1210 tls_out.ocsp = addr->ocsp;
1211 # ifdef EXPERIMENTAL_DANE
1212 tls_out.dane_verified = testflag(addr, af_dane_verified);
1216 delivery_log(LOG_MAIN, addr, logchar, NULL);
1219 tls_free_cert(&tls_out.ourcert);
1220 tls_free_cert(&tls_out.peercert);
1221 tls_out.cipher = NULL;
1222 tls_out.peerdn = NULL;
1223 tls_out.ocsp = OCSP_NOT_REQ;
1224 # ifdef EXPERIMENTAL_DANE
1225 tls_out.dane_verified = FALSE;
1231 /* Soft failure, or local delivery process failed; freezing may be
1234 else if (result == DEFER || result == PANIC)
1236 if (result == PANIC) logflags |= LOG_PANIC;
1238 /* This puts them on the chain in reverse order. Do not change this, because
1239 the code for handling retries assumes that the one with the retry
1240 information is last. */
1242 addr->next = addr_defer;
1245 /* The only currently implemented special action is to freeze the
1246 message. Logging of this is done later, just before the -H file is
1249 if (addr->special_action == SPECIAL_FREEZE)
1251 deliver_freeze = TRUE;
1252 deliver_frozen_at = time(NULL);
1253 update_spool = TRUE;
1256 /* If doing a 2-stage queue run, we skip writing to either the message
1257 log or the main log for SMTP defers. */
1259 if (!queue_2stage || addr->basic_errno != 0)
1263 /* For errors of the type "retry time not reached" (also remotes skipped
1264 on queue run), logging is controlled by L_retry_defer. Note that this kind
1265 of error number is negative, and all the retry ones are less than any
1268 unsigned int use_log_selector = addr->basic_errno <= ERRNO_RETRY_BASE
1269 ? L_retry_defer : 0;
1271 /* Build up the line that is used for both the message log and the main
1274 s = reset_point = store_get(size);
1276 /* Create the address string for logging. Must not do this earlier, because
1277 an OK result may be changed to FAIL when a pipe returns text. */
1279 log_address = string_log_address(addr, LOGGING(all_parents), result == OK);
1281 s = string_cat(s, &size, &ptr, log_address, Ustrlen(log_address));
1283 /* Either driver_name contains something and driver_kind contains
1284 " router" or " transport" (note the leading space), or driver_name is
1285 a null string and driver_kind contains "routing" without the leading
1286 space, if all routing has been deferred. When a domain has been held,
1287 so nothing has been done at all, both variables contain null strings. */
1291 if (driver_kind[1] == 't' && addr->router)
1292 s = string_append(s, &size, &ptr, 2, US" R=", addr->router->name);
1294 ss[1] = toupper(driver_kind[1]);
1295 s = string_append(s, &size, &ptr, 2, ss, driver_name);
1297 else if (driver_kind)
1298 s = string_append(s, &size, &ptr, 2, US" ", driver_kind);
1300 sprintf(CS ss, " defer (%d)", addr->basic_errno);
1301 s = string_cat(s, &size, &ptr, ss, Ustrlen(ss));
1303 if (addr->basic_errno > 0)
1304 s = string_append(s, &size, &ptr, 2, US": ",
1305 US strerror(addr->basic_errno));
1307 if (addr->host_used)
1309 s = string_append(s, &size, &ptr, 5,
1310 US" H=", addr->host_used->name,
1311 US" [", addr->host_used->address, US"]");
1312 if (LOGGING(outgoing_port))
1314 int port = addr->host_used->port;
1315 s = string_append(s, &size, &ptr, 2,
1316 US":", port == PORT_NONE ? US"25" : string_sprintf("%d", port));
1321 s = string_append(s, &size, &ptr, 2, US": ", addr->message);
1325 /* Log the deferment in the message log, but don't clutter it
1326 up with retry-time defers after the first delivery attempt. */
1328 if (deliver_firsttime || addr->basic_errno > ERRNO_RETRY_BASE)
1329 deliver_msglog("%s %s\n", now, s);
1331 /* Write the main log and reset the store */
1333 log_write(use_log_selector, logflags, "== %s", s);
1334 store_reset(reset_point);
1339 /* Hard failure. If there is an address to which an error message can be sent,
1340 put this address on the failed list. If not, put it on the deferred list and
1341 freeze the mail message for human attention. The latter action can also be
1342 explicitly requested by a router or transport. */
1346 /* If this is a delivery error, or a message for which no replies are
1347 wanted, and the message's age is greater than ignore_bounce_errors_after,
1348 force the af_ignore_error flag. This will cause the address to be discarded
1349 later (with a log entry). */
1351 if (sender_address[0] == 0 && message_age >= ignore_bounce_errors_after)
1352 setflag(addr, af_ignore_error);
1354 /* Freeze the message if requested, or if this is a bounce message (or other
1355 message with null sender) and this address does not have its own errors
1356 address. However, don't freeze if errors are being ignored. The actual code
1357 to ignore occurs later, instead of sending a message. Logging of freezing
1358 occurs later, just before writing the -H file. */
1360 if ( !testflag(addr, af_ignore_error)
1361 && ( addr->special_action == SPECIAL_FREEZE
1362 || (sender_address[0] == 0 && !addr->prop.errors_address)
1365 frozen_info = addr->special_action == SPECIAL_FREEZE
1367 : sender_local && !local_error_message
1368 ? US" (message created with -f <>)"
1369 : US" (delivery error message)";
1370 deliver_freeze = TRUE;
1371 deliver_frozen_at = time(NULL);
1372 update_spool = TRUE;
1374 /* The address is put on the defer rather than the failed queue, because
1375 the message is being retained. */
1377 addr->next = addr_defer;
1381 /* Don't put the address on the nonrecipients tree yet; wait until an
1382 error message has been successfully sent. */
1386 addr->next = addr_failed;
1390 /* Build up the log line for the message and main logs */
1392 s = reset_point = store_get(size);
1394 /* Create the address string for logging. Must not do this earlier, because
1395 an OK result may be changed to FAIL when a pipe returns text. */
1397 log_address = string_log_address(addr, LOGGING(all_parents), result == OK);
1399 s = string_cat(s, &size, &ptr, log_address, Ustrlen(log_address));
1401 if (LOGGING(sender_on_delivery))
1402 s = string_append(s, &size, &ptr, 3, US" F=<", sender_address, US">");
1404 /* Return path may not be set if no delivery actually happened */
1406 if (used_return_path && LOGGING(return_path_on_delivery))
1407 s = string_append(s, &size, &ptr, 3, US" P=<", used_return_path, US">");
1410 s = string_append(s, &size, &ptr, 2, US" R=", addr->router->name);
1411 if (addr->transport)
1412 s = string_append(s, &size, &ptr, 2, US" T=", addr->transport->name);
1414 if (addr->host_used)
1415 s = d_hostlog(s, &size, &ptr, addr);
1418 s = d_tlslog(s, &size, &ptr, addr);
1421 if (addr->basic_errno > 0)
1422 s = string_append(s, &size, &ptr, 2, US": ",
1423 US strerror(addr->basic_errno));
1426 s = string_append(s, &size, &ptr, 2, US": ", addr->message);
1430 /* Do the logging. For the message log, "routing failed" for those cases,
1431 just to make it clearer. */
1434 deliver_msglog("%s %s\n", now, s);
1436 deliver_msglog("%s %s failed for %s\n", now, driver_kind, s);
1438 log_write(0, LOG_MAIN, "** %s", s);
1440 #ifndef DISABLE_EVENT
1441 msg_event_raise(US"msg:fail:delivery", addr);
1444 store_reset(reset_point);
1447 /* Ensure logging is turned on again in all cases */
1449 disable_logging = FALSE;
1455 /*************************************************
1456 * Address-independent error *
1457 *************************************************/
1459 /* This function is called when there's an error that is not dependent on a
1460 particular address, such as an expansion string failure. It puts the error into
1461 all the addresses in a batch, logs the incident on the main and panic logs, and
1462 clears the expansions. It is mostly called from local_deliver(), but can be
1463 called for a remote delivery via findugid().
1466 logit TRUE if (MAIN+PANIC) logging required
1467 addr the first of the chain of addresses
1469 format format string for error message, or NULL if already set in addr
1470 ... arguments for the format
1476 common_error(BOOL logit, address_item *addr, int code, uschar *format, ...)
1478 address_item *addr2;
1479 addr->basic_errno = code;
1485 va_start(ap, format);
1486 if (!string_vformat(buffer, sizeof(buffer), CS format, ap))
1487 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
1488 "common_error expansion was longer than " SIZE_T_FMT, sizeof(buffer));
1490 addr->message = string_copy(buffer);
1493 for (addr2 = addr->next; addr2; addr2 = addr2->next)
1495 addr2->basic_errno = code;
1496 addr2->message = addr->message;
1499 if (logit) log_write(0, LOG_MAIN|LOG_PANIC, "%s", addr->message);
1500 deliver_set_expansions(NULL);
1506 /*************************************************
1507 * Check a "never users" list *
1508 *************************************************/
1510 /* This function is called to check whether a uid is on one of the two "never
1514 uid the uid to be checked
1515 nusers the list to be scanned; the first item in the list is the count
1517 Returns: TRUE if the uid is on the list
1521 check_never_users(uid_t uid, uid_t *nusers)
1524 if (!nusers) return FALSE;
1525 for (i = 1; i <= (int)(nusers[0]); i++) if (nusers[i] == uid) return TRUE;
1531 /*************************************************
1532 * Find uid and gid for a transport *
1533 *************************************************/
1535 /* This function is called for both local and remote deliveries, to find the
1536 uid/gid under which to run the delivery. The values are taken preferentially
1537 from the transport (either explicit or deliver_as_creator), then from the
1538 address (i.e. the router), and if nothing is set, the exim uid/gid are used. If
1539 the resulting uid is on the "never_users" or the "fixed_never_users" list, a
1540 panic error is logged, and the function fails (which normally leads to delivery
1544 addr the address (possibly a chain)
1546 uidp pointer to uid field
1547 gidp pointer to gid field
1548 igfp pointer to the use_initgroups field
1550 Returns: FALSE if failed - error has been set in address(es)
1554 findugid(address_item *addr, transport_instance *tp, uid_t *uidp, gid_t *gidp,
1558 BOOL gid_set = FALSE;
1560 /* Default initgroups flag comes from the transport */
1562 *igfp = tp->initgroups;
1564 /* First see if there's a gid on the transport, either fixed or expandable.
1565 The expanding function always logs failure itself. */
1572 else if (tp->expand_gid)
1574 if (!route_find_expanded_group(tp->expand_gid, tp->name, US"transport", gidp,
1577 common_error(FALSE, addr, ERRNO_GIDFAIL, NULL);
1583 /* If the transport did not set a group, see if the router did. */
1585 if (!gid_set && testflag(addr, af_gid_set))
1591 /* Pick up a uid from the transport if one is set. */
1593 if (tp->uid_set) *uidp = tp->uid;
1595 /* Otherwise, try for an expandable uid field. If it ends up as a numeric id,
1596 it does not provide a passwd value from which a gid can be taken. */
1598 else if (tp->expand_uid)
1601 if (!route_find_expanded_user(tp->expand_uid, tp->name, US"transport", &pw,
1602 uidp, &(addr->message)))
1604 common_error(FALSE, addr, ERRNO_UIDFAIL, NULL);
1614 /* If the transport doesn't set the uid, test the deliver_as_creator flag. */
1616 else if (tp->deliver_as_creator)
1618 *uidp = originator_uid;
1621 *gidp = originator_gid;
1626 /* Otherwise see if the address specifies the uid and if so, take it and its
1629 else if (testflag(addr, af_uid_set))
1632 *igfp = testflag(addr, af_initgroups);
1635 /* Nothing has specified the uid - default to the Exim user, and group if the
1648 /* If no gid is set, it is a disaster. We default to the Exim gid only if
1649 defaulting to the Exim uid. In other words, if the configuration has specified
1650 a uid, it must also provide a gid. */
1654 common_error(TRUE, addr, ERRNO_GIDFAIL, US"User set without group for "
1655 "%s transport", tp->name);
1659 /* Check that the uid is not on the lists of banned uids that may not be used
1660 for delivery processes. */
1662 nuname = check_never_users(*uidp, never_users)
1664 : check_never_users(*uidp, fixed_never_users)
1665 ? US"fixed_never_users"
1669 common_error(TRUE, addr, ERRNO_UIDFAIL, US"User %ld set for %s transport "
1670 "is on the %s list", (long int)(*uidp), tp->name, nuname);
1682 /*************************************************
1683 * Check the size of a message for a transport *
1684 *************************************************/
1686 /* Checks that the message isn't too big for the selected transport.
1687 This is called only when it is known that the limit is set.
1691 addr the (first) address being delivered
1694 DEFER expansion failed or did not yield an integer
1695 FAIL message too big
1699 check_message_size(transport_instance *tp, address_item *addr)
1704 deliver_set_expansions(addr);
1705 size_limit = expand_string_integer(tp->message_size_limit, TRUE);
1706 deliver_set_expansions(NULL);
1708 if (expand_string_message)
1711 addr->message = size_limit == -1
1712 ? string_sprintf("failed to expand message_size_limit "
1713 "in %s transport: %s", tp->name, expand_string_message)
1714 : string_sprintf("invalid message_size_limit "
1715 "in %s transport: %s", tp->name, expand_string_message);
1717 else if (size_limit > 0 && message_size > size_limit)
1721 string_sprintf("message is too big (transport limit = %d)",
1730 /*************************************************
1731 * Transport-time check for a previous delivery *
1732 *************************************************/
1734 /* Check that this base address hasn't previously been delivered to its routed
1735 transport. If it has been delivered, mark it done. The check is necessary at
1736 delivery time in order to handle homonymic addresses correctly in cases where
1737 the pattern of redirection changes between delivery attempts (so the unique
1738 fields change). Non-homonymic previous delivery is detected earlier, at routing
1739 time (which saves unnecessary routing).
1742 addr the address item
1743 testing TRUE if testing wanted only, without side effects
1745 Returns: TRUE if previously delivered by the transport
1749 previously_transported(address_item *addr, BOOL testing)
1751 (void)string_format(big_buffer, big_buffer_size, "%s/%s",
1752 addr->unique + (testflag(addr, af_homonym)? 3:0), addr->transport->name);
1754 if (tree_search(tree_nonrecipients, big_buffer) != 0)
1756 DEBUG(D_deliver|D_route|D_transport)
1757 debug_printf("%s was previously delivered (%s transport): discarded\n",
1758 addr->address, addr->transport->name);
1759 if (!testing) child_done(addr, tod_stamp(tod_log));
1768 /******************************************************
1769 * Check for a given header in a header string *
1770 ******************************************************/
1772 /* This function is used when generating quota warnings. The configuration may
1773 specify any header lines it likes in quota_warn_message. If certain of them are
1774 missing, defaults are inserted, so we need to be able to test for the presence
1778 hdr the required header name
1779 hstring the header string
1781 Returns: TRUE the header is in the string
1782 FALSE the header is not in the string
1786 contains_header(uschar *hdr, uschar *hstring)
1788 int len = Ustrlen(hdr);
1789 uschar *p = hstring;
1792 if (strncmpic(p, hdr, len) == 0)
1795 while (*p == ' ' || *p == '\t') p++;
1796 if (*p == ':') return TRUE;
1798 while (*p != 0 && *p != '\n') p++;
1799 if (*p == '\n') p++;
1807 /*************************************************
1808 * Perform a local delivery *
1809 *************************************************/
1811 /* Each local delivery is performed in a separate process which sets its
1812 uid and gid as specified. This is a safer way than simply changing and
1813 restoring using seteuid(); there is a body of opinion that seteuid() cannot be
1814 used safely. From release 4, Exim no longer makes any use of it. Besides, not
1815 all systems have seteuid().
1817 If the uid/gid are specified in the transport_instance, they are used; the
1818 transport initialization must ensure that either both or neither are set.
1819 Otherwise, the values associated with the address are used. If neither are set,
1820 it is a configuration error.
1822 The transport or the address may specify a home directory (transport over-
1823 rides), and if they do, this is set as $home. If neither have set a working
1824 directory, this value is used for that as well. Otherwise $home is left unset
1825 and the cwd is set to "/" - a directory that should be accessible to all users.
1827 Using a separate process makes it more complicated to get error information
1828 back. We use a pipe to pass the return code and also an error code and error
1829 text string back to the parent process.
1832 addr points to an address block for this delivery; for "normal" local
1833 deliveries this is the only address to be delivered, but for
1834 pseudo-remote deliveries (e.g. by batch SMTP to a file or pipe)
1835 a number of addresses can be handled simultaneously, and in this
1836 case addr will point to a chain of addresses with the same
1839 shadowing TRUE if running a shadow transport; this causes output from pipes
1846 deliver_local(address_item *addr, BOOL shadowing)
1848 BOOL use_initgroups;
1851 int status, len, rc;
1854 uschar *working_directory;
1855 address_item *addr2;
1856 transport_instance *tp = addr->transport;
1858 /* Set up the return path from the errors or sender address. If the transport
1859 has its own return path setting, expand it and replace the existing value. */
1861 if(addr->prop.errors_address)
1862 return_path = addr->prop.errors_address;
1863 #ifdef EXPERIMENTAL_SRS
1864 else if (addr->prop.srs_sender)
1865 return_path = addr->prop.srs_sender;
1868 return_path = sender_address;
1870 if (tp->return_path)
1872 uschar *new_return_path = expand_string(tp->return_path);
1873 if (!new_return_path)
1875 if (!expand_string_forcedfail)
1877 common_error(TRUE, addr, ERRNO_EXPANDFAIL,
1878 US"Failed to expand return path \"%s\" in %s transport: %s",
1879 tp->return_path, tp->name, expand_string_message);
1883 else return_path = new_return_path;
1886 /* For local deliveries, one at a time, the value used for logging can just be
1887 set directly, once and for all. */
1889 used_return_path = return_path;
1891 /* Sort out the uid, gid, and initgroups flag. If an error occurs, the message
1892 gets put into the address(es), and the expansions are unset, so we can just
1895 if (!findugid(addr, tp, &uid, &gid, &use_initgroups)) return;
1897 /* See if either the transport or the address specifies a home directory. A
1898 home directory set in the address may already be expanded; a flag is set to
1899 indicate that. In other cases we must expand it. */
1901 if ( (deliver_home = tp->home_dir) /* Set in transport, or */
1902 || ( (deliver_home = addr->home_dir) /* Set in address and */
1903 && !testflag(addr, af_home_expanded) /* not expanded */
1906 uschar *rawhome = deliver_home;
1907 deliver_home = NULL; /* in case it contains $home */
1908 if (!(deliver_home = expand_string(rawhome)))
1910 common_error(TRUE, addr, ERRNO_EXPANDFAIL, US"home directory \"%s\" failed "
1911 "to expand for %s transport: %s", rawhome, tp->name,
1912 expand_string_message);
1915 if (*deliver_home != '/')
1917 common_error(TRUE, addr, ERRNO_NOTABSOLUTE, US"home directory path \"%s\" "
1918 "is not absolute for %s transport", deliver_home, tp->name);
1923 /* See if either the transport or the address specifies a current directory,
1924 and if so, expand it. If nothing is set, use the home directory, unless it is
1925 also unset in which case use "/", which is assumed to be a directory to which
1926 all users have access. It is necessary to be in a visible directory for some
1927 operating systems when running pipes, as some commands (e.g. "rm" under Solaris
1928 2.5) require this. */
1930 working_directory = tp->current_dir ? tp->current_dir : addr->current_dir;
1931 if (working_directory)
1933 uschar *raw = working_directory;
1934 if (!(working_directory = expand_string(raw)))
1936 common_error(TRUE, addr, ERRNO_EXPANDFAIL, US"current directory \"%s\" "
1937 "failed to expand for %s transport: %s", raw, tp->name,
1938 expand_string_message);
1941 if (*working_directory != '/')
1943 common_error(TRUE, addr, ERRNO_NOTABSOLUTE, US"current directory path "
1944 "\"%s\" is not absolute for %s transport", working_directory, tp->name);
1948 else working_directory = deliver_home ? deliver_home : US"/";
1950 /* If one of the return_output flags is set on the transport, create and open a
1951 file in the message log directory for the transport to write its output onto.
1952 This is mainly used by pipe transports. The file needs to be unique to the
1953 address. This feature is not available for shadow transports. */
1956 && ( tp->return_output || tp->return_fail_output
1957 || tp->log_output || tp->log_fail_output || tp->log_defer_output
1961 addr->return_filename =
1962 string_sprintf("%s/msglog/%s/%s-%d-%d", spool_directory, message_subdir,
1963 message_id, getpid(), return_count++);
1964 addr->return_file = open_msglog_file(addr->return_filename, 0400, &error);
1965 if (addr->return_file < 0)
1967 common_error(TRUE, addr, errno, US"Unable to %s file for %s transport "
1968 "to return message: %s", error, tp->name, strerror(errno));
1973 /* Create the pipe for inter-process communication. */
1977 common_error(TRUE, addr, ERRNO_PIPEFAIL, US"Creation of pipe failed: %s",
1982 /* Now fork the process to do the real work in the subprocess, but first
1983 ensure that all cached resources are freed so that the subprocess starts with
1984 a clean slate and doesn't interfere with the parent process. */
1988 if ((pid = fork()) == 0)
1990 BOOL replicate = TRUE;
1992 /* Prevent core dumps, as we don't want them in users' home directories.
1993 HP-UX doesn't have RLIMIT_CORE; I don't know how to do this in that
1994 system. Some experimental/developing systems (e.g. GNU/Hurd) may define
1995 RLIMIT_CORE but not support it in setrlimit(). For such systems, do not
1996 complain if the error is "not supported".
1998 There are two scenarios where changing the max limit has an effect. In one,
1999 the user is using a .forward and invoking a command of their choice via pipe;
2000 for these, we do need the max limit to be 0 unless the admin chooses to
2001 permit an increased limit. In the other, the command is invoked directly by
2002 the transport and is under administrator control, thus being able to raise
2003 the limit aids in debugging. So there's no general always-right answer.
2005 Thus we inhibit core-dumps completely but let individual transports, while
2006 still root, re-raise the limits back up to aid debugging. We make the
2007 default be no core-dumps -- few enough people can use core dumps in
2008 diagnosis that it's reasonable to make them something that has to be explicitly requested.
2015 if (setrlimit(RLIMIT_CORE, &rl) < 0)
2017 # ifdef SETRLIMIT_NOT_SUPPORTED
2018 if (errno != ENOSYS && errno != ENOTSUP)
2020 log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_CORE) failed: %s",
2025 /* Reset the random number generator, so different processes don't all
2026 have the same sequence. */
2030 /* If the transport has a setup entry, call this first, while still
2031 privileged. (Appendfile uses this to expand quota, for example, while
2032 able to read private files.) */
2034 if (addr->transport->setup)
2035 switch((addr->transport->setup)(addr->transport, addr, NULL, uid, gid,
2039 addr->transport_return = DEFER;
2043 addr->transport_return = PANIC;
2047 /* Ignore SIGINT and SIGTERM during delivery. Also ignore SIGUSR1, as
2048 when the process becomes unprivileged, it won't be able to write to the
2049 process log. SIGHUP is ignored throughout exim, except when it is being
2052 signal(SIGINT, SIG_IGN);
2053 signal(SIGTERM, SIG_IGN);
2054 signal(SIGUSR1, SIG_IGN);
2056 /* Close the unwanted half of the pipe, and set close-on-exec for the other
2057 half - for transports that exec things (e.g. pipe). Then set the required
2060 (void)close(pfd[pipe_read]);
2061 (void)fcntl(pfd[pipe_write], F_SETFD, fcntl(pfd[pipe_write], F_GETFD) |
2063 exim_setugid(uid, gid, use_initgroups,
2064 string_sprintf("local delivery to %s <%s> transport=%s", addr->local_part,
2065 addr->address, addr->transport->name));
2069 address_item *batched;
2070 debug_printf(" home=%s current=%s\n", deliver_home, working_directory);
2071 for (batched = addr->next; batched; batched = batched->next)
2072 debug_printf("additional batched address: %s\n", batched->address);
2075 /* Set an appropriate working directory. */
2077 if (Uchdir(working_directory) < 0)
2079 addr->transport_return = DEFER;
2080 addr->basic_errno = errno;
2081 addr->message = string_sprintf("failed to chdir to %s", working_directory);
2084 /* If successful, call the transport */
2089 set_process_info("delivering %s to %s using %s", message_id,
2090 addr->local_part, addr->transport->name);
2092 /* Setting this global in the subprocess means we need never clear it */
2093 transport_name = addr->transport->name;
2095 /* If a transport filter has been specified, set up its argument list.
2096 Any errors will get put into the address, and FALSE yielded. */
2098 if (addr->transport->filter_command)
2100 ok = transport_set_up_command(&transport_filter_argv,
2101 addr->transport->filter_command,
2102 TRUE, PANIC, addr, US"transport filter", NULL);
2103 transport_filter_timeout = addr->transport->filter_timeout;
2105 else transport_filter_argv = NULL;
2109 debug_print_string(addr->transport->debug_string);
2110 replicate = !(addr->transport->info->code)(addr->transport, addr);
2114 /* Pass the results back down the pipe. If necessary, first replicate the
2115 status in the top address to the others in the batch. The label is the
2116 subject of a goto when a call to the transport's setup function fails. We
2117 pass the pointer to the transport back in case it got changed as a result of
2118 file_format in appendfile. */
2122 if (replicate) replicate_status(addr);
2123 for (addr2 = addr; addr2; addr2 = addr2->next)
2126 int local_part_length = Ustrlen(addr2->local_part);
2130 if( (ret = write(pfd[pipe_write], &addr2->transport_return, sizeof(int))) != sizeof(int)
2131 || (ret = write(pfd[pipe_write], &transport_count, sizeof(transport_count))) != sizeof(transport_count)
2132 || (ret = write(pfd[pipe_write], &addr2->flags, sizeof(addr2->flags))) != sizeof(addr2->flags)
2133 || (ret = write(pfd[pipe_write], &addr2->basic_errno, sizeof(int))) != sizeof(int)
2134 || (ret = write(pfd[pipe_write], &addr2->more_errno, sizeof(int))) != sizeof(int)
2135 || (ret = write(pfd[pipe_write], &addr2->special_action, sizeof(int))) != sizeof(int)
2136 || (ret = write(pfd[pipe_write], &addr2->transport,
2137 sizeof(transport_instance *))) != sizeof(transport_instance *)
2139 /* For a file delivery, pass back the local part, in case the original
2140 was only part of the final delivery path. This gives more complete
2143 || (testflag(addr2, af_file)
2144 && ( (ret = write(pfd[pipe_write], &local_part_length, sizeof(int))) != sizeof(int)
2145 || (ret = write(pfd[pipe_write], addr2->local_part, local_part_length)) != local_part_length
2149 log_write(0, LOG_MAIN|LOG_PANIC, "Failed writing transport results to pipe: %s\n",
2150 ret == -1 ? strerror(errno) : "short write");
2152 /* Now any messages */
2154 for (i = 0, s = addr2->message; i < 2; i++, s = addr2->user_message)
2156 int message_length = s ? Ustrlen(s) + 1 : 0;
2157 if( (ret = write(pfd[pipe_write], &message_length, sizeof(int))) != sizeof(int)
2158 || message_length > 0 && (ret = write(pfd[pipe_write], s, message_length)) != message_length
2160 log_write(0, LOG_MAIN|LOG_PANIC, "Failed writing transport results to pipe: %s\n",
2161 ret == -1 ? strerror(errno) : "short write");
2165 /* OK, this process is now done. Free any cached resources that it opened,
2166 and close the pipe we were writing down before exiting. */
2168 (void)close(pfd[pipe_write]);
2173 /* Back in the main process: panic if the fork did not succeed. This seems
2174 better than returning an error - if forking is failing it is probably best
2175 not to try other deliveries for this message. */
2178 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Fork failed for local delivery to %s",
2181 /* Read the pipe to get the delivery status codes and error messages. Our copy
2182 of the writing end must be closed first, as otherwise read() won't return zero
2183 on an empty pipe. We check that a status exists for each address before
2184 overwriting the address structure. If data is missing, the default DEFER status
2185 will remain. Afterwards, close the reading end. */
2187 (void)close(pfd[pipe_write]);
2189 for (addr2 = addr; addr2; addr2 = addr2->next)
2191 len = read(pfd[pipe_read], &status, sizeof(int));
2197 addr2->transport_return = status;
2198 len = read(pfd[pipe_read], &transport_count,
2199 sizeof(transport_count));
2200 len = read(pfd[pipe_read], &addr2->flags, sizeof(addr2->flags));
2201 len = read(pfd[pipe_read], &addr2->basic_errno, sizeof(int));
2202 len = read(pfd[pipe_read], &addr2->more_errno, sizeof(int));
2203 len = read(pfd[pipe_read], &addr2->special_action, sizeof(int));
2204 len = read(pfd[pipe_read], &addr2->transport,
2205 sizeof(transport_instance *));
2207 if (testflag(addr2, af_file))
2209 int local_part_length;
2210 len = read(pfd[pipe_read], &local_part_length, sizeof(int));
2211 len = read(pfd[pipe_read], big_buffer, local_part_length);
2212 big_buffer[local_part_length] = 0;
2213 addr2->local_part = string_copy(big_buffer);
2216 for (i = 0, sptr = &addr2->message; i < 2; i++, sptr = &addr2->user_message)
2219 len = read(pfd[pipe_read], &message_length, sizeof(int));
2220 if (message_length > 0)
2222 len = read(pfd[pipe_read], big_buffer, message_length);
2223 big_buffer[big_buffer_size-1] = '\0'; /* guard byte */
2224 if (len > 0) *sptr = string_copy(big_buffer);
2231 log_write(0, LOG_MAIN|LOG_PANIC, "failed to read delivery status for %s "
2232 "from delivery subprocess", addr2->unique);
2237 (void)close(pfd[pipe_read]);
2239 /* Unless shadowing, write all successful addresses immediately to the journal
2240 file, to ensure they are recorded asap. For homonymic addresses, use the base
2241 address plus the transport name. Failure to write the journal is panic-worthy,
2242 but don't stop, as it may prove possible subsequently to update the spool file
2243 in order to record the delivery. */
2247 for (addr2 = addr; addr2; addr2 = addr2->next)
2248 if (addr2->transport_return == OK)
2250 if (testflag(addr2, af_homonym))
2251 sprintf(CS big_buffer, "%.500s/%s\n", addr2->unique + 3, tp->name);
2253 sprintf(CS big_buffer, "%.500s\n", addr2->unique);
2255 /* In the test harness, wait just a bit to let the subprocess finish off
2256 any debug output etc first. */
2258 if (running_in_test_harness) millisleep(300);
2260 DEBUG(D_deliver) debug_printf("journalling %s", big_buffer);
2261 len = Ustrlen(big_buffer);
2262 if (write(journal_fd, big_buffer, len) != len)
2263 log_write(0, LOG_MAIN|LOG_PANIC, "failed to update journal for %s: %s",
2264 big_buffer, strerror(errno));
2267 /* Ensure the journal file is pushed out to disk. */
2269 if (EXIMfsync(journal_fd) < 0)
2270 log_write(0, LOG_MAIN|LOG_PANIC, "failed to fsync journal: %s",
2274 /* Wait for the process to finish. If it terminates with a non-zero code,
2275 freeze the message (except for SIGTERM, SIGKILL and SIGQUIT), but leave the
2276 status values of all the addresses as they are. Take care to handle the case
2277 when the subprocess doesn't seem to exist. This has been seen on one system
2278 when Exim was called from an MUA that set SIGCHLD to SIG_IGN. When that
2279 happens, wait() doesn't recognize the termination of child processes. Exim now
2280 resets SIGCHLD to SIG_DFL, but this code should still be robust. */
2282 while ((rc = wait(&status)) != pid)
2283 if (rc < 0 && errno == ECHILD) /* Process has vanished */
2285 log_write(0, LOG_MAIN, "%s transport process vanished unexpectedly",
2286 addr->transport->driver_name);
2291 if ((status & 0xffff) != 0)
2293 int msb = (status >> 8) & 255;
2294 int lsb = status & 255;
2295 int code = (msb == 0)? (lsb & 0x7f) : msb;
2296 if (msb != 0 || (code != SIGTERM && code != SIGKILL && code != SIGQUIT))
2297 addr->special_action = SPECIAL_FREEZE;
2298 log_write(0, LOG_MAIN|LOG_PANIC, "%s transport process returned non-zero "
2299 "status 0x%04x: %s %d",
2300 addr->transport->driver_name,
2302 msb == 0 ? "terminated by signal" : "exit code",
2306 /* If SPECIAL_WARN is set in the top address, send a warning message. */
2308 if (addr->special_action == SPECIAL_WARN && addr->transport->warn_message)
2311 uschar *warn_message;
2314 DEBUG(D_deliver) debug_printf("Warning message requested by transport\n");
2316 if (!(warn_message = expand_string(addr->transport->warn_message)))
2317 log_write(0, LOG_MAIN|LOG_PANIC, "Failed to expand \"%s\" (warning "
2318 "message for %s transport): %s", addr->transport->warn_message,
2319 addr->transport->name, expand_string_message);
2321 else if ((pid = child_open_exim(&fd)) > 0)
2323 FILE *f = fdopen(fd, "wb");
2324 if (errors_reply_to && !contains_header(US"Reply-To", warn_message))
2325 fprintf(f, "Reply-To: %s\n", errors_reply_to);
2326 fprintf(f, "Auto-Submitted: auto-replied\n");
2327 if (!contains_header(US"From", warn_message))
2329 fprintf(f, "%s", CS warn_message);
2331 /* Close and wait for child process to complete, without a timeout. */
2334 (void)child_close(pid, 0);
2337 addr->special_action = SPECIAL_NONE;
2344 /* Check transport for the given concurrency limit. Return TRUE if over
2345 the limit (or an expansion failure), else FALSE and if there was a limit,
2346 the key for the hints database used for the concurrency count. */
2349 tpt_parallel_check(transport_instance * tp, address_item * addr, uschar ** key)
2351 unsigned max_parallel;
2353 if (!tp->max_parallel) return FALSE;
2355 max_parallel = (unsigned) expand_string_integer(tp->max_parallel, TRUE);
2356 if (expand_string_message)
2358 log_write(0, LOG_MAIN|LOG_PANIC, "Failed to expand max_parallel option "
2359 "in %s transport (%s): %s", tp->name, addr->address,
2360 expand_string_message);
2364 if (max_parallel > 0)
2366 uschar * serialize_key = string_sprintf("tpt-serialize-%s", tp->name);
2367 if (!enq_start(serialize_key, max_parallel))
2369 address_item * next;
2371 debug_printf("skipping tpt %s because concurrency limit %u reached\n",
2372 tp->name, max_parallel);
2376 addr->message = US"concurrency limit reached for transport";
2377 addr->basic_errno = ERRNO_TRETRY;
2378 post_process_one(addr, DEFER, LOG_MAIN, DTYPE_TRANSPORT, 0);
2379 } while ((addr = next));
2382 *key = serialize_key;
2389 /*************************************************
2390 * Do local deliveries *
2391 *************************************************/
2393 /* This function processes the list of addresses in addr_local. True local
2394 deliveries are always done one address at a time. However, local deliveries can
2395 be batched up in some cases. Typically this is when writing batched SMTP output
2396 files for use by some external transport mechanism, or when running local
2397 deliveries over LMTP.
2404 do_local_deliveries(void)
2407 open_db *dbm_file = NULL;
2408 time_t now = time(NULL);
2410 /* Loop until we have exhausted the supply of local deliveries */
2414 time_t delivery_start;
2416 address_item *addr2, *addr3, *nextaddr;
2417 int logflags = LOG_MAIN;
2418 int logchar = dont_deliver? '*' : '=';
2419 transport_instance *tp;
2420 uschar * serialize_key = NULL;
2422 /* Pick the first undelivered address off the chain */
2424 address_item *addr = addr_local;
2425 addr_local = addr->next;
2428 DEBUG(D_deliver|D_transport)
2429 debug_printf("--------> %s <--------\n", addr->address);
2431 /* An internal disaster if there is no transport. Should not occur! */
2433 if (!(tp = addr->transport))
2435 logflags |= LOG_PANIC;
2436 disable_logging = FALSE; /* Jic */
2437 addr->message = addr->router
2438 ? string_sprintf("No transport set by %s router", addr->router->name)
2439 : string_sprintf("No transport set by system filter");
2440 post_process_one(addr, DEFER, logflags, DTYPE_TRANSPORT, 0);
2444 /* Check that this base address hasn't previously been delivered to this
2445 transport. The check is necessary at this point to handle homonymic addresses
2446 correctly in cases where the pattern of redirection changes between delivery
2447 attempts. Non-homonymic previous delivery is detected earlier, at routing
2450 if (previously_transported(addr, FALSE)) continue;
2452 /* There are weird cases where logging is disabled */
2454 disable_logging = tp->disable_logging;
2456 /* Check for batched addresses and possible amalgamation. Skip all the work
2457 if either batch_max <= 1 or there aren't any other addresses for local
2460 if (tp->batch_max > 1 && addr_local)
2462 int batch_count = 1;
2463 BOOL uses_dom = readconf_depends((driver_instance *)tp, US"domain");
2464 BOOL uses_lp = ( testflag(addr, af_pfr)
2465 && (testflag(addr, af_file) || addr->local_part[0] == '|')
2467 || readconf_depends((driver_instance *)tp, US"local_part");
2468 uschar *batch_id = NULL;
2469 address_item **anchor = &addr_local;
2470 address_item *last = addr;
2473 /* Expand the batch_id string for comparison with other addresses.
2474 Expansion failure suppresses batching. */
2478 deliver_set_expansions(addr);
2479 batch_id = expand_string(tp->batch_id);
2480 deliver_set_expansions(NULL);
2483 log_write(0, LOG_MAIN|LOG_PANIC, "Failed to expand batch_id option "
2484 "in %s transport (%s): %s", tp->name, addr->address,
2485 expand_string_message);
2486 batch_count = tp->batch_max;
2490 /* Until we reach the batch_max limit, pick off addresses which have the
2491 same characteristics. These are:
2494 not previously delivered (see comment about 50 lines above)
2495 same local part if the transport's configuration contains $local_part
2496 or if this is a file or pipe delivery from a redirection
2497 same domain if the transport's configuration contains $domain
2499 same additional headers
2500 same headers to be removed
2501 same uid/gid for running the transport
2502 same first host if a host list is set
2505 while ((next = *anchor) && batch_count < tp->batch_max)
2508 tp == next->transport
2509 && !previously_transported(next, TRUE)
2510 && (addr->flags & (af_pfr|af_file)) == (next->flags & (af_pfr|af_file))
2511 && (!uses_lp || Ustrcmp(next->local_part, addr->local_part) == 0)
2512 && (!uses_dom || Ustrcmp(next->domain, addr->domain) == 0)
2513 && same_strings(next->prop.errors_address, addr->prop.errors_address)
2514 && same_headers(next->prop.extra_headers, addr->prop.extra_headers)
2515 && same_strings(next->prop.remove_headers, addr->prop.remove_headers)
2516 && same_ugid(tp, addr, next)
2517 && ( !addr->host_list && !next->host_list
2520 && Ustrcmp(addr->host_list->name, next->host_list->name) == 0
2523 /* If the transport has a batch_id setting, batch_id will be non-NULL
2524 from the expansion outside the loop. Expand for this address and compare.
2525 Expansion failure makes this address ineligible for batching. */
2530 address_item *save_nextnext = next->next;
2531 next->next = NULL; /* Expansion for a single address */
2532 deliver_set_expansions(next);
2533 next->next = save_nextnext;
2534 bid = expand_string(tp->batch_id);
2535 deliver_set_expansions(NULL);
2538 log_write(0, LOG_MAIN|LOG_PANIC, "Failed to expand batch_id option "
2539 "in %s transport (%s): %s", tp->name, next->address,
2540 expand_string_message);
2543 else ok = (Ustrcmp(batch_id, bid) == 0);
2546 /* Take address into batch if OK. */
2550 *anchor = next->next; /* Include the address */
2556 else anchor = &next->next; /* Skip the address */
2560 /* We now have one or more addresses that can be delivered in a batch. Check
2561 whether the transport is prepared to accept a message of this size. If not,
2562 fail them all forthwith. If the expansion fails, or does not yield an
2563 integer, defer delivery. */
2565 if (tp->message_size_limit)
2567 int rc = check_message_size(tp, addr);
2570 replicate_status(addr);
2574 post_process_one(addr, rc, logflags, DTYPE_TRANSPORT, 0);
2577 continue; /* With next batch of addresses */
2581 /* If we are not running the queue, or if forcing, all deliveries will be
2582 attempted. Otherwise, we must respect the retry times for each address. Even
2583 when not doing this, we need to set up the retry key string, and determine
2584 whether a retry record exists, because after a successful delivery, a delete
2585 retry item must be set up. Keep the retry database open only for the duration
2586 of these checks, rather than for all local deliveries, because some local
2587 deliveries (e.g. to pipes) can take a substantial time. */
2589 if (!(dbm_file = dbfn_open(US"retry", O_RDONLY, &dbblock, FALSE)))
2591 DEBUG(D_deliver|D_retry|D_hints_lookup)
2592 debug_printf("no retry data available\n");
2599 BOOL ok = TRUE; /* to deliver this address */
2602 /* Set up the retry key to include the domain or not, and change its
2603 leading character from "R" to "T". Must make a copy before doing this,
2604 because the old key may be pointed to from a "delete" retry item after
2607 retry_key = string_copy(
2608 tp->retry_use_local_part ? addr2->address_retry_key :
2609 addr2->domain_retry_key);
2612 /* Inspect the retry data. If there is no hints file, delivery happens. */
2616 dbdata_retry *retry_record = dbfn_read(dbm_file, retry_key);
2618 /* If there is no retry record, delivery happens. If there is,
2619 remember it exists so it can be deleted after a successful delivery. */
2623 setflag(addr2, af_lt_retry_exists);
2625 /* A retry record exists for this address. If queue running and not
2626 forcing, inspect its contents. If the record is too old, or if its
2627 retry time has come, or if it has passed its cutoff time, delivery
2632 debug_printf("retry record exists: age=%s ",
2633 readconf_printtime(now - retry_record->time_stamp));
2634 debug_printf("(max %s)\n", readconf_printtime(retry_data_expire));
2635 debug_printf(" time to retry = %s expired = %d\n",
2636 readconf_printtime(retry_record->next_try - now),
2637 retry_record->expired);
2640 if (queue_running && !deliver_force)
2642 ok = (now - retry_record->time_stamp > retry_data_expire)
2643 || (now >= retry_record->next_try)
2644 || retry_record->expired;
2646 /* If we haven't reached the retry time, there is one more check
2647 to do, which is for the ultimate address timeout. */
2650 ok = retry_ultimate_address_timeout(retry_key, addr2->domain,
2654 else DEBUG(D_retry) debug_printf("no retry record exists\n");
2657 /* This address is to be delivered. Leave it on the chain. */
2662 addr2 = addr2->next;
2665 /* This address is to be deferred. Take it out of the chain, and
2666 post-process it as complete. Must take it out of the chain first,
2667 because post processing puts it on another chain. */
2671 address_item *this = addr2;
2672 this->message = US"Retry time not yet reached";
2673 this->basic_errno = ERRNO_LRETRY;
2674 addr2 = addr3 ? (addr3->next = addr2->next)
2675 : (addr = addr2->next);
2676 post_process_one(this, DEFER, logflags, DTYPE_TRANSPORT, 0);
2680 if (dbm_file) dbfn_close(dbm_file);
2682 /* If there are no addresses left on the chain, they all deferred. Loop
2683 for the next set of addresses. */
2685 if (!addr) continue;
2687 /* If the transport is limited for parallellism, enforce that here.
2688 We use a hints DB entry, incremented here and decremented after
2689 the transport (and any shadow transport) completes. */
2691 if (tpt_parallel_check(tp, addr, &serialize_key))
2693 if (expand_string_message)
2695 logflags |= LOG_PANIC;
2699 post_process_one(addr, DEFER, logflags, DTYPE_TRANSPORT, 0);
2700 } while ((addr = addr2));
2702 continue; /* Loop for the next set of addresses. */
2706 /* So, finally, we do have some addresses that can be passed to the
2707 transport. Before doing so, set up variables that are relevant to a
2710 deliver_set_expansions(addr);
2711 delivery_start = time(NULL);
2712 deliver_local(addr, FALSE);
2713 deliver_time = (int)(time(NULL) - delivery_start);
2715 /* If a shadow transport (which must perforce be another local transport), is
2716 defined, and its condition is met, we must pass the message to the shadow
2717 too, but only those addresses that succeeded. We do this by making a new
2718 chain of addresses - also to keep the original chain uncontaminated. We must
2719 use a chain rather than doing it one by one, because the shadow transport may
2722 NOTE: if the condition fails because of a lookup defer, there is nothing we
2726 && ( !tp->shadow_condition
2727 || expand_check_condition(tp->shadow_condition, tp->name, US"transport")
2730 transport_instance *stp;
2731 address_item *shadow_addr = NULL;
2732 address_item **last = &shadow_addr;
2734 for (stp = transports; stp; stp = stp->next)
2735 if (Ustrcmp(stp->name, tp->shadow) == 0) break;
2738 log_write(0, LOG_MAIN|LOG_PANIC, "shadow transport \"%s\" not found ",
2741 /* Pick off the addresses that have succeeded, and make clones. Put into
2742 the shadow_message field a pointer to the shadow_message field of the real
2745 else for (addr2 = addr; addr2; addr2 = addr2->next)
2746 if (addr2->transport_return == OK)
2748 addr3 = store_get(sizeof(address_item));
2751 addr3->shadow_message = (uschar *) &(addr2->shadow_message);
2752 addr3->transport = stp;
2753 addr3->transport_return = DEFER;
2754 addr3->return_filename = NULL;
2755 addr3->return_file = -1;
2757 last = &(addr3->next);
2760 /* If we found any addresses to shadow, run the delivery, and stick any
2761 message back into the shadow_message field in the original. */
2765 int save_count = transport_count;
2767 DEBUG(D_deliver|D_transport)
2768 debug_printf(">>>>>>>>>>>>>>>> Shadow delivery >>>>>>>>>>>>>>>>\n");
2769 deliver_local(shadow_addr, TRUE);
2771 for(; shadow_addr; shadow_addr = shadow_addr->next)
2773 int sresult = shadow_addr->transport_return;
2774 *(uschar **)shadow_addr->shadow_message =
2776 ? string_sprintf(" ST=%s", stp->name)
2777 : string_sprintf(" ST=%s (%s%s%s)", stp->name,
2778 shadow_addr->basic_errno <= 0
2780 : US strerror(shadow_addr->basic_errno),
2781 shadow_addr->basic_errno <= 0 || !shadow_addr->message
2784 shadow_addr->message
2785 ? shadow_addr->message
2786 : shadow_addr->basic_errno <= 0
2790 DEBUG(D_deliver|D_transport)
2791 debug_printf("%s shadow transport returned %s for %s\n",
2793 sresult == OK ? "OK" :
2794 sresult == DEFER ? "DEFER" :
2795 sresult == FAIL ? "FAIL" :
2796 sresult == PANIC ? "PANIC" : "?",
2797 shadow_addr->address);
2800 DEBUG(D_deliver|D_transport)
2801 debug_printf(">>>>>>>>>>>>>>>> End shadow delivery >>>>>>>>>>>>>>>>\n");
2803 transport_count = save_count; /* Restore original transport count */
2807 /* Cancel the expansions that were set up for the delivery. */
2809 deliver_set_expansions(NULL);
2811 /* If the transport was parallelism-limited, decrement the hints DB record. */
2813 if (serialize_key) enq_end(serialize_key);
2815 /* Now we can process the results of the real transport. We must take each
2816 address off the chain first, because post_process_one() puts it on another
2819 for (addr2 = addr; addr2; addr2 = nextaddr)
2821 int result = addr2->transport_return;
2822 nextaddr = addr2->next;
2824 DEBUG(D_deliver|D_transport)
2825 debug_printf("%s transport returned %s for %s\n",
2827 result == OK ? "OK" :
2828 result == DEFER ? "DEFER" :
2829 result == FAIL ? "FAIL" :
2830 result == PANIC ? "PANIC" : "?",
2833 /* If there is a retry_record, or if delivery is deferred, build a retry
2834 item for setting a new retry time or deleting the old retry record from
2835 the database. These items are handled all together after all addresses
2836 have been handled (so the database is open just for a short time for
2839 if (result == DEFER || testflag(addr2, af_lt_retry_exists))
2841 int flags = result == DEFER ? 0 : rf_delete;
2842 uschar *retry_key = string_copy(tp->retry_use_local_part
2843 ? addr2->address_retry_key : addr2->domain_retry_key);
2845 retry_add_item(addr2, retry_key, flags);
2848 /* Done with this address */
2850 if (result == OK) addr2->more_errno = deliver_time;
2851 post_process_one(addr2, result, logflags, DTYPE_TRANSPORT, logchar);
2853 /* If a pipe delivery generated text to be sent back, the result may be
2854 changed to FAIL, and we must copy this for subsequent addresses in the
2857 if (addr2->transport_return != result)
2859 for (addr3 = nextaddr; addr3; addr3 = addr3->next)
2861 addr3->transport_return = addr2->transport_return;
2862 addr3->basic_errno = addr2->basic_errno;
2863 addr3->message = addr2->message;
2865 result = addr2->transport_return;
2868 /* Whether or not the result was changed to FAIL, we need to copy the
2869 return_file value from the first address into all the addresses of the
2870 batch, so they are all listed in the error message. */
2872 addr2->return_file = addr->return_file;
2874 /* Change log character for recording successful deliveries. */
2876 if (result == OK) logchar = '-';
2878 } /* Loop back for next batch of addresses */
2884 /*************************************************
2885 * Sort remote deliveries *
2886 *************************************************/
2888 /* This function is called if remote_sort_domains is set. It arranges that the
2889 chain of addresses for remote deliveries is ordered according to the strings
2890 specified. Try to make this shuffling reasonably efficient by handling
2891 sequences of addresses rather than just single ones.
2898 sort_remote_deliveries(void)
2901 address_item **aptr = &addr_remote;
2902 const uschar *listptr = remote_sort_domains;
2907 && (pattern = string_nextinlist(&listptr, &sep, patbuf, sizeof(patbuf)))
2910 address_item *moved = NULL;
2911 address_item **bptr = &moved;
2915 address_item **next;
2916 deliver_domain = (*aptr)->domain; /* set $domain */
2917 if (match_isinlist(deliver_domain, (const uschar **)&pattern, UCHAR_MAX+1,
2918 &domainlist_anchor, NULL, MCL_DOMAIN, TRUE, NULL) == OK)
2920 aptr = &(*aptr)->next;
2924 next = &(*aptr)->next;
2926 && (deliver_domain = (*next)->domain, /* Set $domain */
2927 match_isinlist(deliver_domain, (const uschar **)&pattern, UCHAR_MAX+1,
2928 &domainlist_anchor, NULL, MCL_DOMAIN, TRUE, NULL)) != OK
2930 next = &(*next)->next;
2932 /* If the batch of non-matchers is at the end, add on any that were
2933 extracted further up the chain, and end this iteration. Otherwise,
2934 extract them from the chain and hang on the moved chain. */
2946 aptr = &(*aptr)->next;
2949 /* If the loop ended because the final address matched, *aptr will
2950 be NULL. Add on to the end any extracted non-matching addresses. If
2951 *aptr is not NULL, the loop ended via "break" when *next is null, that
2952 is, there was a string of non-matching addresses at the end. In this
2953 case the extracted addresses have already been added on the end. */
2955 if (!*aptr) *aptr = moved;
2961 debug_printf("remote addresses after sorting:\n");
2962 for (addr = addr_remote; addr; addr = addr->next)
2963 debug_printf(" %s\n", addr->address);
2969 /*************************************************
2970 * Read from pipe for remote delivery subprocess *
2971 *************************************************/
2973 /* This function is called when the subprocess is complete, but can also be
2974 called before it is complete, in order to empty a pipe that is full (to prevent
2975 deadlock). It must therefore keep track of its progress in the parlist data
2978 We read the pipe to get the delivery status codes and a possible error message
2979 for each address, optionally preceded by unusability data for the hosts and
2980 also by optional retry data.
2982 Read in large chunks into the big buffer and then scan through, interpreting
2983 the data therein. In most cases, only a single read will be necessary. No
2984 individual item will ever be anywhere near 2500 bytes in length, so by ensuring
2985 that we read the next chunk when there is less than 2500 bytes left in the
2986 non-final chunk, we can assume each item is complete in the buffer before
2987 handling it. Each item is written using a single write(), which is atomic for
2988 small items (less than PIPE_BUF, which seems to be at least 512 in any Unix and
2989 often bigger) so even if we are reading while the subprocess is still going, we
2990 should never have only a partial item in the buffer.
2993 poffset the offset of the parlist item
2994 eop TRUE if the process has completed
2996 Returns: TRUE if the terminating 'Z' item has been read,
2997 or there has been a disaster (i.e. no more data needed);
3002 par_read_pipe(int poffset, BOOL eop)
3005 pardata *p = parlist + poffset;
3006 address_item *addrlist = p->addrlist;
3007 address_item *addr = p->addr;
3010 uschar *endptr = big_buffer;
3011 uschar *ptr = endptr;
3012 uschar *msg = p->msg;
3013 BOOL done = p->done;
3014 BOOL unfinished = TRUE;
3015 /* minimum size to read is header size including id, subid and length */
3016 int required = PIPE_HEADER_SIZE;
3018 /* Loop through all items, reading from the pipe when necessary. The pipe
3019 is set up to be non-blocking, but there are two different Unix mechanisms in
3020 use. Exim uses O_NONBLOCK if it is defined. This returns 0 for end of file,
3021 and EAGAIN for no more data. If O_NONBLOCK is not defined, Exim uses O_NDELAY,
3022 which returns 0 for both end of file and no more data. We distinguish the
3023 two cases by taking 0 as end of file only when we know the process has
3026 Each separate item is written to the pipe in a single write(), and as they are
3027 all short items, the writes will all be atomic and we should never find
3028 ourselves in the position of having read an incomplete item. "Short" in this
3029 case can mean up to about 1K in the case when there is a long error message
3030 associated with an address. */
3032 DEBUG(D_deliver) debug_printf("reading pipe for subprocess %d (%s)\n",
3033 (int)p->pid, eop? "ended" : "not ended");
3037 retry_item *r, **rp;
3038 int remaining = endptr - ptr;
3039 uschar header[PIPE_HEADER_SIZE + 1];
3043 /* Read (first time) or top up the chars in the buffer if necessary.
3044 There will be only one read if we get all the available data (i.e. don't
3045 fill the buffer completely). */
3047 if (remaining < required && unfinished)
3050 int available = big_buffer_size - remaining;
3052 if (remaining > 0) memmove(big_buffer, ptr, remaining);
3055 endptr = big_buffer + remaining;
3056 len = read(fd, endptr, available);
3058 DEBUG(D_deliver) debug_printf("read() yielded %d\n", len);
3060 /* If the result is EAGAIN and the process is not complete, just
3061 stop reading any more and process what we have already. */
3065 if (!eop && errno == EAGAIN) len = 0; else
3067 msg = string_sprintf("failed to read pipe from transport process "
3068 "%d for transport %s: %s", pid, addr->transport->driver_name,
3074 /* If the length is zero (eof or no-more-data), just process what we
3075 already have. Note that if the process is still running and we have
3076 read all the data in the pipe (but less that "available") then we
3077 won't read any more, as "unfinished" will get set FALSE. */
3081 unfinished = len == available;
3084 /* If we are at the end of the available data, exit the loop. */
3085 if (ptr >= endptr) break;
3087 /* copy and read header */
3088 memcpy(header, ptr, PIPE_HEADER_SIZE);
3089 header[PIPE_HEADER_SIZE] = '\0';
3092 required = Ustrtol(header + 2, &endc, 10) + PIPE_HEADER_SIZE; /* header + data */
3095 msg = string_sprintf("failed to read pipe from transport process "
3096 "%d for transport %s: error reading size from header", pid, addr->transport->driver_name);
3102 debug_printf("header read id:%c,subid:%c,size:%s,required:%d,remaining:%d,unfinished:%d\n",
3103 id, subid, header+2, required, remaining, unfinished);
3105 /* is there room for the dataset we want to read ? */
3106 if (required > big_buffer_size - PIPE_HEADER_SIZE)
3108 msg = string_sprintf("failed to read pipe from transport process "
3109 "%d for transport %s: big_buffer too small! required size=%d buffer size=%d", pid, addr->transport->driver_name,
3110 required, big_buffer_size - PIPE_HEADER_SIZE);
3115 /* we wrote all datasets with atomic write() calls
3116 remaining < required only happens if big_buffer was too small
3117 to get all available data from pipe. unfinished has to be true
3119 if (remaining < required)
3123 msg = string_sprintf("failed to read pipe from transport process "
3124 "%d for transport %s: required size=%d > remaining size=%d and unfinished=false",
3125 pid, addr->transport->driver_name, required, remaining);
3130 /* step behind the header */
3131 ptr += PIPE_HEADER_SIZE;
3133 /* Handle each possible type of item, assuming the complete item is
3134 available in store. */
3138 /* Host items exist only if any hosts were marked unusable. Match
3139 up by checking the IP address. */
3142 for (h = addrlist->host_list; h; h = h->next)
3144 if (!h->address || Ustrcmp(h->address, ptr+2) != 0) continue;
3152 /* Retry items are sent in a preceding R item for each address. This is
3153 kept separate to keep each message short enough to guarantee it won't
3154 be split in the pipe. Hopefully, in the majority of cases, there won't in
3155 fact be any retry items at all.
3157 The complete set of retry items might include an item to delete a
3158 routing retry if there was a previous routing delay. However, routing
3159 retries are also used when a remote transport identifies an address error.
3160 In that case, there may also be an "add" item for the same key. Arrange
3161 that a "delete" item is dropped in favour of an "add" item. */
3164 if (!addr) goto ADDR_MISMATCH;
3166 DEBUG(D_deliver|D_retry)
3167 debug_printf("reading retry information for %s from subprocess\n",
3170 /* Cut out any "delete" items on the list. */
3172 for (rp = &(addr->retries); (r = *rp); rp = &r->next)
3173 if (Ustrcmp(r->key, ptr+1) == 0) /* Found item with same key */
3175 if ((r->flags & rf_delete) == 0) break; /* It was not "delete" */
3176 *rp = r->next; /* Excise a delete item */
3177 DEBUG(D_deliver|D_retry)
3178 debug_printf(" existing delete item dropped\n");
3181 /* We want to add a delete item only if there is no non-delete item;
3182 however we still have to step ptr through the data. */
3184 if (!r || (*ptr & rf_delete) == 0)
3186 r = store_get(sizeof(retry_item));
3187 r->next = addr->retries;
3190 r->key = string_copy(ptr);
3192 memcpy(&(r->basic_errno), ptr, sizeof(r->basic_errno));
3193 ptr += sizeof(r->basic_errno);
3194 memcpy(&(r->more_errno), ptr, sizeof(r->more_errno));
3195 ptr += sizeof(r->more_errno);
3196 r->message = (*ptr)? string_copy(ptr) : NULL;
3197 DEBUG(D_deliver|D_retry)
3198 debug_printf(" added %s item\n",
3199 ((r->flags & rf_delete) == 0)? "retry" : "delete");
3204 DEBUG(D_deliver|D_retry)
3205 debug_printf(" delete item not added: non-delete item exists\n");
3208 ptr += sizeof(r->basic_errno) + sizeof(r->more_errno);
3214 /* Put the amount of data written into the parlist block */
3217 memcpy(&(p->transport_count), ptr, sizeof(transport_count));
3218 ptr += sizeof(transport_count);
3221 /* Address items are in the order of items on the address chain. We
3222 remember the current address value in case this function is called
3223 several times to empty the pipe in stages. Information about delivery
3224 over TLS is sent in a preceding X item for each address. We don't put
3225 it in with the other info, in order to keep each message short enough to
3226 guarantee it won't be split in the pipe. */
3230 if (!addr) goto ADDR_MISMATCH; /* Below, in 'A' handler */
3234 addr->cipher = NULL;
3235 addr->peerdn = NULL;
3238 addr->cipher = string_copy(ptr);
3241 addr->peerdn = string_copy(ptr);
3246 (void) tls_import_cert(ptr, &addr->peercert);
3248 addr->peercert = NULL;
3253 (void) tls_import_cert(ptr, &addr->ourcert);
3255 addr->ourcert = NULL;
3258 # ifndef DISABLE_OCSP
3260 addr->ocsp = OCSP_NOT_REQ;
3262 addr->ocsp = *ptr - '0';
3268 #endif /*SUPPORT_TLS*/
3270 case 'C': /* client authenticator information */
3274 addr->authenticator = (*ptr)? string_copy(ptr) : NULL;
3277 addr->auth_id = (*ptr)? string_copy(ptr) : NULL;
3280 addr->auth_sndr = (*ptr)? string_copy(ptr) : NULL;
3286 #ifndef DISABLE_PRDR
3288 addr->flags |= af_prdr_used;
3293 if (!addr) goto ADDR_MISMATCH;
3294 memcpy(&(addr->dsn_aware), ptr, sizeof(addr->dsn_aware));
3295 ptr += sizeof(addr->dsn_aware);
3296 DEBUG(D_deliver) debug_printf("DSN read: addr->dsn_aware = %d\n", addr->dsn_aware);
3303 msg = string_sprintf("address count mismatch for data read from pipe "
3304 "for transport process %d for transport %s", pid,
3305 addrlist->transport->driver_name);
3312 #ifdef SUPPORT_SOCKS
3313 case '2': /* proxy information; must arrive before A0 and applies to that addr XXX oops*/
3314 proxy_session = TRUE; /*XXX shouod this be cleared somewhere? */
3319 proxy_local_address = string_copy(ptr);
3321 memcpy(&proxy_local_port, ptr, sizeof(proxy_local_port));
3322 ptr += sizeof(proxy_local_port);
3327 #ifdef EXPERIMENTAL_DSN_INFO
3328 case '1': /* must arrive before A0, and applies to that addr */
3329 /* Two strings: smtp_greeting and helo_response */
3330 addr->smtp_greeting = string_copy(ptr);
3332 addr->helo_response = string_copy(ptr);
3338 addr->transport_return = *ptr++;
3339 addr->special_action = *ptr++;
3340 memcpy(&(addr->basic_errno), ptr, sizeof(addr->basic_errno));
3341 ptr += sizeof(addr->basic_errno);
3342 memcpy(&(addr->more_errno), ptr, sizeof(addr->more_errno));
3343 ptr += sizeof(addr->more_errno);
3344 memcpy(&(addr->flags), ptr, sizeof(addr->flags));
3345 ptr += sizeof(addr->flags);
3346 addr->message = (*ptr)? string_copy(ptr) : NULL;
3348 addr->user_message = (*ptr)? string_copy(ptr) : NULL;
3351 /* Always two strings for host information, followed by the port number and DNSSEC mark */
3355 h = store_get(sizeof(host_item));
3356 h->name = string_copy(ptr);
3358 h->address = string_copy(ptr);
3360 memcpy(&(h->port), ptr, sizeof(h->port));
3361 ptr += sizeof(h->port);
3362 h->dnssec = *ptr == '2' ? DS_YES
3363 : *ptr == '1' ? DS_NO
3366 addr->host_used = h;
3370 /* Finished with this address */
3377 /* Local interface address/port */
3379 if (*ptr) sending_ip_address = string_copy(ptr);
3381 if (*ptr) sending_port = atoi(CS ptr);
3385 /* Z marks the logical end of the data. It is followed by '0' if
3386 continue_transport was NULL at the end of transporting, otherwise '1'.
3387 We need to know when it becomes NULL during a delivery down a passed SMTP
3388 channel so that we don't try to pass anything more down it. Of course, for
3389 most normal messages it will remain NULL all the time. */
3394 continue_transport = NULL;
3395 continue_hostname = NULL;
3398 DEBUG(D_deliver) debug_printf("Z0%c item read\n", *ptr);
3401 /* Anything else is a disaster. */
3404 msg = string_sprintf("malformed data (%d) read from pipe for transport "
3405 "process %d for transport %s", ptr[-1], pid,
3406 addr->transport->driver_name);
3412 /* The done flag is inspected externally, to determine whether or not to
3413 call the function again when the process finishes. */
3417 /* If the process hadn't finished, and we haven't seen the end of the data
3418 or suffered a disaster, update the rest of the state, and return FALSE to
3419 indicate "not finished". */
3428 /* Close our end of the pipe, to prevent deadlock if the far end is still
3429 pushing stuff into it. */
3434 /* If we have finished without error, but haven't had data for every address,
3435 something is wrong. */
3438 msg = string_sprintf("insufficient address data read from pipe "
3439 "for transport process %d for transport %s", pid,
3440 addr->transport->driver_name);
3442 /* If an error message is set, something has gone wrong in getting back
3443 the delivery data. Put the message into each address and freeze it. */
3446 for (addr = addrlist; addr; addr = addr->next)
3448 addr->transport_return = DEFER;
3449 addr->special_action = SPECIAL_FREEZE;
3450 addr->message = msg;
3453 /* Return TRUE to indicate we have got all we need from this process, even
3454 if it hasn't actually finished yet. */
3461 /*************************************************
3462 * Post-process a set of remote addresses *
3463 *************************************************/
3465 /* Do what has to be done immediately after a remote delivery for each set of
3466 addresses, then re-write the spool if necessary. Note that post_process_one
3467 puts the address on an appropriate queue; hence we must fish off the next
3468 one first. This function is also called if there is a problem with setting
3469 up a subprocess to do a remote delivery in parallel. In this case, the final
3470 argument contains a message, and the action must be forced to DEFER.
3473 addr pointer to chain of address items
3474 logflags flags for logging
3475 msg NULL for normal cases; -> error message for unexpected problems
3476 fallback TRUE if processing fallback hosts
3482 remote_post_process(address_item *addr, int logflags, uschar *msg,
3487 /* If any host addresses were found to be unusable, add them to the unusable
3488 tree so that subsequent deliveries don't try them. */
3490 for (h = addr->host_list; h; h = h->next)
3492 if (h->status >= hstatus_unusable) tree_add_unusable(h);
3494 /* Now handle each address on the chain. The transport has placed '=' or '-'
3495 into the special_action field for each successful delivery. */
3499 address_item *next = addr->next;
3501 /* If msg == NULL (normal processing) and the result is DEFER and we are
3502 processing the main hosts and there are fallback hosts available, put the
3503 address on the list for fallback delivery. */
3505 if ( addr->transport_return == DEFER
3506 && addr->fallback_hosts
3511 addr->host_list = addr->fallback_hosts;
3512 addr->next = addr_fallback;
3513 addr_fallback = addr;
3514 DEBUG(D_deliver) debug_printf("%s queued for fallback host(s)\n", addr->address);
3517 /* If msg is set (=> unexpected problem), set it in the address before
3518 doing the ordinary post processing. */
3524 addr->message = msg;
3525 addr->transport_return = DEFER;
3527 (void)post_process_one(addr, addr->transport_return, logflags,
3528 DTYPE_TRANSPORT, addr->special_action);
3536 /* If we have just delivered down a passed SMTP channel, and that was
3537 the last address, the channel will have been closed down. Now that
3538 we have logged that delivery, set continue_sequence to 1 so that
3539 any subsequent deliveries don't get "*" incorrectly logged. */
3541 if (!continue_transport) continue_sequence = 1;
3546 /*************************************************
3547 * Wait for one remote delivery subprocess *
3548 *************************************************/
3550 /* This function is called while doing remote deliveries when either the
3551 maximum number of processes exist and we need one to complete so that another
3552 can be created, or when waiting for the last ones to complete. It must wait for
3553 the completion of one subprocess, empty the control block slot, and return a
3554 pointer to the address chain.
3557 Returns: pointer to the chain of addresses handled by the process;
3558 NULL if no subprocess found - this is an unexpected error
3561 static address_item *
3564 int poffset, status;
3565 address_item *addr, *addrlist;
3568 set_process_info("delivering %s: waiting for a remote delivery subprocess "
3569 "to finish", message_id);
3571 /* Loop until either a subprocess completes, or there are no subprocesses in
3572 existence - in which case give an error return. We cannot proceed just by
3573 waiting for a completion, because a subprocess may have filled up its pipe, and
3574 be waiting for it to be emptied. Therefore, if no processes have finished, we
3575 wait for one of the pipes to acquire some data by calling select(), with a
3576 timeout just in case.
3578 The simple approach is just to iterate after reading data from a ready pipe.
3579 This leads to non-ideal behaviour when the subprocess has written its final Z
3580 item, closed the pipe, and is in the process of exiting (the common case). A
3581 call to waitpid() yields nothing completed, but select() shows the pipe ready -
3582 reading it yields EOF, so you end up with busy-waiting until the subprocess has
3585 To avoid this, if all the data that is needed has been read from a subprocess
3586 after select(), an explicit wait() for it is done. We know that all it is doing
3587 is writing to the pipe and then exiting, so the wait should not be long.
3589 The non-blocking waitpid() is to some extent just insurance; if we could
3590 reliably detect end-of-file on the pipe, we could always know when to do a
3591 blocking wait() for a completed process. However, because some systems use
3592 NDELAY, which doesn't distinguish between EOF and pipe empty, it is easier to
3593 use code that functions without the need to recognize EOF.
3595 There's a double loop here just in case we end up with a process that is not in
3596 the list of remote delivery processes. Something has obviously gone wrong if
3597 this is the case. (For example, a process that is incorrectly left over from
3598 routing or local deliveries might be found.) The damage can be minimized by
3599 looping back and looking for another process. If there aren't any, the error
3600 return will happen. */
3602 for (;;) /* Normally we do not repeat this loop */
3604 while ((pid = waitpid(-1, &status, WNOHANG)) <= 0)
3607 fd_set select_pipes;
3608 int maxpipe, readycount;
3610 /* A return value of -1 can mean several things. If errno != ECHILD, it
3611 either means invalid options (which we discount), or that this process was
3612 interrupted by a signal. Just loop to try the waitpid() again.
3614 If errno == ECHILD, waitpid() is telling us that there are no subprocesses
3615 in existence. This should never happen, and is an unexpected error.
3616 However, there is a nasty complication when running under Linux. If "strace
3617 -f" is being used under Linux to trace this process and its children,
3618 subprocesses are "stolen" from their parents and become the children of the
3619 tracing process. A general wait such as the one we've just obeyed returns
3620 as if there are no children while subprocesses are running. Once a
3621 subprocess completes, it is restored to the parent, and waitpid(-1) finds
3622 it. Thanks to Joachim Wieland for finding all this out and suggesting a
3625 This does not happen using "truss" on Solaris, nor (I think) with other
3626 tracing facilities on other OS. It seems to be specific to Linux.
3628 What we do to get round this is to use kill() to see if any of our
3629 subprocesses are still in existence. If kill() gives an OK return, we know
3630 it must be for one of our processes - it can't be for a re-use of the pid,
3631 because if our process had finished, waitpid() would have found it. If any
3632 of our subprocesses are in existence, we proceed to use select() as if
3633 waitpid() had returned zero. I think this is safe. */
3637 if (errno != ECHILD) continue; /* Repeats the waitpid() */
3640 debug_printf("waitpid() returned -1/ECHILD: checking explicitly "
3641 "for process existence\n");
3643 for (poffset = 0; poffset < remote_max_parallel; poffset++)
3645 if ((pid = parlist[poffset].pid) != 0 && kill(pid, 0) == 0)
3647 DEBUG(D_deliver) debug_printf("process %d still exists: assume "
3648 "stolen by strace\n", (int)pid);
3649 break; /* With poffset set */
3653 if (poffset >= remote_max_parallel)
3655 DEBUG(D_deliver) debug_printf("*** no delivery children found\n");
3656 return NULL; /* This is the error return */
3660 /* A pid value greater than 0 breaks the "while" loop. A negative value has
3661 been handled above. A return value of zero means that there is at least one
3662 subprocess, but there are no completed subprocesses. See if any pipes are
3663 ready with any data for reading. */
3665 DEBUG(D_deliver) debug_printf("selecting on subprocess pipes\n");
3668 FD_ZERO(&select_pipes);
3669 for (poffset = 0; poffset < remote_max_parallel; poffset++)
3671 if (parlist[poffset].pid != 0)
3673 int fd = parlist[poffset].fd;
3674 FD_SET(fd, &select_pipes);
3675 if (fd > maxpipe) maxpipe = fd;
3679 /* Stick in a 60-second timeout, just in case. */
3684 readycount = select(maxpipe + 1, (SELECT_ARG2_TYPE *)&select_pipes,
3687 /* Scan through the pipes and read any that are ready; use the count
3688 returned by select() to stop when there are no more. Select() can return
3689 with no processes (e.g. if interrupted). This shouldn't matter.
3691 If par_read_pipe() returns TRUE, it means that either the terminating Z was
3692 read, or there was a disaster. In either case, we are finished with this
3693 process. Do an explicit wait() for the process and break the main loop if
3696 It turns out that we have to deal with the case of an interrupted system
3697 call, which can happen on some operating systems if the signal handling is
3698 set up to do that by default. */
3701 readycount > 0 && poffset < remote_max_parallel;
3704 if ( (pid = parlist[poffset].pid) != 0
3705 && FD_ISSET(parlist[poffset].fd, &select_pipes)
3709 if (par_read_pipe(poffset, FALSE)) /* Finished with this pipe */
3711 for (;;) /* Loop for signals */
3713 pid_t endedpid = waitpid(pid, &status, 0);
3714 if (endedpid == pid) goto PROCESS_DONE;
3715 if (endedpid != (pid_t)(-1) || errno != EINTR)
3716 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Unexpected error return "
3717 "%d (errno = %d) from waitpid() for process %d",
3718 (int)endedpid, errno, (int)pid);
3724 /* Now go back and look for a completed subprocess again. */
3727 /* A completed process was detected by the non-blocking waitpid(). Find the
3728 data block that corresponds to this subprocess. */
3730 for (poffset = 0; poffset < remote_max_parallel; poffset++)
3731 if (pid == parlist[poffset].pid) break;
3733 /* Found the data block; this is a known remote delivery process. We don't
3734 need to repeat the outer loop. This should be what normally happens. */
3736 if (poffset < remote_max_parallel) break;
3738 /* This situation is an error, but it's probably better to carry on looking
3739 for another process than to give up (as we used to do). */
3741 log_write(0, LOG_MAIN|LOG_PANIC, "Process %d finished: not found in remote "
3742 "transport process list", pid);
3743 } /* End of the "for" loop */
3745 /* Come here when all the data was completely read after a select(), and
3746 the process in pid has been wait()ed for. */
3753 debug_printf("remote delivery process %d ended\n", (int)pid);
3755 debug_printf("remote delivery process %d ended: status=%04x\n", (int)pid,
3759 set_process_info("delivering %s", message_id);
3761 /* Get the chain of processed addresses */
3763 addrlist = parlist[poffset].addrlist;
3765 /* If the process did not finish cleanly, record an error and freeze (except
3766 for SIGTERM, SIGKILL and SIGQUIT), and also ensure the journal is not removed,
3767 in case the delivery did actually happen. */
3769 if ((status & 0xffff) != 0)
3772 int msb = (status >> 8) & 255;
3773 int lsb = status & 255;
3774 int code = (msb == 0)? (lsb & 0x7f) : msb;
3776 msg = string_sprintf("%s transport process returned non-zero status 0x%04x: "
3778 addrlist->transport->driver_name,
3780 (msb == 0)? "terminated by signal" : "exit code",
3783 if (msb != 0 || (code != SIGTERM && code != SIGKILL && code != SIGQUIT))
3784 addrlist->special_action = SPECIAL_FREEZE;
3786 for (addr = addrlist; addr; addr = addr->next)
3788 addr->transport_return = DEFER;
3789 addr->message = msg;
3792 remove_journal = FALSE;
3795 /* Else complete reading the pipe to get the result of the delivery, if all
3796 the data has not yet been obtained. */
3798 else if (!parlist[poffset].done) (void)par_read_pipe(poffset, TRUE);
3800 /* Put the data count and return path into globals, mark the data slot unused,
3801 decrement the count of subprocesses, and return the address chain. */
3803 transport_count = parlist[poffset].transport_count;
3804 used_return_path = parlist[poffset].return_path;
3805 parlist[poffset].pid = 0;
3812 /*************************************************
3813 * Wait for subprocesses and post-process *
3814 *************************************************/
3816 /* This function waits for subprocesses until the number that are still running
3817 is below a given threshold. For each complete subprocess, the addresses are
3818 post-processed. If we can't find a running process, there is some shambles.
3819 Better not bomb out, as that might lead to multiple copies of the message. Just
3820 log and proceed as if all done.
3823 max maximum number of subprocesses to leave running
3824 fallback TRUE if processing fallback hosts
3830 par_reduce(int max, BOOL fallback)
3832 while (parcount > max)
3834 address_item *doneaddr = par_wait();
3837 log_write(0, LOG_MAIN|LOG_PANIC,
3838 "remote delivery process count got out of step");
3843 transport_instance * tp = doneaddr->transport;
3844 if (tp->max_parallel)
3845 enq_end(string_sprintf("tpt-serialize-%s", tp->name));
3847 remote_post_process(doneaddr, LOG_MAIN, NULL, fallback);
3856 rmt_dlv_checked_write(int fd, char id, char subid, void * buf, int size)
3858 uschar writebuffer[PIPE_HEADER_SIZE + BIG_BUFFER_SIZE];
3862 /* we assume that size can't get larger then BIG_BUFFER_SIZE which currently is set to 16k */
3863 /* complain to log if someone tries with buffer sizes we can't handle*/
3867 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3868 "Failed writing transport result to pipe: can't handle buffers > 99999 bytes. truncating!\n");
3872 /* to keep the write() atomic we build header in writebuffer and copy buf behind */
3873 /* two write() calls would increase the complexity of reading from pipe */
3875 /* convert size to human readable string prepended by id and subid */
3876 header_length = snprintf(CS writebuffer, PIPE_HEADER_SIZE+1, "%c%c%05d", id, subid, size);
3877 if (header_length != PIPE_HEADER_SIZE)
3879 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "header snprintf failed\n");
3880 writebuffer[0] = '\0';
3883 DEBUG(D_deliver) debug_printf("header write id:%c,subid:%c,size:%d,final:%s\n",
3884 id, subid, size, writebuffer);
3886 if (buf && size > 0)
3887 memcpy(writebuffer + PIPE_HEADER_SIZE, buf, size);
3889 size += PIPE_HEADER_SIZE;
3890 if ((ret = write(fd, writebuffer, size)) != size)
3891 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Failed writing transport result to pipe: %s\n",
3892 ret == -1 ? strerror(errno) : "short write");
3895 /*************************************************
3896 * Do remote deliveries *
3897 *************************************************/
3899 /* This function is called to process the addresses in addr_remote. We must
3900 pick off the queue all addresses that have the same transport, remote
3901 destination, and errors address, and hand them to the transport in one go,
3902 subject to some configured limitations. If this is a run to continue delivering
3903 to an existing delivery channel, skip all but those addresses that can go to
3904 that channel. The skipped addresses just get deferred.
3906 If mua_wrapper is set, all addresses must be able to be sent in a single
3907 transaction. If not, this function yields FALSE.
3909 In Exim 4, remote deliveries are always done in separate processes, even
3910 if remote_max_parallel = 1 or if there's only one delivery to do. The reason
3911 is so that the base process can retain privilege. This makes the
3912 implementation of fallback transports feasible (though not initially done.)
3914 We create up to the configured number of subprocesses, each of which passes
3915 back the delivery state via a pipe. (However, when sending down an existing
3916 connection, remote_max_parallel is forced to 1.)
3919 fallback TRUE if processing fallback hosts
3921 Returns: TRUE normally
3922 FALSE if mua_wrapper is set and the addresses cannot all be sent
3927 do_remote_deliveries(BOOL fallback)
3933 parcount = 0; /* Number of executing subprocesses */
3935 /* When sending down an existing channel, only do one delivery at a time.
3936 We use a local variable (parmax) to hold the maximum number of processes;
3937 this gets reduced from remote_max_parallel if we can't create enough pipes. */
3939 if (continue_transport) remote_max_parallel = 1;
3940 parmax = remote_max_parallel;
3942 /* If the data for keeping a list of processes hasn't yet been
3947 parlist = store_get(remote_max_parallel * sizeof(pardata));
3948 for (poffset = 0; poffset < remote_max_parallel; poffset++)
3949 parlist[poffset].pid = 0;
3952 /* Now loop for each remote delivery */
3954 for (delivery_count = 0; addr_remote; delivery_count++)
3960 int address_count = 1;
3961 int address_count_max;
3963 BOOL use_initgroups;
3964 BOOL pipe_done = FALSE;
3965 transport_instance *tp;
3966 address_item **anchor = &addr_remote;
3967 address_item *addr = addr_remote;
3968 address_item *last = addr;
3971 uschar * serialize_key = NULL;
3973 /* Pull the first address right off the list. */
3975 addr_remote = addr->next;
3978 DEBUG(D_deliver|D_transport)
3979 debug_printf("--------> %s <--------\n", addr->address);
3981 /* If no transport has been set, there has been a big screw-up somewhere. */
3983 if (!(tp = addr->transport))
3985 disable_logging = FALSE; /* Jic */
3986 panicmsg = US"No transport set by router";
3987 goto panic_continue;
3990 /* Check that this base address hasn't previously been delivered to this
3991 transport. The check is necessary at this point to handle homonymic addresses
3992 correctly in cases where the pattern of redirection changes between delivery
3993 attempts. Non-homonymic previous delivery is detected earlier, at routing
3996 if (previously_transported(addr, FALSE)) continue;
3998 /* Force failure if the message is too big. */
4000 if (tp->message_size_limit)
4002 int rc = check_message_size(tp, addr);
4005 addr->transport_return = rc;
4006 remote_post_process(addr, LOG_MAIN, NULL, fallback);
4011 /* Get the flag which specifies whether the transport can handle different
4012 domains that nevertheless resolve to the same set of hosts. If it needs
4013 expanding, get variables set: $address_data, $domain_data, $localpart_data,
4014 $host, $host_address, $host_port. */
4015 if (tp->expand_multi_domain)
4016 deliver_set_expansions(addr);
4018 if (exp_bool(addr, US"transport", tp->name, D_transport,
4019 US"multi_domain", tp->multi_domain, tp->expand_multi_domain,
4020 &multi_domain) != OK)
4022 deliver_set_expansions(NULL);
4023 panicmsg = addr->message;
4024 goto panic_continue;
4027 /* Get the maximum it can handle in one envelope, with zero meaning
4028 unlimited, which is forced for the MUA wrapper case. */
4030 address_count_max = tp->max_addresses;
4031 if (address_count_max == 0 || mua_wrapper) address_count_max = 999999;
4034 /************************************************************************/
4035 /***** This is slightly experimental code, but should be safe. *****/
4037 /* The address_count_max value is the maximum number of addresses that the
4038 transport can send in one envelope. However, the transport must be capable of
4039 dealing with any number of addresses. If the number it gets exceeds its
4040 envelope limitation, it must send multiple copies of the message. This can be
4041 done over a single connection for SMTP, so uses less resources than making
4042 multiple connections. On the other hand, if remote_max_parallel is greater
4043 than one, it is perhaps a good idea to use parallel processing to move the
4044 message faster, even if that results in multiple simultaneous connections to
4047 How can we come to some compromise between these two ideals? What we do is to
4048 limit the number of addresses passed to a single instance of a transport to
4049 the greater of (a) its address limit (rcpt_max for SMTP) and (b) the total
4050 number of addresses routed to remote transports divided by
4051 remote_max_parallel. For example, if the message has 100 remote recipients,
4052 remote max parallel is 2, and rcpt_max is 10, we'd never send more than 50 at
4053 once. But if rcpt_max is 100, we could send up to 100.
4055 Of course, not all the remotely addresses in a message are going to go to the
4056 same set of hosts (except in smarthost configurations), so this is just a
4057 heuristic way of dividing up the work.
4059 Furthermore (1), because this may not be wanted in some cases, and also to
4060 cope with really pathological cases, there is also a limit to the number of
4061 messages that are sent over one connection. This is the same limit that is
4062 used when sending several different messages over the same connection.
4063 Continue_sequence is set when in this situation, to the number sent so
4064 far, including this message.
4066 Furthermore (2), when somebody explicitly sets the maximum value to 1, it
4067 is probably because they are using VERP, in which case they want to pass only
4068 one address at a time to the transport, in order to be able to use
4069 $local_part and $domain in constructing a new return path. We could test for
4070 the use of these variables, but as it is so likely they will be used when the
4071 maximum is 1, we don't bother. Just leave the value alone. */
4073 if ( address_count_max != 1
4074 && address_count_max < remote_delivery_count/remote_max_parallel
4077 int new_max = remote_delivery_count/remote_max_parallel;
4078 int message_max = tp->connection_max_messages;
4079 if (connection_max_messages >= 0) message_max = connection_max_messages;
4080 message_max -= continue_sequence - 1;
4081 if (message_max > 0 && new_max > address_count_max * message_max)
4082 new_max = address_count_max * message_max;
4083 address_count_max = new_max;
4086 /************************************************************************/
4089 /* Pick off all addresses which have the same transport, errors address,
4090 destination, and extra headers. In some cases they point to the same host
4091 list, but we also need to check for identical host lists generated from
4092 entirely different domains. The host list pointers can be NULL in the case
4093 where the hosts are defined in the transport. There is also a configured
4094 maximum limit of addresses that can be handled at once (see comments above
4095 for how it is computed).
4096 If the transport does not handle multiple domains, enforce that also,
4097 and if it might need a per-address check for this, re-evaluate it.
4100 while ((next = *anchor) && address_count < address_count_max)
4103 if ( (multi_domain || Ustrcmp(next->domain, addr->domain) == 0)
4104 && tp == next->transport
4105 && same_hosts(next->host_list, addr->host_list)
4106 && same_strings(next->prop.errors_address, addr->prop.errors_address)
4107 && same_headers(next->prop.extra_headers, addr->prop.extra_headers)
4108 && same_ugid(tp, next, addr)
4109 && ( next->prop.remove_headers == addr->prop.remove_headers
4110 || ( next->prop.remove_headers
4111 && addr->prop.remove_headers
4112 && Ustrcmp(next->prop.remove_headers, addr->prop.remove_headers) == 0
4116 !tp->expand_multi_domain || (deliver_set_expansions(next), 1),
4118 US"transport", next->transport->name, D_transport,
4119 US"multi_domain", next->transport->multi_domain,
4120 next->transport->expand_multi_domain, &md) == OK
4125 *anchor = next->next;
4127 next->first = addr; /* remember top one (for retry processing) */
4132 else anchor = &(next->next);
4133 deliver_set_expansions(NULL);
4136 /* If we are acting as an MUA wrapper, all addresses must go in a single
4137 transaction. If not, put them back on the chain and yield FALSE. */
4139 if (mua_wrapper && addr_remote)
4141 last->next = addr_remote;
4146 /* If the transport is limited for parallellism, enforce that here.
4147 The hints DB entry is decremented in par_reduce(), when we reap the
4148 transport process. */
4150 if (tpt_parallel_check(tp, addr, &serialize_key))
4151 if ((panicmsg = expand_string_message))
4152 goto panic_continue;
4154 continue; /* Loop for the next set of addresses. */
4156 /* Set up the expansion variables for this set of addresses */
4158 deliver_set_expansions(addr);
4160 /* Ensure any transport-set auth info is fresh */
4161 addr->authenticator = addr->auth_id = addr->auth_sndr = NULL;
4163 /* Compute the return path, expanding a new one if required. The old one
4164 must be set first, as it might be referred to in the expansion. */
4166 if(addr->prop.errors_address)
4167 return_path = addr->prop.errors_address;
4168 #ifdef EXPERIMENTAL_SRS
4169 else if(addr->prop.srs_sender)
4170 return_path = addr->prop.srs_sender;
4173 return_path = sender_address;
4175 if (tp->return_path)
4177 uschar *new_return_path = expand_string(tp->return_path);
4178 if (new_return_path)
4179 return_path = new_return_path;
4180 else if (!expand_string_forcedfail)
4182 panicmsg = string_sprintf("Failed to expand return path \"%s\": %s",
4183 tp->return_path, expand_string_message);
4188 /* Find the uid, gid, and use_initgroups setting for this transport. Failure
4189 logs and sets up error messages, so we just post-process and continue with
4190 the next address. */
4192 if (!findugid(addr, tp, &uid, &gid, &use_initgroups))
4198 /* If this transport has a setup function, call it now so that it gets
4199 run in this process and not in any subprocess. That way, the results of
4200 any setup that are retained by the transport can be reusable. One of the
4201 things the setup does is to set the fallback host lists in the addresses.
4202 That is why it is called at this point, before the continue delivery
4203 processing, because that might use the fallback hosts. */
4206 (void)((tp->setup)(addr->transport, addr, NULL, uid, gid, NULL));
4208 /* If this is a run to continue delivery down an already-established
4209 channel, check that this set of addresses matches the transport and
4210 the channel. If it does not, defer the addresses. If a host list exists,
4211 we must check that the continue host is on the list. Otherwise, the
4212 host is set in the transport. */
4214 continue_more = FALSE; /* In case got set for the last lot */
4215 if (continue_transport)
4217 BOOL ok = Ustrcmp(continue_transport, tp->name) == 0;
4218 if (ok && addr->host_list)
4222 for (h = addr->host_list; h; h = h->next)
4223 if (Ustrcmp(h->name, continue_hostname) == 0)
4224 { ok = TRUE; break; }
4227 /* Addresses not suitable; defer or queue for fallback hosts (which
4228 might be the continue host) and skip to next address. */
4232 DEBUG(D_deliver) debug_printf("not suitable for continue_transport\n");
4233 if (serialize_key) enq_end(serialize_key);
4235 if (addr->fallback_hosts && !fallback)
4237 for (next = addr; ; next = next->next)
4239 next->host_list = next->fallback_hosts;
4240 DEBUG(D_deliver) debug_printf("%s queued for fallback host(s)\n", next->address);
4241 if (!next->next) break;
4243 next->next = addr_fallback;
4244 addr_fallback = addr;
4249 while (next->next) next = next->next;
4250 next->next = addr_defer;
4257 /* Set a flag indicating whether there are further addresses that list
4258 the continued host. This tells the transport to leave the channel open,
4259 but not to pass it to another delivery process. */
4261 for (next = addr_remote; next; next = next->next)
4264 for (h = next->host_list; h; h = h->next)
4265 if (Ustrcmp(h->name, continue_hostname) == 0)
4266 { continue_more = TRUE; break; }
4270 /* The transports set up the process info themselves as they may connect
4271 to more than one remote machine. They also have to set up the filter
4272 arguments, if required, so that the host name and address are available
4275 transport_filter_argv = NULL;
4277 /* Create the pipe for inter-process communication. If pipe creation
4278 fails, it is probably because the value of remote_max_parallel is so
4279 large that too many file descriptors for pipes have been created. Arrange
4280 to wait for a process to finish, and then try again. If we still can't
4281 create a pipe when all processes have finished, break the retry loop. */
4285 if (pipe(pfd) == 0) pipe_done = TRUE;
4286 else if (parcount > 0) parmax = parcount;
4289 /* We need to make the reading end of the pipe non-blocking. There are
4290 two different options for this. Exim is cunningly (I hope!) coded so
4291 that it can use either of them, though it prefers O_NONBLOCK, which
4292 distinguishes between EOF and no-more-data. */
4295 (void)fcntl(pfd[pipe_read], F_SETFL, O_NONBLOCK);
4297 (void)fcntl(pfd[pipe_read], F_SETFL, O_NDELAY);
4300 /* If the maximum number of subprocesses already exist, wait for a process
4301 to finish. If we ran out of file descriptors, parmax will have been reduced
4302 from its initial value of remote_max_parallel. */
4304 par_reduce(parmax - 1, fallback);
4307 /* If we failed to create a pipe and there were no processes to wait
4308 for, we have to give up on this one. Do this outside the above loop
4309 so that we can continue the main loop. */
4313 panicmsg = string_sprintf("unable to create pipe: %s", strerror(errno));
4317 /* Find a free slot in the pardata list. Must do this after the possible
4318 waiting for processes to finish, because a terminating process will free
4321 for (poffset = 0; poffset < remote_max_parallel; poffset++)
4322 if (parlist[poffset].pid == 0)
4325 /* If there isn't one, there has been a horrible disaster. */
4327 if (poffset >= remote_max_parallel)
4329 (void)close(pfd[pipe_write]);
4330 (void)close(pfd[pipe_read]);
4331 panicmsg = US"Unexpectedly no free subprocess slot";
4335 /* Now fork a subprocess to do the remote delivery, but before doing so,
4336 ensure that any cached resourses are released so as not to interfere with
4337 what happens in the subprocess. */
4341 if ((pid = fork()) == 0)
4343 int fd = pfd[pipe_write];
4346 /* Setting this global in the subprocess means we need never clear it */
4347 transport_name = tp->name;
4349 /* There are weird circumstances in which logging is disabled */
4350 disable_logging = tp->disable_logging;
4352 /* Show pids on debug output if parallelism possible */
4354 if (parmax > 1 && (parcount > 0 || addr_remote))
4356 DEBUG(D_any|D_v) debug_selector |= D_pid;
4357 DEBUG(D_deliver) debug_printf("Remote delivery process started\n");
4360 /* Reset the random number generator, so different processes don't all
4361 have the same sequence. In the test harness we want different, but
4362 predictable settings for each delivery process, so do something explicit
4363 here rather they rely on the fixed reset in the random number function. */
4365 random_seed = running_in_test_harness? 42 + 2*delivery_count : 0;
4367 /* Set close-on-exec on the pipe so that it doesn't get passed on to
4368 a new process that may be forked to do another delivery down the same
4371 (void)fcntl(fd, F_SETFD, fcntl(fd, F_GETFD) | FD_CLOEXEC);
4373 /* Close open file descriptors for the pipes of other processes
4374 that are running in parallel. */
4376 for (poffset = 0; poffset < remote_max_parallel; poffset++)
4377 if (parlist[poffset].pid != 0) (void)close(parlist[poffset].fd);
4379 /* This process has inherited a copy of the file descriptor
4380 for the data file, but its file pointer is shared with all the
4381 other processes running in parallel. Therefore, we have to re-open
4382 the file in order to get a new file descriptor with its own
4383 file pointer. We don't need to lock it, as the lock is held by
4384 the parent process. There doesn't seem to be any way of doing
4385 a dup-with-new-file-pointer. */
4387 (void)close(deliver_datafile);
4388 sprintf(CS spoolname, "%s/input/%s/%s-D", spool_directory, message_subdir,
4390 deliver_datafile = Uopen(spoolname, O_RDWR | O_APPEND, 0);
4392 if (deliver_datafile < 0)
4393 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Failed to reopen %s for remote "
4394 "parallel delivery: %s", spoolname, strerror(errno));
4396 /* Set the close-on-exec flag */
4398 (void)fcntl(deliver_datafile, F_SETFD, fcntl(deliver_datafile, F_GETFD) |
4401 /* Set the uid/gid of this process; bombs out on failure. */
4403 exim_setugid(uid, gid, use_initgroups,
4404 string_sprintf("remote delivery to %s with transport=%s",
4405 addr->address, tp->name));
4407 /* Close the unwanted half of this process' pipe, set the process state,
4408 and run the transport. Afterwards, transport_count will contain the number
4409 of bytes written. */
4411 (void)close(pfd[pipe_read]);
4412 set_process_info("delivering %s using %s", message_id, tp->name);
4413 debug_print_string(tp->debug_string);
4414 if (!(tp->info->code)(addr->transport, addr)) replicate_status(addr);
4416 set_process_info("delivering %s (just run %s for %s%s in subprocess)",
4417 message_id, tp->name, addr->address, addr->next ? ", ..." : "");
4419 /* Ensure any cached resources that we used are now released */
4423 /* Pass the result back down the pipe. This is a lot more information
4424 than is needed for a local delivery. We have to send back the error
4425 status for each address, the usability status for each host that is
4426 flagged as unusable, and all the retry items. When TLS is in use, we
4427 send also the cipher and peerdn information. Each type of information
4428 is flagged by an identifying byte, and is then in a fixed format (with
4429 strings terminated by zeros), and there is a final terminator at the
4430 end. The host information and retry information is all attached to
4431 the first address, so that gets sent at the start. */
4433 /* Host unusability information: for most success cases this will
4436 for (h = addr->host_list; h; h = h->next)
4438 if (!h->address || h->status < hstatus_unusable) continue;
4439 sprintf(CS big_buffer, "%c%c%s", h->status, h->why, h->address);
4440 rmt_dlv_checked_write(fd, 'H', '0', big_buffer, Ustrlen(big_buffer+2) + 3);
4443 /* The number of bytes written. This is the same for each address. Even
4444 if we sent several copies of the message down the same connection, the
4445 size of each one is the same, and it's that value we have got because
4446 transport_count gets reset before calling transport_write_message(). */
4448 memcpy(big_buffer, &transport_count, sizeof(transport_count));
4449 rmt_dlv_checked_write(fd, 'S', '0', big_buffer, sizeof(transport_count));
4451 /* Information about what happened to each address. Four item types are
4452 used: an optional 'X' item first, for TLS information, then an optional "C"
4453 item for any client-auth info followed by 'R' items for any retry settings,
4454 and finally an 'A' item for the remaining data. */
4456 for(; addr; addr = addr->next)
4461 /* The certificate verification status goes into the flags */
4462 if (tls_out.certificate_verified) setflag(addr, af_cert_verified);
4463 #ifdef EXPERIMENTAL_DANE
4464 if (tls_out.dane_verified) setflag(addr, af_dane_verified);
4467 /* Use an X item only if there's something to send */
4471 ptr = big_buffer + sprintf(CS big_buffer, "%.128s", addr->cipher) + 1;
4476 ptr += sprintf(CS ptr, "%.512s", addr->peerdn);
4480 rmt_dlv_checked_write(fd, 'X', '1', big_buffer, ptr - big_buffer);
4485 if (!tls_export_cert(ptr, big_buffer_size-2, addr->peercert))
4489 rmt_dlv_checked_write(fd, 'X', '2', big_buffer, ptr - big_buffer);
4494 if (!tls_export_cert(ptr, big_buffer_size-2, addr->ourcert))
4498 rmt_dlv_checked_write(fd, 'X', '3', big_buffer, ptr - big_buffer);
4500 # ifndef DISABLE_OCSP
4501 if (addr->ocsp > OCSP_NOT_REQ)
4503 ptr = big_buffer + sprintf(CS big_buffer, "%c", addr->ocsp + '0') + 1;
4504 rmt_dlv_checked_write(fd, 'X', '4', big_buffer, ptr - big_buffer);
4507 #endif /*SUPPORT_TLS*/
4509 if (client_authenticator)
4511 ptr = big_buffer + sprintf(CS big_buffer, "%.64s", client_authenticator) + 1;
4512 rmt_dlv_checked_write(fd, 'C', '1', big_buffer, ptr - big_buffer);
4514 if (client_authenticated_id)
4516 ptr = big_buffer + sprintf(CS big_buffer, "%.64s", client_authenticated_id) + 1;
4517 rmt_dlv_checked_write(fd, 'C', '2', big_buffer, ptr - big_buffer);
4519 if (client_authenticated_sender)
4521 ptr = big_buffer + sprintf(CS big_buffer, "%.64s", client_authenticated_sender) + 1;
4522 rmt_dlv_checked_write(fd, 'C', '3', big_buffer, ptr - big_buffer);
4525 #ifndef DISABLE_PRDR
4526 if (addr->flags & af_prdr_used)
4527 rmt_dlv_checked_write(fd, 'P', '0', NULL, 0);
4530 memcpy(big_buffer, &addr->dsn_aware, sizeof(addr->dsn_aware));
4531 rmt_dlv_checked_write(fd, 'D', '0', big_buffer, sizeof(addr->dsn_aware));
4532 DEBUG(D_deliver) debug_printf("DSN write: addr->dsn_aware = %d\n", addr->dsn_aware);
4534 /* Retry information: for most success cases this will be null. */
4536 for (r = addr->retries; r; r = r->next)
4538 sprintf(CS big_buffer, "%c%.500s", r->flags, r->key);
4539 ptr = big_buffer + Ustrlen(big_buffer+2) + 3;
4540 memcpy(ptr, &(r->basic_errno), sizeof(r->basic_errno));
4541 ptr += sizeof(r->basic_errno);
4542 memcpy(ptr, &(r->more_errno), sizeof(r->more_errno));
4543 ptr += sizeof(r->more_errno);
4544 if (!r->message) *ptr++ = 0; else
4546 sprintf(CS ptr, "%.512s", r->message);
4549 rmt_dlv_checked_write(fd, 'R', '0', big_buffer, ptr - big_buffer);
4552 #ifdef SUPPORT_SOCKS
4553 if (LOGGING(proxy) && proxy_session)
4556 if (proxy_local_address)
4558 DEBUG(D_deliver) debug_printf("proxy_local_address '%s'\n", proxy_local_address);
4559 ptr = big_buffer + sprintf(CS ptr, "%.128s", proxy_local_address) + 1;
4560 DEBUG(D_deliver) debug_printf("proxy_local_port %d\n", proxy_local_port);
4561 memcpy(ptr, &proxy_local_port, sizeof(proxy_local_port));
4562 ptr += sizeof(proxy_local_port);
4566 rmt_dlv_checked_write(fd, 'A', '2', big_buffer, ptr - big_buffer);
4570 #ifdef EXPERIMENTAL_DSN_INFO
4571 /*um, are they really per-addr? Other per-conn stuff is not (auth, tls). But host_used is! */
4572 if (addr->smtp_greeting)
4574 DEBUG(D_deliver) debug_printf("smtp_greeting '%s'\n", addr->smtp_greeting);
4575 ptr = big_buffer + sprintf(CS big_buffer, "%.128s", addr->smtp_greeting) + 1;
4576 if (addr->helo_response)
4578 DEBUG(D_deliver) debug_printf("helo_response '%s'\n", addr->helo_response);
4579 ptr += sprintf(CS ptr, "%.128s", addr->helo_response) + 1;
4583 rmt_dlv_checked_write(fd, 'A', '1', big_buffer, ptr - big_buffer);
4587 /* The rest of the information goes in an 'A0' item. */
4589 sprintf(CS big_buffer, "%c%c", addr->transport_return, addr->special_action);
4590 ptr = big_buffer + 2;
4591 memcpy(ptr, &(addr->basic_errno), sizeof(addr->basic_errno));
4592 ptr += sizeof(addr->basic_errno);
4593 memcpy(ptr, &(addr->more_errno), sizeof(addr->more_errno));
4594 ptr += sizeof(addr->more_errno);
4595 memcpy(ptr, &(addr->flags), sizeof(addr->flags));
4596 ptr += sizeof(addr->flags);
4598 if (!addr->message) *ptr++ = 0; else
4599 ptr += sprintf(CS ptr, "%.1024s", addr->message) + 1;
4601 if (!addr->user_message) *ptr++ = 0; else
4602 ptr += sprintf(CS ptr, "%.1024s", addr->user_message) + 1;
4604 if (!addr->host_used) *ptr++ = 0; else
4606 ptr += sprintf(CS ptr, "%.256s", addr->host_used->name) + 1;
4607 ptr += sprintf(CS ptr, "%.64s", addr->host_used->address) + 1;
4608 memcpy(ptr, &(addr->host_used->port), sizeof(addr->host_used->port));
4609 ptr += sizeof(addr->host_used->port);
4611 /* DNS lookup status */
4612 *ptr++ = addr->host_used->dnssec==DS_YES ? '2'
4613 : addr->host_used->dnssec==DS_NO ? '1' : '0';
4616 rmt_dlv_checked_write(fd, 'A', '0', big_buffer, ptr - big_buffer);
4619 /* Local interface address/port */
4620 #ifdef EXPERIMENTAL_DSN_INFO
4621 if (sending_ip_address)
4623 if (LOGGING(incoming_interface) && sending_ip_address)
4627 ptr = big_buffer + sprintf(CS big_buffer, "%.128s", sending_ip_address) + 1;
4628 ptr += sprintf(CS ptr, "%d", sending_port) + 1;
4629 rmt_dlv_checked_write(fd, 'I', '0', big_buffer, ptr - big_buffer);
4632 /* Add termination flag, close the pipe, and that's it. The character
4633 after 'Z' indicates whether continue_transport is now NULL or not.
4634 A change from non-NULL to NULL indicates a problem with a continuing
4637 big_buffer[0] = continue_transport ? '1' : '0';
4638 rmt_dlv_checked_write(fd, 'Z', '0', big_buffer, 1);
4643 /* Back in the mainline: close the unwanted half of the pipe. */
4645 (void)close(pfd[pipe_write]);
4647 /* Fork failed; defer with error message */
4651 (void)close(pfd[pipe_read]);
4652 panicmsg = string_sprintf("fork failed for remote delivery to %s: %s",
4653 addr->domain, strerror(errno));
4657 /* Fork succeeded; increment the count, and remember relevant data for
4658 when the process finishes. */
4661 parlist[poffset].addrlist = parlist[poffset].addr = addr;
4662 parlist[poffset].pid = pid;
4663 parlist[poffset].fd = pfd[pipe_read];
4664 parlist[poffset].done = FALSE;
4665 parlist[poffset].msg = NULL;
4666 parlist[poffset].return_path = return_path;
4668 /* If the process we've just started is sending a message down an existing
4669 channel, wait for it now. This ensures that only one such process runs at
4670 once, whatever the value of remote_max parallel. Otherwise, we might try to
4671 send two or more messages simultaneously down the same channel. This could
4672 happen if there are different domains that include the same host in otherwise
4673 different host lists.
4675 Also, if the transport closes down the channel, this information gets back
4676 (continue_transport gets set to NULL) before we consider any other addresses
4679 if (continue_transport) par_reduce(0, fallback);
4681 /* Otherwise, if we are running in the test harness, wait a bit, to let the
4682 newly created process get going before we create another process. This should
4683 ensure repeatability in the tests. We only need to wait a tad. */
4685 else if (running_in_test_harness) millisleep(500);
4690 if (serialize_key) enq_end(serialize_key);
4692 remote_post_process(addr, LOG_MAIN|LOG_PANIC, panicmsg, fallback);
4696 /* Reached the end of the list of addresses. Wait for all the subprocesses that
4697 are still running and post-process their addresses. */
4699 par_reduce(0, fallback);
4706 /*************************************************
4707 * Split an address into local part and domain *
4708 *************************************************/
4710 /* This function initializes an address for routing by splitting it up into a
4711 local part and a domain. The local part is set up twice - once in its original
4712 casing, and once in lower case, and it is dequoted. We also do the "percent
4713 hack" for configured domains. This may lead to a DEFER result if a lookup
4714 defers. When a percent-hacking takes place, we insert a copy of the original
4715 address as a new parent of this address, as if we have had a redirection.
4718 addr points to an addr_item block containing the address
4721 DEFER - could not determine if domain is %-hackable
4725 deliver_split_address(address_item *addr)
4727 uschar *address = addr->address;
4728 uschar *domain = Ustrrchr(address, '@');
4730 int len = domain - address;
4732 addr->domain = string_copylc(domain+1); /* Domains are always caseless */
4734 /* The implication in the RFCs (though I can't say I've seen it spelled out
4735 explicitly) is that quoting should be removed from local parts at the point
4736 where they are locally interpreted. [The new draft "821" is more explicit on
4737 this, Jan 1999.] We know the syntax is valid, so this can be done by simply
4738 removing quoting backslashes and any unquoted doublequotes. */
4740 t = addr->cc_local_part = store_get(len+1);
4743 register int c = *address++;
4744 if (c == '\"') continue;
4754 /* We do the percent hack only for those domains that are listed in
4755 percent_hack_domains. A loop is required, to copy with multiple %-hacks. */
4757 if (percent_hack_domains)
4760 uschar *new_address = NULL;
4761 uschar *local_part = addr->cc_local_part;
4763 deliver_domain = addr->domain; /* set $domain */
4765 while ( (rc = match_isinlist(deliver_domain, (const uschar **)&percent_hack_domains, 0,
4766 &domainlist_anchor, addr->domain_cache, MCL_DOMAIN, TRUE, NULL))
4768 && (t = Ustrrchr(local_part, '%')) != NULL
4771 new_address = string_copy(local_part);
4772 new_address[t - local_part] = '@';
4773 deliver_domain = string_copylc(t+1);
4774 local_part = string_copyn(local_part, t - local_part);
4777 if (rc == DEFER) return DEFER; /* lookup deferred */
4779 /* If hackery happened, set up new parent and alter the current address. */
4783 address_item *new_parent = store_get(sizeof(address_item));
4784 *new_parent = *addr;
4785 addr->parent = new_parent;
4786 addr->address = new_address;
4787 addr->unique = string_copy(new_address);
4788 addr->domain = deliver_domain;
4789 addr->cc_local_part = local_part;
4790 DEBUG(D_deliver) debug_printf("%%-hack changed address to: %s\n",
4795 /* Create the lowercased version of the final local part, and make that the
4796 default one to be used. */
4798 addr->local_part = addr->lc_local_part = string_copylc(addr->cc_local_part);
4805 /*************************************************
4806 * Get next error message text *
4807 *************************************************/
4809 /* If f is not NULL, read the next "paragraph", from a customized error message
4810 text file, terminated by a line containing ****, and expand it.
4813 f NULL or a file to read from
4814 which string indicating which string (for errors)
4816 Returns: NULL or an expanded string
4820 next_emf(FILE *f, uschar *which)
4824 uschar *para, *yield;
4827 if (!f) return NULL;
4829 if (!Ufgets(buffer, sizeof(buffer), f) || Ustrcmp(buffer, "****\n") == 0)
4832 para = store_get(size);
4835 para = string_cat(para, &size, &ptr, buffer, Ustrlen(buffer));
4836 if (!Ufgets(buffer, sizeof(buffer), f) || Ustrcmp(buffer, "****\n") == 0)
4841 if ((yield = expand_string(para)))
4844 log_write(0, LOG_MAIN|LOG_PANIC, "Failed to expand string from "
4845 "bounce_message_file or warn_message_file (%s): %s", which,
4846 expand_string_message);
4853 /*************************************************
4854 * Close down a passed transport channel *
4855 *************************************************/
4857 /* This function is called when a passed transport channel cannot be used.
4858 It attempts to close it down tidily. The yield is always DELIVER_NOT_ATTEMPTED
4859 so that the function call can be the argument of a "return" statement.
4862 Returns: DELIVER_NOT_ATTEMPTED
4866 continue_closedown(void)
4868 if (continue_transport)
4870 transport_instance *t;
4871 for (t = transports; t; t = t->next)
4872 if (Ustrcmp(t->name, continue_transport) == 0)
4874 if (t->info->closedown) (t->info->closedown)(t);
4878 return DELIVER_NOT_ATTEMPTED;
4884 /*************************************************
4885 * Print address information *
4886 *************************************************/
4888 /* This function is called to output an address, or information about an
4889 address, for bounce or defer messages. If the hide_child flag is set, all we
4890 output is the original ancestor address.
4893 addr points to the address
4894 f the FILE to print to
4895 si an initial string
4896 sc a continuation string for before "generated"
4899 Returns: TRUE if the address is not hidden
4903 print_address_information(address_item *addr, FILE *f, uschar *si, uschar *sc,
4907 uschar *printed = US"";
4908 address_item *ancestor = addr;
4909 while (ancestor->parent) ancestor = ancestor->parent;
4911 fprintf(f, "%s", CS si);
4913 if (addr->parent && testflag(addr, af_hide_child))
4915 printed = US"an undisclosed address";
4918 else if (!testflag(addr, af_pfr) || !addr->parent)
4919 printed = addr->address;
4923 uschar *s = addr->address;
4926 if (addr->address[0] == '>') { ss = US"mail"; s++; }
4927 else if (addr->address[0] == '|') ss = US"pipe";
4930 fprintf(f, "%s to %s%sgenerated by ", ss, s, sc);
4931 printed = addr->parent->address;
4934 fprintf(f, "%s", CS string_printing(printed));
4936 if (ancestor != addr)
4938 uschar *original = ancestor->onetime_parent;
4939 if (!original) original= ancestor->address;
4940 if (strcmpic(original, printed) != 0)
4941 fprintf(f, "%s(%sgenerated from %s)", sc,
4942 ancestor != addr->parent ? "ultimately " : "",
4943 string_printing(original));
4946 if (addr->host_used)
4947 fprintf(f, "\n host %s [%s]",
4948 addr->host_used->name, addr->host_used->address);
4950 fprintf(f, "%s", CS se);
4958 /*************************************************
4959 * Print error for an address *
4960 *************************************************/
4962 /* This function is called to print the error information out of an address for
4963 a bounce or a warning message. It tries to format the message reasonably by
4964 introducing newlines. All lines are indented by 4; the initial printing
4965 position must be set before calling.
4967 This function used always to print the error. Nowadays we want to restrict it
4968 to cases such as LMTP/SMTP errors from a remote host, and errors from :fail:
4969 and filter "fail". We no longer pass other information willy-nilly in bounce
4970 and warning messages. Text in user_message is always output; text in message
4971 only if the af_pass_message flag is set.
4975 f the FILE to print on
4982 print_address_error(address_item *addr, FILE *f, uschar *t)
4984 int count = Ustrlen(t);
4985 uschar *s = testflag(addr, af_pass_message)? addr->message : NULL;
4987 if (!s && !(s = addr->user_message))
4990 fprintf(f, "\n %s", t);
4993 if (*s == '\\' && s[1] == 'n')
5003 if (*s++ == ':' && isspace(*s) && count > 45)
5005 fprintf(f, "\n "); /* sic (because space follows) */
5012 /***********************************************************
5013 * Print Diagnostic-Code for an address *
5014 ************************************************************/
5016 /* This function is called to print the error information out of an address for
5017 a bounce or a warning message. It tries to format the message reasonably as
5018 required by RFC 3461 by adding a space after each newline
5020 it uses the same logic as print_address_error() above. if af_pass_message is true
5021 and addr->message is set it uses the remote host answer. if not addr->user_message
5022 is used instead if available.
5026 f the FILE to print on
5032 print_dsn_diagnostic_code(const address_item *addr, FILE *f)
5034 uschar *s = testflag(addr, af_pass_message) ? addr->message : NULL;
5036 /* af_pass_message and addr->message set ? print remote host answer */
5040 debug_printf("DSN Diagnostic-Code: addr->message = %s\n", addr->message);
5042 /* search first ": ". we assume to find the remote-MTA answer there */
5043 if (!(s = Ustrstr(addr->message, ": ")))
5044 return; /* not found, bail out */
5045 s += 2; /* skip ": " */
5046 fprintf(f, "Diagnostic-Code: smtp; ");
5048 /* no message available. do nothing */
5052 if (*s == '\\' && s[1] == 'n')
5054 fputs("\n ", f); /* as defined in RFC 3461 */
5064 /*************************************************
5065 * Check list of addresses for duplication *
5066 *************************************************/
5068 /* This function was introduced when the test for duplicate addresses that are
5069 not pipes, files, or autoreplies was moved from the middle of routing to when
5070 routing was complete. That was to fix obscure cases when the routing history
5071 affects the subsequent routing of identical addresses. This function is called
5072 after routing, to check that the final routed addresses are not duplicates.
5074 If we detect a duplicate, we remember what it is a duplicate of. Note that
5075 pipe, file, and autoreply de-duplication is handled during routing, so we must
5076 leave such "addresses" alone here, as otherwise they will incorrectly be
5079 Argument: address of list anchor
5084 do_duplicate_check(address_item **anchor)
5087 while ((addr = *anchor))
5090 if (testflag(addr, af_pfr))
5092 anchor = &(addr->next);
5094 else if ((tnode = tree_search(tree_duplicates, addr->unique)))
5096 DEBUG(D_deliver|D_route)
5097 debug_printf("%s is a duplicate address: discarded\n", addr->unique);
5098 *anchor = addr->next;
5099 addr->dupof = tnode->data.ptr;
5100 addr->next = addr_duplicate;
5101 addr_duplicate = addr;
5105 tree_add_duplicate(addr->unique, addr);
5106 anchor = &(addr->next);
5114 /*************************************************
5115 * Deliver one message *
5116 *************************************************/
5118 /* This is the function which is called when a message is to be delivered. It
5119 is passed the id of the message. It is possible that the message no longer
5120 exists, if some other process has delivered it, and it is also possible that
5121 the message is being worked on by another process, in which case the data file
5124 If no delivery is attempted for any of the above reasons, the function returns
5125 DELIVER_NOT_ATTEMPTED.
5127 If the give_up flag is set true, do not attempt any deliveries, but instead
5128 fail all outstanding addresses and return the message to the sender (or
5131 A delivery operation has a process all to itself; we never deliver more than
5132 one message in the same process. Therefore we needn't worry too much about
5136 id the id of the message to be delivered
5137 forced TRUE if delivery was forced by an administrator; this overrides
5138 retry delays and causes a delivery to be tried regardless
5139 give_up TRUE if an administrator has requested that delivery attempts
5142 Returns: When the global variable mua_wrapper is FALSE:
5143 DELIVER_ATTEMPTED_NORMAL if a delivery attempt was made
5144 DELIVER_NOT_ATTEMPTED otherwise (see comment above)
5145 When the global variable mua_wrapper is TRUE:
5146 DELIVER_MUA_SUCCEEDED if delivery succeeded
5147 DELIVER_MUA_FAILED if delivery failed
5148 DELIVER_NOT_ATTEMPTED if not attempted (should not occur)
5152 deliver_message(uschar *id, BOOL forced, BOOL give_up)
5155 int final_yield = DELIVER_ATTEMPTED_NORMAL;
5156 time_t now = time(NULL);
5157 address_item *addr_last = NULL;
5158 uschar *filter_message = NULL;
5160 int process_recipients = RECIP_ACCEPT;
5163 extern int acl_where;
5165 uschar *info = queue_run_pid == (pid_t)0
5166 ? string_sprintf("delivering %s", id)
5167 : string_sprintf("delivering %s (queue run pid %d)", id, queue_run_pid);
5169 /* If the D_process_info bit is on, set_process_info() will output debugging
5170 information. If not, we want to show this initial information if D_deliver or
5171 D_queue_run is set or in verbose mode. */
5173 set_process_info("%s", info);
5175 if ( !(debug_selector & D_process_info)
5176 && (debug_selector & (D_deliver|D_queue_run|D_v))
5178 debug_printf("%s\n", info);
5180 /* Ensure that we catch any subprocesses that are created. Although Exim
5181 sets SIG_DFL as its initial default, some routes through the code end up
5182 here with it set to SIG_IGN - cases where a non-synchronous delivery process
5183 has been forked, but no re-exec has been done. We use sigaction rather than
5184 plain signal() on those OS where SA_NOCLDWAIT exists, because we want to be
5185 sure it is turned off. (There was a problem on AIX with this.) */
5189 struct sigaction act;
5190 act.sa_handler = SIG_DFL;
5191 sigemptyset(&(act.sa_mask));
5193 sigaction(SIGCHLD, &act, NULL);
5196 signal(SIGCHLD, SIG_DFL);
5199 /* Make the forcing flag available for routers and transports, set up the
5200 global message id field, and initialize the count for returned files and the
5201 message size. This use of strcpy() is OK because the length id is checked when
5202 it is obtained from a command line (the -M or -q options), and otherwise it is
5203 known to be a valid message id. */
5205 Ustrcpy(message_id, id);
5206 deliver_force = forced;
5210 /* Initialize some flags */
5212 update_spool = FALSE;
5213 remove_journal = TRUE;
5215 /* Set a known context for any ACLs we call via expansions */
5216 acl_where = ACL_WHERE_DELIVERY;
5218 /* Reset the random number generator, so that if several delivery processes are
5219 started from a queue runner that has already used random numbers (for sorting),
5220 they don't all get the same sequence. */
5224 /* Open and lock the message's data file. Exim locks on this one because the
5225 header file may get replaced as it is re-written during the delivery process.
5226 Any failures cause messages to be written to the log, except for missing files
5227 while queue running - another process probably completed delivery. As part of
5228 opening the data file, message_subdir gets set. */
5230 if (!spool_open_datafile(id))
5231 return continue_closedown(); /* yields DELIVER_NOT_ATTEMPTED */
5233 /* The value of message_size at this point has been set to the data length,
5234 plus one for the blank line that notionally precedes the data. */
5236 /* Now read the contents of the header file, which will set up the headers in
5237 store, and also the list of recipients and the tree of non-recipients and
5238 assorted flags. It updates message_size. If there is a reading or format error,
5239 give up; if the message has been around for sufficiently long, remove it. */
5241 sprintf(CS spoolname, "%s-H", id);
5242 if ((rc = spool_read_header(spoolname, TRUE, TRUE)) != spool_read_OK)
5244 if (errno == ERRNO_SPOOLFORMAT)
5246 struct stat statbuf;
5247 sprintf(CS big_buffer, "%s/input/%s/%s", spool_directory, message_subdir,
5249 if (Ustat(big_buffer, &statbuf) == 0)
5250 log_write(0, LOG_MAIN, "Format error in spool file %s: "
5251 "size=" OFF_T_FMT, spoolname, statbuf.st_size);
5252 else log_write(0, LOG_MAIN, "Format error in spool file %s", spoolname);
5255 log_write(0, LOG_MAIN, "Error reading spool file %s: %s", spoolname,
5258 /* If we managed to read the envelope data, received_time contains the
5259 time the message was received. Otherwise, we can calculate it from the
5262 if (rc != spool_read_hdrerror)
5265 for (i = 0; i < 6; i++)
5266 received_time = received_time * BASE_62 + tab62[id[i] - '0'];
5269 /* If we've had this malformed message too long, sling it. */
5271 if (now - received_time > keep_malformed)
5273 sprintf(CS spoolname, "%s/msglog/%s/%s", spool_directory, message_subdir, id);
5275 sprintf(CS spoolname, "%s/input/%s/%s-D", spool_directory, message_subdir, id);
5277 sprintf(CS spoolname, "%s/input/%s/%s-H", spool_directory, message_subdir, id);
5279 sprintf(CS spoolname, "%s/input/%s/%s-J", spool_directory, message_subdir, id);
5281 log_write(0, LOG_MAIN, "Message removed because older than %s",
5282 readconf_printtime(keep_malformed));
5285 (void)close(deliver_datafile);
5286 deliver_datafile = -1;
5287 return continue_closedown(); /* yields DELIVER_NOT_ATTEMPTED */
5290 /* The spool header file has been read. Look to see if there is an existing
5291 journal file for this message. If there is, it means that a previous delivery
5292 attempt crashed (program or host) before it could update the spool header file.
5293 Read the list of delivered addresses from the journal and add them to the
5294 nonrecipients tree. Then update the spool file. We can leave the journal in
5295 existence, as it will get further successful deliveries added to it in this
5296 run, and it will be deleted if this function gets to its end successfully.
5297 Otherwise it might be needed again. */
5299 sprintf(CS spoolname, "%s/input/%s/%s-J", spool_directory, message_subdir, id);
5300 jread = Ufopen(spoolname, "rb");
5303 while (Ufgets(big_buffer, big_buffer_size, jread))
5305 int n = Ustrlen(big_buffer);
5306 big_buffer[n-1] = 0;
5307 tree_add_nonrecipient(big_buffer);
5308 DEBUG(D_deliver) debug_printf("Previously delivered address %s taken from "
5309 "journal file\n", big_buffer);
5311 (void)fclose(jread);
5312 /* Panic-dies on error */
5313 (void)spool_write_header(message_id, SW_DELIVERING, NULL);
5315 else if (errno != ENOENT)
5317 log_write(0, LOG_MAIN|LOG_PANIC, "attempt to open journal for reading gave: "
5318 "%s", strerror(errno));
5319 return continue_closedown(); /* yields DELIVER_NOT_ATTEMPTED */
5322 /* A null recipients list indicates some kind of disaster. */
5324 if (!recipients_list)
5326 (void)close(deliver_datafile);
5327 deliver_datafile = -1;
5328 log_write(0, LOG_MAIN, "Spool error: no recipients for %s", spoolname);
5329 return continue_closedown(); /* yields DELIVER_NOT_ATTEMPTED */
5333 /* Handle a message that is frozen. There are a number of different things that
5334 can happen, but in the default situation, unless forced, no delivery is
5339 #ifdef SUPPORT_MOVE_FROZEN_MESSAGES
5340 /* Moving to another directory removes the message from Exim's view. Other
5341 tools must be used to deal with it. Logging of this action happens in
5342 spool_move_message() and its subfunctions. */
5344 if ( move_frozen_messages
5345 && spool_move_message(id, message_subdir, US"", US"F")
5347 return continue_closedown(); /* yields DELIVER_NOT_ATTEMPTED */
5350 /* For all frozen messages (bounces or not), timeout_frozen_after sets the
5351 maximum time to keep messages that are frozen. Thaw if we reach it, with a
5352 flag causing all recipients to be failed. The time is the age of the
5353 message, not the time since freezing. */
5355 if (timeout_frozen_after > 0 && message_age >= timeout_frozen_after)
5357 log_write(0, LOG_MAIN, "cancelled by timeout_frozen_after");
5358 process_recipients = RECIP_FAIL_TIMEOUT;
5361 /* For bounce messages (and others with no sender), thaw if the error message
5362 ignore timer is exceeded. The message will be discarded if this delivery
5365 else if (sender_address[0] == 0 && message_age >= ignore_bounce_errors_after)
5367 log_write(0, LOG_MAIN, "Unfrozen by errmsg timer");
5370 /* If this is a bounce message, or there's no auto thaw, or we haven't
5371 reached the auto thaw time yet, and this delivery is not forced by an admin
5372 user, do not attempt delivery of this message. Note that forced is set for
5373 continuing messages down the same channel, in order to skip load checking and
5374 ignore hold domains, but we don't want unfreezing in that case. */
5378 if ( ( sender_address[0] == 0
5380 || now <= deliver_frozen_at + auto_thaw
5382 && ( !forced || !deliver_force_thaw
5383 || !admin_user || continue_hostname
5386 (void)close(deliver_datafile);
5387 deliver_datafile = -1;
5388 log_write(L_skip_delivery, LOG_MAIN, "Message is frozen");
5389 return continue_closedown(); /* yields DELIVER_NOT_ATTEMPTED */
5392 /* If delivery was forced (by an admin user), assume a manual thaw.
5393 Otherwise it's an auto thaw. */
5397 deliver_manual_thaw = TRUE;
5398 log_write(0, LOG_MAIN, "Unfrozen by forced delivery");
5400 else log_write(0, LOG_MAIN, "Unfrozen by auto-thaw");
5403 /* We get here if any of the rules for unfreezing have triggered. */
5405 deliver_freeze = FALSE;
5406 update_spool = TRUE;
5410 /* Open the message log file if we are using them. This records details of
5411 deliveries, deferments, and failures for the benefit of the mail administrator.
5412 The log is not used by exim itself to track the progress of a message; that is
5413 done by rewriting the header spool file. */
5420 sprintf(CS spoolname, "%s/msglog/%s/%s", spool_directory, message_subdir, id);
5421 fd = open_msglog_file(spoolname, SPOOL_MODE, &error);
5425 log_write(0, LOG_MAIN|LOG_PANIC, "Couldn't %s message log %s: %s", error,
5426 spoolname, strerror(errno));
5427 return continue_closedown(); /* yields DELIVER_NOT_ATTEMPTED */
5430 /* Make a C stream out of it. */
5432 if (!(message_log = fdopen(fd, "a")))
5434 log_write(0, LOG_MAIN|LOG_PANIC, "Couldn't fdopen message log %s: %s",
5435 spoolname, strerror(errno));
5436 return continue_closedown(); /* yields DELIVER_NOT_ATTEMPTED */
5441 /* If asked to give up on a message, log who did it, and set the action for all
5446 struct passwd *pw = getpwuid(real_uid);
5447 log_write(0, LOG_MAIN, "cancelled by %s",
5448 pw ? US pw->pw_name : string_sprintf("uid %ld", (long int)real_uid));
5449 process_recipients = RECIP_FAIL;
5452 /* Otherwise, if there are too many Received: headers, fail all recipients. */
5454 else if (received_count > received_headers_max)
5455 process_recipients = RECIP_FAIL_LOOP;
5457 /* Otherwise, if a system-wide, address-independent message filter is
5458 specified, run it now, except in the case when we are failing all recipients as
5459 a result of timeout_frozen_after. If the system filter yields "delivered", then
5460 ignore the true recipients of the message. Failure of the filter file is
5461 logged, and the delivery attempt fails. */
5463 else if (system_filter && process_recipients != RECIP_FAIL_TIMEOUT)
5468 redirect_block redirect;
5470 if (system_filter_uid_set)
5472 ugid.uid = system_filter_uid;
5473 ugid.gid = system_filter_gid;
5474 ugid.uid_set = ugid.gid_set = TRUE;
5478 ugid.uid_set = ugid.gid_set = FALSE;
5481 return_path = sender_address;
5482 enable_dollar_recipients = TRUE; /* Permit $recipients in system filter */
5483 system_filtering = TRUE;
5485 /* Any error in the filter file causes a delivery to be abandoned. */
5487 redirect.string = system_filter;
5488 redirect.isfile = TRUE;
5489 redirect.check_owner = redirect.check_group = FALSE;
5490 redirect.owners = NULL;
5491 redirect.owngroups = NULL;
5493 redirect.modemask = 0;
5495 DEBUG(D_deliver|D_filter) debug_printf("running system filter\n");
5498 &redirect, /* Where the data is */
5499 RDO_DEFER | /* Turn on all the enabling options */
5500 RDO_FAIL | /* Leave off all the disabling options */
5505 NULL, /* No :include: restriction (not used in filter) */
5506 NULL, /* No sieve vacation directory (not sieve!) */
5507 NULL, /* No sieve enotify mailto owner (not sieve!) */
5508 NULL, /* No sieve user address (not sieve!) */
5509 NULL, /* No sieve subaddress (not sieve!) */
5510 &ugid, /* uid/gid data */
5511 &addr_new, /* Where to hang generated addresses */
5512 &filter_message, /* Where to put error message */
5513 NULL, /* Don't skip syntax errors */
5514 &filtertype, /* Will always be set to FILTER_EXIM for this call */
5515 US"system filter"); /* For error messages */
5517 DEBUG(D_deliver|D_filter) debug_printf("system filter returned %d\n", rc);
5519 if (rc == FF_ERROR || rc == FF_NONEXIST)
5521 (void)close(deliver_datafile);
5522 deliver_datafile = -1;
5523 log_write(0, LOG_MAIN|LOG_PANIC, "Error in system filter: %s",
5524 string_printing(filter_message));
5525 return continue_closedown(); /* yields DELIVER_NOT_ATTEMPTED */
5528 /* Reset things. If the filter message is an empty string, which can happen
5529 for a filter "fail" or "freeze" command with no text, reset it to NULL. */
5531 system_filtering = FALSE;
5532 enable_dollar_recipients = FALSE;
5533 if (filter_message && filter_message[0] == 0) filter_message = NULL;
5535 /* Save the values of the system filter variables so that user filters
5538 memcpy(filter_sn, filter_n, sizeof(filter_sn));
5540 /* The filter can request that delivery of the original addresses be
5545 process_recipients = RECIP_DEFER;
5546 deliver_msglog("Delivery deferred by system filter\n");
5547 log_write(0, LOG_MAIN, "Delivery deferred by system filter");
5550 /* The filter can request that a message be frozen, but this does not
5551 take place if the message has been manually thawed. In that case, we must
5552 unset "delivered", which is forced by the "freeze" command to make -bF
5555 else if (rc == FF_FREEZE && !deliver_manual_thaw)
5557 deliver_freeze = TRUE;
5558 deliver_frozen_at = time(NULL);
5559 process_recipients = RECIP_DEFER;
5560 frozen_info = string_sprintf(" by the system filter%s%s",
5561 filter_message ? US": " : US"",
5562 filter_message ? filter_message : US"");
5565 /* The filter can request that a message be failed. The error message may be
5566 quite long - it is sent back to the sender in the bounce - but we don't want
5567 to fill up the log with repetitions of it. If it starts with << then the text
5568 between << and >> is written to the log, with the rest left for the bounce
5571 else if (rc == FF_FAIL)
5573 uschar *colon = US"";
5574 uschar *logmsg = US"";
5577 process_recipients = RECIP_FAIL_FILTER;
5583 if ( filter_message[0] == '<'
5584 && filter_message[1] == '<'
5585 && (logend = Ustrstr(filter_message, ">>"))
5588 logmsg = filter_message + 2;
5589 loglen = logend - logmsg;
5590 filter_message = logend + 2;
5591 if (filter_message[0] == 0) filter_message = NULL;
5595 logmsg = filter_message;
5596 loglen = Ustrlen(filter_message);
5600 log_write(0, LOG_MAIN, "cancelled by system filter%s%.*s", colon, loglen,
5604 /* Delivery can be restricted only to those recipients (if any) that the
5605 filter specified. */
5607 else if (rc == FF_DELIVERED)
5609 process_recipients = RECIP_IGNORE;
5611 log_write(0, LOG_MAIN, "original recipients ignored (system filter)");
5613 log_write(0, LOG_MAIN, "=> discarded (system filter)");
5616 /* If any new addresses were created by the filter, fake up a "parent"
5617 for them. This is necessary for pipes, etc., which are expected to have
5618 parents, and it also gives some sensible logging for others. Allow
5619 pipes, files, and autoreplies, and run them as the filter uid if set,
5620 otherwise as the current uid. */
5624 int uid = (system_filter_uid_set)? system_filter_uid : geteuid();
5625 int gid = (system_filter_gid_set)? system_filter_gid : getegid();
5627 /* The text "system-filter" is tested in transport_set_up_command() and in
5628 set_up_shell_command() in the pipe transport, to enable them to permit
5629 $recipients, so don't change it here without also changing it there. */
5631 address_item *p = addr_new;
5632 address_item *parent = deliver_make_addr(US"system-filter", FALSE);
5634 parent->domain = string_copylc(qualify_domain_recipient);
5635 parent->local_part = US"system-filter";
5637 /* As part of this loop, we arrange for addr_last to end up pointing
5638 at the final address. This is used if we go on to add addresses for the
5639 original recipients. */
5643 if (parent->child_count == SHRT_MAX)
5644 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "system filter generated more "
5645 "than %d delivery addresses", SHRT_MAX);
5646 parent->child_count++;
5649 if (testflag(p, af_pfr))
5655 setflag(p, af_uid_set |
5661 /* Find the name of the system filter's appropriate pfr transport */
5663 if (p->address[0] == '|')
5666 tpname = system_filter_pipe_transport;
5667 address_pipe = p->address;
5669 else if (p->address[0] == '>')
5672 tpname = system_filter_reply_transport;
5676 if (p->address[Ustrlen(p->address)-1] == '/')
5678 type = US"directory";
5679 tpname = system_filter_directory_transport;
5684 tpname = system_filter_file_transport;
5686 address_file = p->address;
5689 /* Now find the actual transport, first expanding the name. We have
5690 set address_file or address_pipe above. */
5694 uschar *tmp = expand_string(tpname);
5695 address_file = address_pipe = NULL;
5697 p->message = string_sprintf("failed to expand \"%s\" as a "
5698 "system filter transport name", tpname);
5703 p->message = string_sprintf("system_filter_%s_transport is unset",
5709 transport_instance *tp;
5710 for (tp = transports; tp; tp = tp->next)
5712 if (Ustrcmp(tp->name, tpname) == 0)
5719 p->message = string_sprintf("failed to find \"%s\" transport "
5720 "for system filter delivery", tpname);
5723 /* If we couldn't set up a transport, defer the delivery, putting the
5724 error on the panic log as well as the main log. */
5728 address_item *badp = p;
5730 if (!addr_last) addr_new = p; else addr_last->next = p;
5731 badp->local_part = badp->address; /* Needed for log line */
5732 post_process_one(badp, DEFER, LOG_MAIN|LOG_PANIC, DTYPE_ROUTER, 0);
5735 } /* End of pfr handling */
5737 /* Either a non-pfr delivery, or we found a transport */
5739 DEBUG(D_deliver|D_filter)
5740 debug_printf("system filter added %s\n", p->address);
5744 } /* Loop through all addr_new addresses */
5749 /* Scan the recipients list, and for every one that is not in the non-
5750 recipients tree, add an addr item to the chain of new addresses. If the pno
5751 value is non-negative, we must set the onetime parent from it. This which
5752 points to the relevant entry in the recipients list.
5754 This processing can be altered by the setting of the process_recipients
5755 variable, which is changed if recipients are to be ignored, failed, or
5756 deferred. This can happen as a result of system filter activity, or if the -Mg
5757 option is used to fail all of them.
5759 Duplicate addresses are handled later by a different tree structure; we can't
5760 just extend the non-recipients tree, because that will be re-written to the
5761 spool if the message is deferred, and in any case there are casing
5762 complications for local addresses. */
5764 if (process_recipients != RECIP_IGNORE)
5766 for (i = 0; i < recipients_count; i++)
5768 if (!tree_search(tree_nonrecipients, recipients_list[i].address))
5770 recipient_item *r = recipients_list + i;
5771 address_item *new = deliver_make_addr(r->address, FALSE);
5772 new->prop.errors_address = r->errors_to;
5774 if ((new->prop.utf8_msg = message_smtputf8))
5776 new->prop.utf8_downcvt = message_utf8_downconvert == 1;
5777 new->prop.utf8_downcvt_maybe = message_utf8_downconvert == -1;
5778 DEBUG(D_deliver) debug_printf("utf8, downconvert %s\n",
5779 new->prop.utf8_downcvt ? "yes"
5780 : new->prop.utf8_downcvt_maybe ? "ifneeded"
5786 new->onetime_parent = recipients_list[r->pno].address;
5788 /* If DSN support is enabled, set the dsn flags and the original receipt
5789 to be passed on to other DSN enabled MTAs */
5790 new->dsn_flags = r->dsn_flags & rf_dsnflags;
5791 new->dsn_orcpt = r->orcpt;
5792 DEBUG(D_deliver) debug_printf("DSN: set orcpt: %s flags: %d\n",
5793 new->dsn_orcpt, new->dsn_flags);
5795 switch (process_recipients)
5797 /* RECIP_DEFER is set when a system filter freezes a message. */
5800 new->next = addr_defer;
5805 /* RECIP_FAIL_FILTER is set when a system filter has obeyed a "fail"
5808 case RECIP_FAIL_FILTER:
5810 filter_message ? filter_message : US"delivery cancelled";
5811 setflag(new, af_pass_message);
5812 goto RECIP_QUEUE_FAILED; /* below */
5815 /* RECIP_FAIL_TIMEOUT is set when a message is frozen, but is older
5816 than the value in timeout_frozen_after. Treat non-bounce messages
5817 similarly to -Mg; for bounce messages we just want to discard, so
5818 don't put the address on the failed list. The timeout has already
5821 case RECIP_FAIL_TIMEOUT:
5822 new->message = US"delivery cancelled; message timed out";
5823 goto RECIP_QUEUE_FAILED; /* below */
5826 /* RECIP_FAIL is set when -Mg has been used. */
5829 new->message = US"delivery cancelled by administrator";
5832 /* Common code for the failure cases above. If this is not a bounce
5833 message, put the address on the failed list so that it is used to
5834 create a bounce. Otherwise do nothing - this just discards the address.
5835 The incident has already been logged. */
5838 if (sender_address[0] != 0)
5840 new->next = addr_failed;
5846 /* RECIP_FAIL_LOOP is set when there are too many Received: headers
5847 in the message. Process each address as a routing failure; if this
5848 is a bounce message, it will get frozen. */
5850 case RECIP_FAIL_LOOP:
5851 new->message = US"Too many \"Received\" headers - suspected mail loop";
5852 post_process_one(new, FAIL, LOG_MAIN, DTYPE_ROUTER, 0);
5856 /* Value should be RECIP_ACCEPT; take this as the safe default. */
5859 if (!addr_new) addr_new = new; else addr_last->next = new;
5864 #ifndef DISABLE_EVENT
5865 if (process_recipients != RECIP_ACCEPT)
5867 uschar * save_local = deliver_localpart;
5868 const uschar * save_domain = deliver_domain;
5870 deliver_localpart = expand_string(
5871 string_sprintf("${local_part:%s}", new->address));
5872 deliver_domain = expand_string(
5873 string_sprintf("${domain:%s}", new->address));
5875 (void) event_raise(event_action,
5876 US"msg:fail:internal", new->message);
5878 deliver_localpart = save_local;
5879 deliver_domain = save_domain;
5889 debug_printf("Delivery address list:\n");
5890 for (p = addr_new; p; p = p->next)
5891 debug_printf(" %s %s\n", p->address,
5892 p->onetime_parent ? p->onetime_parent : US"");
5895 /* Set up the buffers used for copying over the file when delivering. */
5897 deliver_in_buffer = store_malloc(DELIVER_IN_BUFFER_SIZE);
5898 deliver_out_buffer = store_malloc(DELIVER_OUT_BUFFER_SIZE);
5902 /* Until there are no more new addresses, handle each one as follows:
5904 . If this is a generated address (indicated by the presence of a parent
5905 pointer) then check to see whether it is a pipe, file, or autoreply, and
5906 if so, handle it directly here. The router that produced the address will
5907 have set the allow flags into the address, and also set the uid/gid required.
5908 Having the routers generate new addresses and then checking them here at
5909 the outer level is tidier than making each router do the checking, and
5910 means that routers don't need access to the failed address queue.
5912 . Break up the address into local part and domain, and make lowercased
5913 versions of these strings. We also make unquoted versions of the local part.
5915 . Handle the percent hack for those domains for which it is valid.
5917 . For child addresses, determine if any of the parents have the same address.
5918 If so, generate a different string for previous delivery checking. Without
5919 this code, if the address spqr generates spqr via a forward or alias file,
5920 delivery of the generated spqr stops further attempts at the top level spqr,
5921 which is not what is wanted - it may have generated other addresses.
5923 . Check on the retry database to see if routing was previously deferred, but
5924 only if in a queue run. Addresses that are to be routed are put on the
5925 addr_route chain. Addresses that are to be deferred are put on the
5926 addr_defer chain. We do all the checking first, so as not to keep the
5927 retry database open any longer than necessary.
5929 . Now we run the addresses through the routers. A router may put the address
5930 on either the addr_local or the addr_remote chain for local or remote
5931 delivery, respectively, or put it on the addr_failed chain if it is
5932 undeliveable, or it may generate child addresses and put them on the
5933 addr_new chain, or it may defer an address. All the chain anchors are
5934 passed as arguments so that the routers can be called for verification
5937 . If new addresses have been generated by the routers, da capo.
5940 header_rewritten = FALSE; /* No headers rewritten yet */
5941 while (addr_new) /* Loop until all addresses dealt with */
5943 address_item *addr, *parent;
5945 /* Failure to open the retry database is treated the same as if it does
5946 not exist. In both cases, dbm_file is NULL. */
5948 if (!(dbm_file = dbfn_open(US"retry", O_RDONLY, &dbblock, FALSE)))
5950 DEBUG(D_deliver|D_retry|D_route|D_hints_lookup)
5951 debug_printf("no retry data available\n");
5954 /* Scan the current batch of new addresses, to handle pipes, files and
5955 autoreplies, and determine which others are ready for routing. */
5962 dbdata_retry *domain_retry_record;
5963 dbdata_retry *address_retry_record;
5966 addr_new = addr->next;
5968 DEBUG(D_deliver|D_retry|D_route)
5970 debug_printf(">>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>\n");
5971 debug_printf("Considering: %s\n", addr->address);
5974 /* Handle generated address that is a pipe or a file or an autoreply. */
5976 if (testflag(addr, af_pfr))
5978 /* If an autoreply in a filter could not generate a syntactically valid
5979 address, give up forthwith. Set af_ignore_error so that we don't try to
5980 generate a bounce. */
5982 if (testflag(addr, af_bad_reply))
5984 addr->basic_errno = ERRNO_BADADDRESS2;
5985 addr->local_part = addr->address;
5987 US"filter autoreply generated syntactically invalid recipient";
5988 setflag(addr, af_ignore_error);
5989 (void)post_process_one(addr, FAIL, LOG_MAIN, DTYPE_ROUTER, 0);
5990 continue; /* with the next new address */
5993 /* If two different users specify delivery to the same pipe or file or
5994 autoreply, there should be two different deliveries, so build a unique
5995 string that incorporates the original address, and use this for
5996 duplicate testing and recording delivery, and also for retrying. */
5999 string_sprintf("%s:%s", addr->address, addr->parent->unique +
6000 (testflag(addr->parent, af_homonym)? 3:0));
6002 addr->address_retry_key = addr->domain_retry_key =
6003 string_sprintf("T:%s", addr->unique);
6005 /* If a filter file specifies two deliveries to the same pipe or file,
6006 we want to de-duplicate, but this is probably not wanted for two mail
6007 commands to the same address, where probably both should be delivered.
6008 So, we have to invent a different unique string in that case. Just
6009 keep piling '>' characters on the front. */
6011 if (addr->address[0] == '>')
6013 while (tree_search(tree_duplicates, addr->unique))
6014 addr->unique = string_sprintf(">%s", addr->unique);
6017 else if ((tnode = tree_search(tree_duplicates, addr->unique)))
6019 DEBUG(D_deliver|D_route)
6020 debug_printf("%s is a duplicate address: discarded\n", addr->address);
6021 addr->dupof = tnode->data.ptr;
6022 addr->next = addr_duplicate;
6023 addr_duplicate = addr;
6027 DEBUG(D_deliver|D_route) debug_printf("unique = %s\n", addr->unique);
6029 /* Check for previous delivery */
6031 if (tree_search(tree_nonrecipients, addr->unique))
6033 DEBUG(D_deliver|D_route)
6034 debug_printf("%s was previously delivered: discarded\n", addr->address);
6035 child_done(addr, tod_stamp(tod_log));
6039 /* Save for checking future duplicates */
6041 tree_add_duplicate(addr->unique, addr);
6043 /* Set local part and domain */
6045 addr->local_part = addr->address;
6046 addr->domain = addr->parent->domain;
6048 /* Ensure that the delivery is permitted. */
6050 if (testflag(addr, af_file))
6052 if (!testflag(addr, af_allow_file))
6054 addr->basic_errno = ERRNO_FORBIDFILE;
6055 addr->message = US"delivery to file forbidden";
6056 (void)post_process_one(addr, FAIL, LOG_MAIN, DTYPE_ROUTER, 0);
6057 continue; /* with the next new address */
6060 else if (addr->address[0] == '|')
6062 if (!testflag(addr, af_allow_pipe))
6064 addr->basic_errno = ERRNO_FORBIDPIPE;
6065 addr->message = US"delivery to pipe forbidden";
6066 (void)post_process_one(addr, FAIL, LOG_MAIN, DTYPE_ROUTER, 0);
6067 continue; /* with the next new address */
6070 else if (!testflag(addr, af_allow_reply))
6072 addr->basic_errno = ERRNO_FORBIDREPLY;
6073 addr->message = US"autoreply forbidden";
6074 (void)post_process_one(addr, FAIL, LOG_MAIN, DTYPE_ROUTER, 0);
6075 continue; /* with the next new address */
6078 /* If the errno field is already set to BADTRANSPORT, it indicates
6079 failure to expand a transport string, or find the associated transport,
6080 or an unset transport when one is required. Leave this test till now so
6081 that the forbid errors are given in preference. */
6083 if (addr->basic_errno == ERRNO_BADTRANSPORT)
6085 (void)post_process_one(addr, DEFER, LOG_MAIN, DTYPE_ROUTER, 0);
6089 /* Treat /dev/null as a special case and abandon the delivery. This
6090 avoids having to specify a uid on the transport just for this case.
6091 Arrange for the transport name to be logged as "**bypassed**". */
6093 if (Ustrcmp(addr->address, "/dev/null") == 0)
6095 uschar *save = addr->transport->name;
6096 addr->transport->name = US"**bypassed**";
6097 (void)post_process_one(addr, OK, LOG_MAIN, DTYPE_TRANSPORT, '=');
6098 addr->transport->name = save;
6099 continue; /* with the next new address */
6102 /* Pipe, file, or autoreply delivery is to go ahead as a normal local
6105 DEBUG(D_deliver|D_route)
6106 debug_printf("queued for %s transport\n", addr->transport->name);
6107 addr->next = addr_local;
6109 continue; /* with the next new address */
6112 /* Handle normal addresses. First, split up into local part and domain,
6113 handling the %-hack if necessary. There is the possibility of a defer from
6114 a lookup in percent_hack_domains. */
6116 if ((rc = deliver_split_address(addr)) == DEFER)
6118 addr->message = US"cannot check percent_hack_domains";
6119 addr->basic_errno = ERRNO_LISTDEFER;
6120 (void)post_process_one(addr, DEFER, LOG_MAIN, DTYPE_NONE, 0);
6124 /* Check to see if the domain is held. If so, proceed only if the
6125 delivery was forced by hand. */
6127 deliver_domain = addr->domain; /* set $domain */
6128 if ( !forced && hold_domains
6129 && (rc = match_isinlist(addr->domain, (const uschar **)&hold_domains, 0,
6130 &domainlist_anchor, addr->domain_cache, MCL_DOMAIN, TRUE,
6136 addr->message = US"hold_domains lookup deferred";
6137 addr->basic_errno = ERRNO_LISTDEFER;
6141 addr->message = US"domain is held";
6142 addr->basic_errno = ERRNO_HELD;
6144 (void)post_process_one(addr, DEFER, LOG_MAIN, DTYPE_NONE, 0);
6148 /* Now we can check for duplicates and previously delivered addresses. In
6149 order to do this, we have to generate a "unique" value for each address,
6150 because there may be identical actual addresses in a line of descendents.
6151 The "unique" field is initialized to the same value as the "address" field,
6152 but gets changed here to cope with identically-named descendents. */
6154 for (parent = addr->parent; parent; parent = parent->parent)
6155 if (strcmpic(addr->address, parent->address) == 0) break;
6157 /* If there's an ancestor with the same name, set the homonym flag. This
6158 influences how deliveries are recorded. Then add a prefix on the front of
6159 the unique address. We use \n\ where n starts at 0 and increases each time.
6160 It is unlikely to pass 9, but if it does, it may look odd but will still
6161 work. This means that siblings or cousins with the same names are treated
6162 as duplicates, which is what we want. */
6166 setflag(addr, af_homonym);
6167 if (parent->unique[0] != '\\')
6168 addr->unique = string_sprintf("\\0\\%s", addr->address);
6170 addr->unique = string_sprintf("\\%c\\%s", parent->unique[1] + 1,
6174 /* Ensure that the domain in the unique field is lower cased, because
6175 domains are always handled caselessly. */
6177 p = Ustrrchr(addr->unique, '@');
6178 while (*p != 0) { *p = tolower(*p); p++; }
6180 DEBUG(D_deliver|D_route) debug_printf("unique = %s\n", addr->unique);
6182 if (tree_search(tree_nonrecipients, addr->unique))
6184 DEBUG(D_deliver|D_route)
6185 debug_printf("%s was previously delivered: discarded\n", addr->unique);
6186 child_done(addr, tod_stamp(tod_log));
6190 /* Get the routing retry status, saving the two retry keys (with and
6191 without the local part) for subsequent use. If there is no retry record for
6192 the standard address routing retry key, we look for the same key with the
6193 sender attached, because this form is used by the smtp transport after a
6194 4xx response to RCPT when address_retry_include_sender is true. */
6196 addr->domain_retry_key = string_sprintf("R:%s", addr->domain);
6197 addr->address_retry_key = string_sprintf("R:%s@%s", addr->local_part,
6202 domain_retry_record = dbfn_read(dbm_file, addr->domain_retry_key);
6203 if ( domain_retry_record
6204 && now - domain_retry_record->time_stamp > retry_data_expire
6206 domain_retry_record = NULL; /* Ignore if too old */
6208 address_retry_record = dbfn_read(dbm_file, addr->address_retry_key);
6209 if ( address_retry_record
6210 && now - address_retry_record->time_stamp > retry_data_expire
6212 address_retry_record = NULL; /* Ignore if too old */
6214 if (!address_retry_record)
6216 uschar *altkey = string_sprintf("%s:<%s>", addr->address_retry_key,
6218 address_retry_record = dbfn_read(dbm_file, altkey);
6219 if ( address_retry_record
6220 && now - address_retry_record->time_stamp > retry_data_expire)
6221 address_retry_record = NULL; /* Ignore if too old */
6225 domain_retry_record = address_retry_record = NULL;
6227 DEBUG(D_deliver|D_retry)
6229 if (!domain_retry_record)
6230 debug_printf("no domain retry record\n");
6231 if (!address_retry_record)
6232 debug_printf("no address retry record\n");
6235 /* If we are sending a message down an existing SMTP connection, we must
6236 assume that the message which created the connection managed to route
6237 an address to that connection. We do not want to run the risk of taking
6238 a long time over routing here, because if we do, the server at the other
6239 end of the connection may time it out. This is especially true for messages
6240 with lots of addresses. For this kind of delivery, queue_running is not
6241 set, so we would normally route all addresses. We take a pragmatic approach
6242 and defer routing any addresses that have any kind of domain retry record.
6243 That is, we don't even look at their retry times. It doesn't matter if this
6244 doesn't work occasionally. This is all just an optimization, after all.
6246 The reason for not doing the same for address retries is that they normally
6247 arise from 4xx responses, not DNS timeouts. */
6249 if (continue_hostname && domain_retry_record)
6251 addr->message = US"reusing SMTP connection skips previous routing defer";
6252 addr->basic_errno = ERRNO_RRETRY;
6253 (void)post_process_one(addr, DEFER, LOG_MAIN, DTYPE_ROUTER, 0);
6256 /* If we are in a queue run, defer routing unless there is no retry data or
6257 we've passed the next retry time, or this message is forced. In other
6258 words, ignore retry data when not in a queue run.
6260 However, if the domain retry time has expired, always allow the routing
6261 attempt. If it fails again, the address will be failed. This ensures that
6262 each address is routed at least once, even after long-term routing
6265 If there is an address retry, check that too; just wait for the next
6266 retry time. This helps with the case when the temporary error on the
6267 address was really message-specific rather than address specific, since
6268 it allows other messages through.
6270 We also wait for the next retry time if this is a message sent down an
6271 existing SMTP connection (even though that will be forced). Otherwise there
6272 will be far too many attempts for an address that gets a 4xx error. In
6273 fact, after such an error, we should not get here because, the host should
6274 not be remembered as one this message needs. However, there was a bug that
6275 used to cause this to happen, so it is best to be on the safe side.
6277 Even if we haven't reached the retry time in the hints, there is one more
6278 check to do, which is for the ultimate address timeout. We only do this
6279 check if there is an address retry record and there is not a domain retry
6280 record; this implies that previous attempts to handle the address had the
6281 retry_use_local_parts option turned on. We use this as an approximation
6282 for the destination being like a local delivery, for example delivery over
6283 LMTP to an IMAP message store. In this situation users are liable to bump
6284 into their quota and thereby have intermittently successful deliveries,
6285 which keep the retry record fresh, which can lead to us perpetually
6286 deferring messages. */
6288 else if ( ( queue_running && !deliver_force
6289 || continue_hostname
6291 && ( ( domain_retry_record
6292 && now < domain_retry_record->next_try
6293 && !domain_retry_record->expired
6295 || ( address_retry_record
6296 && now < address_retry_record->next_try
6298 && ( domain_retry_record
6299 || !address_retry_record
6300 || !retry_ultimate_address_timeout(addr->address_retry_key,
6301 addr->domain, address_retry_record, now)
6304 addr->message = US"retry time not reached";
6305 addr->basic_errno = ERRNO_RRETRY;
6306 (void)post_process_one(addr, DEFER, LOG_MAIN, DTYPE_ROUTER, 0);
6309 /* The domain is OK for routing. Remember if retry data exists so it
6310 can be cleaned up after a successful delivery. */
6314 if (domain_retry_record || address_retry_record)
6315 setflag(addr, af_dr_retry_exists);
6316 addr->next = addr_route;
6318 DEBUG(D_deliver|D_route)
6319 debug_printf("%s: queued for routing\n", addr->address);
6323 /* The database is closed while routing is actually happening. Requests to
6324 update it are put on a chain and all processed together at the end. */
6326 if (dbm_file) dbfn_close(dbm_file);
6328 /* If queue_domains is set, we don't even want to try routing addresses in
6329 those domains. During queue runs, queue_domains is forced to be unset.
6330 Optimize by skipping this pass through the addresses if nothing is set. */
6332 if (!deliver_force && queue_domains)
6334 address_item *okaddr = NULL;
6337 address_item *addr = addr_route;
6338 addr_route = addr->next;
6340 deliver_domain = addr->domain; /* set $domain */
6341 if ((rc = match_isinlist(addr->domain, (const uschar **)&queue_domains, 0,
6342 &domainlist_anchor, addr->domain_cache, MCL_DOMAIN, TRUE, NULL))
6347 addr->basic_errno = ERRNO_LISTDEFER;
6348 addr->message = US"queue_domains lookup deferred";
6349 (void)post_process_one(addr, DEFER, LOG_MAIN, DTYPE_ROUTER, 0);
6353 addr->next = okaddr;
6359 addr->basic_errno = ERRNO_QUEUE_DOMAIN;
6360 addr->message = US"domain is in queue_domains";
6361 (void)post_process_one(addr, DEFER, LOG_MAIN, DTYPE_ROUTER, 0);
6365 addr_route = okaddr;
6368 /* Now route those addresses that are not deferred. */
6373 address_item *addr = addr_route;
6374 const uschar *old_domain = addr->domain;
6375 uschar *old_unique = addr->unique;
6376 addr_route = addr->next;
6379 /* Just in case some router parameter refers to it. */
6381 if (!(return_path = addr->prop.errors_address))
6382 return_path = sender_address;
6384 /* If a router defers an address, add a retry item. Whether or not to
6385 use the local part in the key is a property of the router. */
6387 if ((rc = route_address(addr, &addr_local, &addr_remote, &addr_new,
6388 &addr_succeed, v_none)) == DEFER)
6389 retry_add_item(addr,
6390 addr->router->retry_use_local_part
6391 ? string_sprintf("R:%s@%s", addr->local_part, addr->domain)
6392 : string_sprintf("R:%s", addr->domain),
6395 /* Otherwise, if there is an existing retry record in the database, add
6396 retry items to delete both forms. We must also allow for the possibility
6397 of a routing retry that includes the sender address. Since the domain might
6398 have been rewritten (expanded to fully qualified) as a result of routing,
6399 ensure that the rewritten form is also deleted. */
6401 else if (testflag(addr, af_dr_retry_exists))
6403 uschar *altkey = string_sprintf("%s:<%s>", addr->address_retry_key,
6405 retry_add_item(addr, altkey, rf_delete);
6406 retry_add_item(addr, addr->address_retry_key, rf_delete);
6407 retry_add_item(addr, addr->domain_retry_key, rf_delete);
6408 if (Ustrcmp(addr->domain, old_domain) != 0)
6409 retry_add_item(addr, string_sprintf("R:%s", old_domain), rf_delete);
6412 /* DISCARD is given for :blackhole: and "seen finish". The event has been
6413 logged, but we need to ensure the address (and maybe parents) is marked
6418 address_done(addr, tod_stamp(tod_log));
6419 continue; /* route next address */
6422 /* The address is finished with (failed or deferred). */
6426 (void)post_process_one(addr, rc, LOG_MAIN, DTYPE_ROUTER, 0);
6427 continue; /* route next address */
6430 /* The address has been routed. If the router changed the domain, it will
6431 also have changed the unique address. We have to test whether this address
6432 has already been delivered, because it's the unique address that finally
6435 if ( addr->unique != old_unique
6436 && tree_search(tree_nonrecipients, addr->unique) != 0
6439 DEBUG(D_deliver|D_route) debug_printf("%s was previously delivered: "
6440 "discarded\n", addr->address);
6441 if (addr_remote == addr) addr_remote = addr->next;
6442 else if (addr_local == addr) addr_local = addr->next;
6445 /* If the router has same_domain_copy_routing set, we are permitted to copy
6446 the routing for any other addresses with the same domain. This is an
6447 optimisation to save repeated DNS lookups for "standard" remote domain
6448 routing. The option is settable only on routers that generate host lists.
6449 We play it very safe, and do the optimization only if the address is routed
6450 to a remote transport, there are no header changes, and the domain was not
6451 modified by the router. */
6453 if ( addr_remote == addr
6454 && addr->router->same_domain_copy_routing
6455 && !addr->prop.extra_headers
6456 && !addr->prop.remove_headers
6457 && old_domain == addr->domain
6460 address_item **chain = &addr_route;
6463 address_item *addr2 = *chain;
6464 if (Ustrcmp(addr2->domain, addr->domain) != 0)
6466 chain = &(addr2->next);
6470 /* Found a suitable address; take it off the routing list and add it to
6471 the remote delivery list. */
6473 *chain = addr2->next;
6474 addr2->next = addr_remote;
6475 addr_remote = addr2;
6477 /* Copy the routing data */
6479 addr2->domain = addr->domain;
6480 addr2->router = addr->router;
6481 addr2->transport = addr->transport;
6482 addr2->host_list = addr->host_list;
6483 addr2->fallback_hosts = addr->fallback_hosts;
6484 addr2->prop.errors_address = addr->prop.errors_address;
6485 copyflag(addr2, addr, af_hide_child | af_local_host_removed);
6487 DEBUG(D_deliver|D_route)
6489 debug_printf(">>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>\n"
6491 "Routing for %s copied from %s\n",
6492 addr2->address, addr2->address, addr->address);
6496 } /* Continue with routing the next address. */
6497 } /* Loop to process any child addresses that the routers created, and
6498 any rerouted addresses that got put back on the new chain. */
6501 /* Debugging: show the results of the routing */
6503 DEBUG(D_deliver|D_retry|D_route)
6506 debug_printf(">>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>\n");
6507 debug_printf("After routing:\n Local deliveries:\n");
6508 for (p = addr_local; p; p = p->next)
6509 debug_printf(" %s\n", p->address);
6511 debug_printf(" Remote deliveries:\n");
6512 for (p = addr_remote; p; p = p->next)
6513 debug_printf(" %s\n", p->address);
6515 debug_printf(" Failed addresses:\n");
6516 for (p = addr_failed; p; p = p->next)
6517 debug_printf(" %s\n", p->address);
6519 debug_printf(" Deferred addresses:\n");
6520 for (p = addr_defer; p; p = p->next)
6521 debug_printf(" %s\n", p->address);
6524 /* Free any resources that were cached during routing. */
6529 /* These two variables are set only during routing, after check_local_user.
6530 Ensure they are not set in transports. */
6532 local_user_gid = (gid_t)(-1);
6533 local_user_uid = (uid_t)(-1);
6535 /* Check for any duplicate addresses. This check is delayed until after
6536 routing, because the flexibility of the routing configuration means that
6537 identical addresses with different parentage may end up being redirected to
6538 different addresses. Checking for duplicates too early (as we previously used
6539 to) makes this kind of thing not work. */
6541 do_duplicate_check(&addr_local);
6542 do_duplicate_check(&addr_remote);
6544 /* When acting as an MUA wrapper, we proceed only if all addresses route to a
6545 remote transport. The check that they all end up in one transaction happens in
6546 the do_remote_deliveries() function. */
6549 && (addr_local || addr_failed || addr_defer)
6553 uschar *which, *colon, *msg;
6560 else if (addr_defer)
6563 which = US"deferred";
6571 while (addr->parent) addr = addr->parent;
6576 msg = addr->message;
6578 else colon = msg = US"";
6580 /* We don't need to log here for a forced failure as it will already
6581 have been logged. Defer will also have been logged, but as a defer, so we do
6582 need to do the failure logging. */
6584 if (addr != addr_failed)
6585 log_write(0, LOG_MAIN, "** %s routing yielded a %s delivery",
6586 addr->address, which);
6588 /* Always write an error to the caller */
6590 fprintf(stderr, "routing %s yielded a %s delivery%s%s\n", addr->address,
6593 final_yield = DELIVER_MUA_FAILED;
6594 addr_failed = addr_defer = NULL; /* So that we remove the message */
6595 goto DELIVERY_TIDYUP;
6599 /* If this is a run to continue deliveries to an external channel that is
6600 already set up, defer any local deliveries. */
6602 if (continue_transport)
6606 address_item *addr = addr_defer;
6607 while (addr->next) addr = addr->next;
6608 addr->next = addr_local;
6611 addr_defer = addr_local;
6616 /* Because address rewriting can happen in the routers, we should not really do
6617 ANY deliveries until all addresses have been routed, so that all recipients of
6618 the message get the same headers. However, this is in practice not always
6619 possible, since sometimes remote addresses give DNS timeouts for days on end.
6620 The pragmatic approach is to deliver what we can now, saving any rewritten
6621 headers so that at least the next lot of recipients benefit from the rewriting
6622 that has already been done.
6624 If any headers have been rewritten during routing, update the spool file to
6625 remember them for all subsequent deliveries. This can be delayed till later if
6626 there is only address to be delivered - if it succeeds the spool write need not
6629 if ( header_rewritten
6631 && (addr_local->next || addr_remote)
6633 || (addr_remote && addr_remote->next)
6636 /* Panic-dies on error */
6637 (void)spool_write_header(message_id, SW_DELIVERING, NULL);
6638 header_rewritten = FALSE;
6642 /* If there are any deliveries to be done, open the journal file. This is used
6643 to record successful deliveries as soon as possible after each delivery is
6644 known to be complete. A file opened with O_APPEND is used so that several
6645 processes can run simultaneously.
6647 The journal is just insurance against crashes. When the spool file is
6648 ultimately updated at the end of processing, the journal is deleted. If a
6649 journal is found to exist at the start of delivery, the addresses listed
6650 therein are added to the non-recipients. */
6652 if (addr_local || addr_remote)
6654 sprintf(CS spoolname, "%s/input/%s/%s-J", spool_directory, message_subdir, id);
6655 journal_fd = Uopen(spoolname, O_WRONLY|O_APPEND|O_CREAT, SPOOL_MODE);
6659 log_write(0, LOG_MAIN|LOG_PANIC, "Couldn't open journal file %s: %s",
6660 spoolname, strerror(errno));
6661 return DELIVER_NOT_ATTEMPTED;
6664 /* Set the close-on-exec flag, make the file owned by Exim, and ensure
6665 that the mode is correct - the group setting doesn't always seem to get
6666 set automatically. */
6668 if( fcntl(journal_fd, F_SETFD, fcntl(journal_fd, F_GETFD) | FD_CLOEXEC)
6669 || fchown(journal_fd, exim_uid, exim_gid)
6670 || fchmod(journal_fd, SPOOL_MODE)
6673 int ret = Uunlink(spoolname);
6674 log_write(0, LOG_MAIN|LOG_PANIC, "Couldn't set perms on journal file %s: %s",
6675 spoolname, strerror(errno));
6676 if(ret && errno != ENOENT)
6677 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to unlink %s: %s",
6678 spoolname, strerror(errno));
6679 return DELIVER_NOT_ATTEMPTED;
6685 /* Now we can get down to the business of actually doing deliveries. Local
6686 deliveries are done first, then remote ones. If ever the problems of how to
6687 handle fallback transports are figured out, this section can be put into a loop
6688 for handling fallbacks, though the uid switching will have to be revised. */
6690 /* Precompile a regex that is used to recognize a parameter in response
6691 to an LHLO command, if is isn't already compiled. This may be used on both
6692 local and remote LMTP deliveries. */
6694 if (!regex_IGNOREQUOTA)
6696 regex_must_compile(US"\\n250[\\s\\-]IGNOREQUOTA(\\s|\\n|$)", FALSE, TRUE);
6698 /* Handle local deliveries */
6702 DEBUG(D_deliver|D_transport)
6703 debug_printf(">>>>>>>>>>>>>>>> Local deliveries >>>>>>>>>>>>>>>>\n");
6704 do_local_deliveries();
6705 disable_logging = FALSE;
6708 /* If queue_run_local is set, we do not want to attempt any remote deliveries,
6709 so just queue them all. */
6711 if (queue_run_local)
6714 address_item *addr = addr_remote;
6715 addr_remote = addr->next;
6717 addr->basic_errno = ERRNO_LOCAL_ONLY;
6718 addr->message = US"remote deliveries suppressed";
6719 (void)post_process_one(addr, DEFER, LOG_MAIN, DTYPE_TRANSPORT, 0);
6722 /* Handle remote deliveries */
6726 DEBUG(D_deliver|D_transport)
6727 debug_printf(">>>>>>>>>>>>>>>> Remote deliveries >>>>>>>>>>>>>>>>\n");
6729 /* Precompile some regex that are used to recognize parameters in response
6730 to an EHLO command, if they aren't already compiled. */
6734 /* Now sort the addresses if required, and do the deliveries. The yield of
6735 do_remote_deliveries is FALSE when mua_wrapper is set and all addresses
6736 cannot be delivered in one transaction. */
6738 if (remote_sort_domains) sort_remote_deliveries();
6739 if (!do_remote_deliveries(FALSE))
6741 log_write(0, LOG_MAIN, "** mua_wrapper is set but recipients cannot all "
6742 "be delivered in one transaction");
6743 fprintf(stderr, "delivery to smarthost failed (configuration problem)\n");
6745 final_yield = DELIVER_MUA_FAILED;
6746 addr_failed = addr_defer = NULL; /* So that we remove the message */
6747 goto DELIVERY_TIDYUP;
6750 /* See if any of the addresses that failed got put on the queue for delivery
6751 to their fallback hosts. We do it this way because often the same fallback
6752 host is used for many domains, so all can be sent in a single transaction
6753 (if appropriately configured). */
6755 if (addr_fallback && !mua_wrapper)
6757 DEBUG(D_deliver) debug_printf("Delivering to fallback hosts\n");
6758 addr_remote = addr_fallback;
6759 addr_fallback = NULL;
6760 if (remote_sort_domains) sort_remote_deliveries();
6761 do_remote_deliveries(TRUE);
6763 disable_logging = FALSE;
6767 /* All deliveries are now complete. Ignore SIGTERM during this tidying up
6768 phase, to minimize cases of half-done things. */
6771 debug_printf(">>>>>>>>>>>>>>>> deliveries are done >>>>>>>>>>>>>>>>\n");
6773 /* Root privilege is no longer needed */
6775 exim_setugid(exim_uid, exim_gid, FALSE, US"post-delivery tidying");
6777 set_process_info("tidying up after delivering %s", message_id);
6778 signal(SIGTERM, SIG_IGN);
6780 /* When we are acting as an MUA wrapper, the smtp transport will either have
6781 succeeded for all addresses, or failed them all in normal cases. However, there
6782 are some setup situations (e.g. when a named port does not exist) that cause an
6783 immediate exit with deferral of all addresses. Convert those into failures. We
6784 do not ever want to retry, nor do we want to send a bounce message. */
6790 address_item *addr, *nextaddr;
6791 for (addr = addr_defer; addr; addr = nextaddr)
6793 log_write(0, LOG_MAIN, "** %s mua_wrapper forced failure for deferred "
6794 "delivery", addr->address);
6795 nextaddr = addr->next;
6796 addr->next = addr_failed;
6802 /* Now all should either have succeeded or failed. */
6805 final_yield = DELIVER_MUA_SUCCEEDED;
6809 uschar *s = addr_failed->user_message;
6811 if (!s) s = addr_failed->message;
6813 fprintf(stderr, "Delivery failed: ");
6814 if (addr_failed->basic_errno > 0)
6816 fprintf(stderr, "%s", strerror(addr_failed->basic_errno));
6817 if (s) fprintf(stderr, ": ");
6819 if ((host = addr_failed->host_used))
6820 fprintf(stderr, "H=%s [%s]: ", host->name, host->address);
6822 fprintf(stderr, "%s", CS s);
6823 else if (addr_failed->basic_errno <= 0)
6824 fprintf(stderr, "unknown error");
6825 fprintf(stderr, "\n");
6827 final_yield = DELIVER_MUA_FAILED;
6832 /* In a normal configuration, we now update the retry database. This is done in
6833 one fell swoop at the end in order not to keep opening and closing (and
6834 locking) the database. The code for handling retries is hived off into a
6835 separate module for convenience. We pass it the addresses of the various
6836 chains, because deferred addresses can get moved onto the failed chain if the
6837 retry cutoff time has expired for all alternative destinations. Bypass the
6838 updating of the database if the -N flag is set, which is a debugging thing that
6839 prevents actual delivery. */
6841 else if (!dont_deliver)
6842 retry_update(&addr_defer, &addr_failed, &addr_succeed);
6844 /* Send DSN for successful messages if requested */
6845 addr_senddsn = NULL;
6847 for (addr_dsntmp = addr_succeed; addr_dsntmp; addr_dsntmp = addr_dsntmp->next)
6849 /* af_ignore_error not honored here. it's not an error */
6850 DEBUG(D_deliver) debug_printf("DSN: processing router : %s\n"
6851 "DSN: processing successful delivery address: %s\n"
6852 "DSN: Sender_address: %s\n"
6853 "DSN: orcpt: %s flags: %d\n"
6854 "DSN: envid: %s ret: %d\n"
6855 "DSN: Final recipient: %s\n"
6856 "DSN: Remote SMTP server supports DSN: %d\n",
6857 addr_dsntmp->router->name,
6858 addr_dsntmp->address,
6860 addr_dsntmp->dsn_orcpt, addr_dsntmp->dsn_flags,
6862 addr_dsntmp->address,
6863 addr_dsntmp->dsn_aware
6866 /* send report if next hop not DSN aware or a router flagged "last DSN hop"
6867 and a report was requested */
6868 if ( ( addr_dsntmp->dsn_aware != dsn_support_yes
6869 || addr_dsntmp->dsn_flags & rf_dsnlasthop
6871 && addr_dsntmp->dsn_flags & rf_dsnflags
6872 && addr_dsntmp->dsn_flags & rf_notify_success
6875 /* copy and relink address_item and send report with all of them at once later */
6876 address_item *addr_next;
6877 addr_next = addr_senddsn;
6878 addr_senddsn = store_get(sizeof(address_item));
6879 memcpy(addr_senddsn, addr_dsntmp, sizeof(address_item));
6880 addr_senddsn->next = addr_next;
6883 DEBUG(D_deliver) debug_printf("DSN: not sending DSN success message\n");
6891 /* create exim process to send message */
6892 pid = child_open_exim(&fd);
6894 DEBUG(D_deliver) debug_printf("DSN: child_open_exim returns: %d\n", pid);
6896 if (pid < 0) /* Creation of child failed */
6898 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Process %d (parent %d) failed to "
6899 "create child process to send failure message: %s", getpid(),
6900 getppid(), strerror(errno));
6902 DEBUG(D_deliver) debug_printf("DSN: child_open_exim failed\n");
6904 else /* Creation of child succeeded */
6906 FILE *f = fdopen(fd, "wb");
6907 /* header only as required by RFC. only failure DSN needs to honor RET=FULL */
6908 int topt = topt_add_return_path | topt_no_body;
6912 debug_printf("sending error message to: %s\n", sender_address);
6914 /* build unique id for MIME boundary */
6915 bound = string_sprintf(TIME_T_FMT "-eximdsn-%d", time(NULL), rand());
6916 DEBUG(D_deliver) debug_printf("DSN: MIME boundary: %s\n", bound);
6918 if (errors_reply_to)
6919 fprintf(f, "Reply-To: %s\n", errors_reply_to);
6921 fprintf(f, "Auto-Submitted: auto-generated\n"
6922 "From: Mail Delivery System <Mailer-Daemon@%s>\n"
6924 "Subject: Delivery Status Notification\n"
6925 "Content-Type: multipart/report; report-type=delivery-status; boundary=%s\n"
6926 "MIME-Version: 1.0\n\n"
6929 "Content-type: text/plain; charset=us-ascii\n\n"
6931 "This message was created automatically by mail delivery software.\n"
6932 " ----- The following addresses had successful delivery notifications -----\n",
6933 qualify_domain_sender, sender_address, bound, bound);
6935 for (addr_dsntmp = addr_senddsn; addr_dsntmp;
6936 addr_dsntmp = addr_dsntmp->next)
6937 fprintf(f, "<%s> (relayed %s)\n\n",
6938 addr_dsntmp->address,
6939 (addr_dsntmp->dsn_flags & rf_dsnlasthop) == 1
6940 ? "via non DSN router"
6941 : addr_dsntmp->dsn_aware == dsn_support_no
6942 ? "to non-DSN-aware mailer"
6943 : "via non \"Remote SMTP\" router"
6947 "Content-type: message/delivery-status\n\n"
6948 "Reporting-MTA: dns; %s\n",
6949 bound, smtp_active_hostname);
6952 { /* must be decoded from xtext: see RFC 3461:6.3a */
6954 if (auth_xtextdecode(dsn_envid, &xdec_envid) > 0)
6955 fprintf(f, "Original-Envelope-ID: %s\n", dsn_envid);
6957 fprintf(f, "X-Original-Envelope-ID: error decoding xtext formatted ENVID\n");
6961 for (addr_dsntmp = addr_senddsn;
6963 addr_dsntmp = addr_dsntmp->next)
6965 if (addr_dsntmp->dsn_orcpt)
6966 fprintf(f,"Original-Recipient: %s\n", addr_dsntmp->dsn_orcpt);
6968 fprintf(f, "Action: delivered\n"
6969 "Final-Recipient: rfc822;%s\n"
6971 addr_dsntmp->address);
6973 if (addr_dsntmp->host_used && addr_dsntmp->host_used->name)
6974 fprintf(f, "Remote-MTA: dns; %s\nDiagnostic-Code: smtp; 250 Ok\n\n",
6975 addr_dsntmp->host_used->name);
6977 fprintf(f, "Diagnostic-Code: X-Exim; relayed via non %s router\n\n",
6978 (addr_dsntmp->dsn_flags & rf_dsnlasthop) == 1 ? "DSN" : "SMTP");
6981 fprintf(f, "--%s\nContent-type: text/rfc822-headers\n\n", bound);
6984 transport_filter_argv = NULL; /* Just in case */
6985 return_path = sender_address; /* In case not previously set */
6987 /* Write the original email out */
6988 transport_write_message(NULL, fileno(f), topt, 0, NULL, NULL, NULL, NULL, NULL, 0);
6991 fprintf(f,"\n--%s--\n", bound);
6995 rc = child_close(pid, 0); /* Waits for child to close, no timeout */
6999 /* If any addresses failed, we must send a message to somebody, unless
7000 af_ignore_error is set, in which case no action is taken. It is possible for
7001 several messages to get sent if there are addresses with different
7008 uschar *logtod = tod_stamp(tod_log);
7010 address_item *handled_addr = NULL;
7011 address_item **paddr;
7012 address_item *msgchain = NULL;
7013 address_item **pmsgchain = &msgchain;
7015 /* There are weird cases when logging is disabled in the transport. However,
7016 there may not be a transport (address failed by a router). */
7018 disable_logging = FALSE;
7019 if (addr_failed->transport)
7020 disable_logging = addr_failed->transport->disable_logging;
7023 debug_printf("processing failed address %s\n", addr_failed->address);
7025 /* There are only two ways an address in a bounce message can get here:
7027 (1) When delivery was initially deferred, but has now timed out (in the call
7028 to retry_update() above). We can detect this by testing for
7029 af_retry_timedout. If the address does not have its own errors address,
7030 we arrange to ignore the error.
7032 (2) If delivery failures for bounce messages are being ignored. We can detect
7033 this by testing for af_ignore_error. This will also be set if a bounce
7034 message has been autothawed and the ignore_bounce_errors_after time has
7035 passed. It might also be set if a router was explicitly configured to
7036 ignore errors (errors_to = "").
7038 If neither of these cases obtains, something has gone wrong. Log the
7039 incident, but then ignore the error. */
7041 if (sender_address[0] == 0 && !addr_failed->prop.errors_address)
7043 if ( !testflag(addr_failed, af_retry_timedout)
7044 && !testflag(addr_failed, af_ignore_error))
7046 log_write(0, LOG_MAIN|LOG_PANIC, "internal error: bounce message "
7047 "failure is neither frozen nor ignored (it's been ignored)");
7049 setflag(addr_failed, af_ignore_error);
7052 /* If the first address on the list has af_ignore_error set, just remove
7053 it from the list, throw away any saved message file, log it, and
7054 mark the recipient done. */
7056 if ( testflag(addr_failed, af_ignore_error)
7057 || ( addr_failed->dsn_flags & rf_dsnflags
7058 && (addr_failed->dsn_flags & rf_notify_failure) != rf_notify_failure
7062 addr_failed = addr->next;
7063 if (addr->return_filename) Uunlink(addr->return_filename);
7065 log_write(0, LOG_MAIN, "%s%s%s%s: error ignored",
7067 !addr->parent ? US"" : US" <",
7068 !addr->parent ? US"" : addr->parent->address,
7069 !addr->parent ? US"" : US">");
7071 address_done(addr, logtod);
7072 child_done(addr, logtod);
7073 /* Panic-dies on error */
7074 (void)spool_write_header(message_id, SW_DELIVERING, NULL);
7077 /* Otherwise, handle the sending of a message. Find the error address for
7078 the first address, then send a message that includes all failed addresses
7079 that have the same error address. Note the bounce_recipient is a global so
7080 that it can be accesssed by $bounce_recipient while creating a customized
7085 if (!(bounce_recipient = addr_failed->prop.errors_address))
7086 bounce_recipient = sender_address;
7088 /* Make a subprocess to send a message */
7090 if ((pid = child_open_exim(&fd)) < 0)
7091 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Process %d (parent %d) failed to "
7092 "create child process to send failure message: %s", getpid(),
7093 getppid(), strerror(errno));
7095 /* Creation of child succeeded */
7102 uschar *bcc, *emf_text;
7103 FILE *f = fdopen(fd, "wb");
7105 BOOL to_sender = strcmpic(sender_address, bounce_recipient) == 0;
7106 int max = (bounce_return_size_limit/DELIVER_IN_BUFFER_SIZE + 1) *
7107 DELIVER_IN_BUFFER_SIZE;
7109 uschar *dsnlimitmsg;
7110 uschar *dsnnotifyhdr;
7114 debug_printf("sending error message to: %s\n", bounce_recipient);
7116 /* Scan the addresses for all that have the same errors address, removing
7117 them from the addr_failed chain, and putting them on msgchain. */
7119 paddr = &addr_failed;
7120 for (addr = addr_failed; addr; addr = *paddr)
7121 if (Ustrcmp(bounce_recipient, addr->prop.errors_address
7122 ? addr->prop.errors_address : sender_address) == 0)
7123 { /* The same - dechain */
7124 *paddr = addr->next;
7127 pmsgchain = &(addr->next);
7130 paddr = &addr->next; /* Not the same; skip */
7132 /* Include X-Failed-Recipients: for automatic interpretation, but do
7133 not let any one header line get too long. We do this by starting a
7134 new header every 50 recipients. Omit any addresses for which the
7135 "hide_child" flag is set. */
7137 for (addr = msgchain; addr; addr = addr->next)
7139 if (testflag(addr, af_hide_child)) continue;
7147 ? "X-Failed-Recipients: "
7149 testflag(addr, af_pfr) && addr->parent
7150 ? string_printing(addr->parent->address)
7151 : string_printing(addr->address));
7153 if (rcount > 0) fprintf(f, "\n");
7155 /* Output the standard headers */
7157 if (errors_reply_to)
7158 fprintf(f, "Reply-To: %s\n", errors_reply_to);
7159 fprintf(f, "Auto-Submitted: auto-replied\n");
7161 fprintf(f, "To: %s\n", bounce_recipient);
7163 /* generate boundary string and output MIME-Headers */
7164 bound = string_sprintf(TIME_T_FMT "-eximdsn-%d", time(NULL), rand());
7166 fprintf(f, "Content-Type: multipart/report;"
7167 " report-type=delivery-status; boundary=%s\n"
7168 "MIME-Version: 1.0\n",
7171 /* Open a template file if one is provided. Log failure to open, but
7172 carry on - default texts will be used. */
7174 if (bounce_message_file)
7175 if (!(emf = Ufopen(bounce_message_file, "rb")))
7176 log_write(0, LOG_MAIN|LOG_PANIC, "Failed to open %s for error "
7177 "message texts: %s", bounce_message_file, strerror(errno));
7179 /* Quietly copy to configured additional addresses if required. */
7181 if ((bcc = moan_check_errorcopy(bounce_recipient)))
7182 fprintf(f, "Bcc: %s\n", bcc);
7184 /* The texts for the message can be read from a template file; if there
7185 isn't one, or if it is too short, built-in texts are used. The first
7186 emf text is a Subject: and any other headers. */
7188 if ((emf_text = next_emf(emf, US"header")))
7189 fprintf(f, "%s\n", emf_text);
7191 fprintf(f, "Subject: Mail delivery failed%s\n\n",
7192 to_sender? ": returning message to sender" : "");
7194 /* output human readable part as text/plain section */
7196 "Content-type: text/plain; charset=us-ascii\n\n",
7199 if ((emf_text = next_emf(emf, US"intro")))
7200 fprintf(f, "%s", CS emf_text);
7204 /* This message has been reworded several times. It seems to be confusing to
7205 somebody, however it is worded. I have retreated to the original, simple
7207 "This message was created automatically by mail delivery software.\n");
7209 if (bounce_message_text)
7210 fprintf(f, "%s", CS bounce_message_text);
7213 "\nA message that you sent could not be delivered to one or more of its\n"
7214 "recipients. This is a permanent error. The following address(es) failed:\n");
7217 "\nA message sent by\n\n <%s>\n\n"
7218 "could not be delivered to one or more of its recipients. The following\n"
7219 "address(es) failed:\n", sender_address);
7223 /* Process the addresses, leaving them on the msgchain if they have a
7224 file name for a return message. (There has already been a check in
7225 post_process_one() for the existence of data in the message file.) A TRUE
7226 return from print_address_information() means that the address is not
7230 for (addr = msgchain; addr; addr = *paddr)
7232 if (print_address_information(addr, f, US" ", US"\n ", US""))
7233 print_address_error(addr, f, US"");
7235 /* End the final line for the address */
7239 /* Leave on msgchain if there's a return file. */
7241 if (addr->return_file >= 0)
7243 paddr = &(addr->next);
7247 /* Else save so that we can tick off the recipient when the
7252 *paddr = addr->next;
7253 addr->next = handled_addr;
7254 handled_addr = addr;
7260 /* Get the next text, whether we need it or not, so as to be
7261 positioned for the one after. */
7263 emf_text = next_emf(emf, US"generated text");
7265 /* If there were any file messages passed by the local transports,
7266 include them in the message. Then put the address on the handled chain.
7267 In the case of a batch of addresses that were all sent to the same
7268 transport, the return_file field in all of them will contain the same
7269 fd, and the return_filename field in the *last* one will be set (to the
7270 name of the file). */
7274 address_item *nextaddr;
7277 fprintf(f, "%s", CS emf_text);
7280 "The following text was generated during the delivery "
7281 "attempt%s:\n", (filecount > 1)? "s" : "");
7283 for (addr = msgchain; addr; addr = nextaddr)
7286 address_item *topaddr = addr;
7288 /* List all the addresses that relate to this file */
7291 while(addr) /* Insurance */
7293 print_address_information(addr, f, US"------ ", US"\n ",
7295 if (addr->return_filename) break;
7300 /* Now copy the file */
7302 if (!(fm = Ufopen(addr->return_filename, "rb")))
7303 fprintf(f, " +++ Exim error... failed to open text file: %s\n",
7307 while ((ch = fgetc(fm)) != EOF) fputc(ch, f);
7310 Uunlink(addr->return_filename);
7312 /* Can now add to handled chain, first fishing off the next
7313 address on the msgchain. */
7315 nextaddr = addr->next;
7316 addr->next = handled_addr;
7317 handled_addr = topaddr;
7322 /* output machine readable part */
7324 if (message_smtputf8)
7326 "Content-type: message/global-delivery-status\n\n"
7327 "Reporting-MTA: dns; %s\n",
7328 bound, smtp_active_hostname);
7332 "Content-type: message/delivery-status\n\n"
7333 "Reporting-MTA: dns; %s\n",
7334 bound, smtp_active_hostname);
7338 /* must be decoded from xtext: see RFC 3461:6.3a */
7340 if (auth_xtextdecode(dsn_envid, &xdec_envid) > 0)
7341 fprintf(f, "Original-Envelope-ID: %s\n", dsn_envid);
7343 fprintf(f, "X-Original-Envelope-ID: error decoding xtext formatted ENVID\n");
7347 for (addr = handled_addr; addr; addr = addr->next)
7350 fprintf(f, "Action: failed\n"
7351 "Final-Recipient: rfc822;%s\n"
7354 if ((hu = addr->host_used) && hu->name)
7357 fprintf(f, "Remote-MTA: dns; %s\n", hu->name);
7358 #ifdef EXPERIMENTAL_DSN_INFO
7361 uschar * p = hu->port == 25
7362 ? US"" : string_sprintf(":%d", hu->port);
7363 fprintf(f, "Remote-MTA: X-ip; [%s]%s\n", hu->address, p);
7365 if ((s = addr->smtp_greeting) && *s)
7366 fprintf(f, "X-Remote-MTA-smtp-greeting: X-str; %s\n", s);
7367 if ((s = addr->helo_response) && *s)
7368 fprintf(f, "X-Remote-MTA-helo-response: X-str; %s\n", s);
7369 if ((s = addr->message) && *s)
7370 fprintf(f, "X-Exim-Diagnostic: X-str; %s\n", s);
7372 print_dsn_diagnostic_code(addr, f);
7377 /* Now copy the message, trying to give an intelligible comment if
7378 it is too long for it all to be copied. The limit isn't strictly
7379 applied because of the buffering. There is, however, an option
7380 to suppress copying altogether. */
7382 emf_text = next_emf(emf, US"copy");
7385 we ignore the intro text from template and add
7386 the text for bounce_return_size_limit at the end.
7388 bounce_return_message is ignored
7389 in case RET= is defined we honor these values
7390 otherwise bounce_return_body is honored.
7392 bounce_return_size_limit is always honored.
7395 fprintf(f, "--%s\n", bound);
7397 dsnlimitmsg = US"X-Exim-DSN-Information: Due to administrative limits only headers are returned";
7398 dsnnotifyhdr = NULL;
7399 topt = topt_add_return_path;
7401 /* RET=HDRS? top priority */
7402 if (dsn_ret == dsn_ret_hdrs)
7403 topt |= topt_no_body;
7406 struct stat statbuf;
7408 /* no full body return at all? */
7409 if (!bounce_return_body)
7411 topt |= topt_no_body;
7412 /* add header if we overrule RET=FULL */
7413 if (dsn_ret == dsn_ret_full)
7414 dsnnotifyhdr = dsnlimitmsg;
7416 /* line length limited... return headers only if oversize */
7417 /* size limited ... return headers only if limit reached */
7418 else if ( max_received_linelength > bounce_return_linesize_limit
7419 || ( bounce_return_size_limit > 0
7420 && fstat(deliver_datafile, &statbuf) == 0
7421 && statbuf.st_size > max
7424 topt |= topt_no_body;
7425 dsnnotifyhdr = dsnlimitmsg;
7430 if (message_smtputf8)
7431 fputs(topt & topt_no_body ? "Content-type: message/global-headers\n\n"
7432 : "Content-type: message/global\n\n",
7436 fputs(topt & topt_no_body ? "Content-type: text/rfc822-headers\n\n"
7437 : "Content-type: message/rfc822\n\n",
7441 transport_filter_argv = NULL; /* Just in case */
7442 return_path = sender_address; /* In case not previously set */
7443 transport_write_message(NULL, fileno(f), topt,
7444 0, dsnnotifyhdr, NULL, NULL, NULL, NULL, 0);
7447 /* we never add the final text. close the file */
7451 fprintf(f, "\n--%s--\n", bound);
7453 /* Close the file, which should send an EOF to the child process
7454 that is receiving the message. Wait for it to finish. */
7457 rc = child_close(pid, 0); /* Waits for child to close, no timeout */
7459 /* In the test harness, let the child do it's thing first. */
7461 if (running_in_test_harness) millisleep(500);
7463 /* If the process failed, there was some disaster in setting up the
7464 error message. Unless the message is very old, ensure that addr_defer
7465 is non-null, which will have the effect of leaving the message on the
7466 spool. The failed addresses will get tried again next time. However, we
7467 don't really want this to happen too often, so freeze the message unless
7468 there are some genuine deferred addresses to try. To do this we have
7469 to call spool_write_header() here, because with no genuine deferred
7470 addresses the normal code below doesn't get run. */
7475 if (now - received_time < retry_maximum_timeout && !addr_defer)
7477 addr_defer = (address_item *)(+1);
7478 deliver_freeze = TRUE;
7479 deliver_frozen_at = time(NULL);
7480 /* Panic-dies on error */
7481 (void)spool_write_header(message_id, SW_DELIVERING, NULL);
7484 deliver_msglog("Process failed (%d) when writing error message "
7485 "to %s%s", rc, bounce_recipient, s);
7486 log_write(0, LOG_MAIN, "Process failed (%d) when writing error message "
7487 "to %s%s", rc, bounce_recipient, s);
7490 /* The message succeeded. Ensure that the recipients that failed are
7491 now marked finished with on the spool and their parents updated. */
7495 for (addr = handled_addr; addr; addr = addr->next)
7497 address_done(addr, logtod);
7498 child_done(addr, logtod);
7500 /* Panic-dies on error */
7501 (void)spool_write_header(message_id, SW_DELIVERING, NULL);
7507 disable_logging = FALSE; /* In case left set */
7509 /* Come here from the mua_wrapper case if routing goes wrong */
7513 /* If there are now no deferred addresses, we are done. Preserve the
7514 message log if so configured, and we are using them. Otherwise, sling it.
7515 Then delete the message itself. */
7521 sprintf(CS spoolname, "%s/msglog/%s/%s", spool_directory, message_subdir,
7523 if (preserve_message_logs)
7526 sprintf(CS big_buffer, "%s/msglog.OLD/%s", spool_directory, id);
7527 if ((rc = Urename(spoolname, big_buffer)) < 0)
7529 (void)directory_make(spool_directory, US"msglog.OLD",
7530 MSGLOG_DIRECTORY_MODE, TRUE);
7531 rc = Urename(spoolname, big_buffer);
7534 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to move %s to the "
7535 "msglog.OLD directory", spoolname);
7538 if (Uunlink(spoolname) < 0)
7539 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to unlink %s: %s",
7540 spoolname, strerror(errno));
7543 /* Remove the two message files. */
7545 sprintf(CS spoolname, "%s/input/%s/%s-D", spool_directory, message_subdir, id);
7546 if (Uunlink(spoolname) < 0)
7547 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to unlink %s: %s",
7548 spoolname, strerror(errno));
7549 sprintf(CS spoolname, "%s/input/%s/%s-H", spool_directory, message_subdir, id);
7550 if (Uunlink(spoolname) < 0)
7551 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to unlink %s: %s",
7552 spoolname, strerror(errno));
7554 /* Log the end of this message, with queue time if requested. */
7556 if (LOGGING(queue_time_overall))
7557 log_write(0, LOG_MAIN, "Completed QT=%s",
7558 readconf_printtime( (int) ((long)time(NULL) - (long)received_time)) );
7560 log_write(0, LOG_MAIN, "Completed");
7562 /* Unset deliver_freeze so that we won't try to move the spool files further down */
7563 deliver_freeze = FALSE;
7565 #ifndef DISABLE_EVENT
7566 (void) event_raise(event_action, US"msg:complete", NULL);
7570 /* If there are deferred addresses, we are keeping this message because it is
7571 not yet completed. Lose any temporary files that were catching output from
7572 pipes for any of the deferred addresses, handle one-time aliases, and see if
7573 the message has been on the queue for so long that it is time to send a warning
7574 message to the sender, unless it is a mailer-daemon. If all deferred addresses
7575 have the same domain, we can set deliver_domain for the expansion of
7576 delay_warning_ condition - if any of them are pipes, files, or autoreplies, use
7577 the parent's domain.
7579 If all the deferred addresses have an error number that indicates "retry time
7580 not reached", skip sending the warning message, because it won't contain the
7581 reason for the delay. It will get sent at the next real delivery attempt.
7582 However, if at least one address has tried, we'd better include all of them in
7585 If we can't make a process to send the message, don't worry.
7587 For mailing list expansions we want to send the warning message to the
7588 mailing list manager. We can't do a perfect job here, as some addresses may
7589 have different errors addresses, but if we take the errors address from
7590 each deferred address it will probably be right in most cases.
7592 If addr_defer == +1, it means there was a problem sending an error message
7593 for failed addresses, and there were no "real" deferred addresses. The value
7594 was set just to keep the message on the spool, so there is nothing to do here.
7597 else if (addr_defer != (address_item *)(+1))
7600 uschar *recipients = US"";
7601 BOOL delivery_attempted = FALSE;
7603 deliver_domain = testflag(addr_defer, af_pfr)
7604 ? addr_defer->parent->domain : addr_defer->domain;
7606 for (addr = addr_defer; addr; addr = addr->next)
7608 address_item *otaddr;
7610 if (addr->basic_errno > ERRNO_RETRY_BASE) delivery_attempted = TRUE;
7614 const uschar *d = testflag(addr, af_pfr)
7615 ? addr->parent->domain : addr->domain;
7617 /* The domain may be unset for an address that has never been routed
7618 because the system filter froze the message. */
7620 if (!d || Ustrcmp(d, deliver_domain) != 0)
7621 deliver_domain = NULL;
7624 if (addr->return_filename) Uunlink(addr->return_filename);
7626 /* Handle the case of one-time aliases. If any address in the ancestry
7627 of this one is flagged, ensure it is in the recipients list, suitably
7628 flagged, and that its parent is marked delivered. */
7630 for (otaddr = addr; otaddr; otaddr = otaddr->parent)
7631 if (otaddr->onetime_parent) break;
7636 int t = recipients_count;
7638 for (i = 0; i < recipients_count; i++)
7640 uschar *r = recipients_list[i].address;
7641 if (Ustrcmp(otaddr->onetime_parent, r) == 0) t = i;
7642 if (Ustrcmp(otaddr->address, r) == 0) break;
7645 /* Didn't find the address already in the list, and did find the
7646 ultimate parent's address in the list. After adding the recipient,
7647 update the errors address in the recipients list. */
7649 if (i >= recipients_count && t < recipients_count)
7651 DEBUG(D_deliver) debug_printf("one_time: adding %s in place of %s\n",
7652 otaddr->address, otaddr->parent->address);
7653 receive_add_recipient(otaddr->address, t);
7654 recipients_list[recipients_count-1].errors_to = otaddr->prop.errors_address;
7655 tree_add_nonrecipient(otaddr->parent->address);
7656 update_spool = TRUE;
7660 /* Except for error messages, ensure that either the errors address for
7661 this deferred address or, if there is none, the sender address, is on the
7662 list of recipients for a warning message. */
7664 if (sender_address[0] != 0)
7665 if (addr->prop.errors_address)
7667 if (Ustrstr(recipients, addr->prop.errors_address) == NULL)
7668 recipients = string_sprintf("%s%s%s", recipients,
7669 (recipients[0] == 0)? "" : ",", addr->prop.errors_address);
7673 if (Ustrstr(recipients, sender_address) == NULL)
7674 recipients = string_sprintf("%s%s%s", recipients,
7675 (recipients[0] == 0)? "" : ",", sender_address);
7679 /* Send a warning message if the conditions are right. If the condition check
7680 fails because of a lookup defer, there is nothing we can do. The warning
7681 is not sent. Another attempt will be made at the next delivery attempt (if
7685 && delivery_attempted
7686 && ( ((addr_defer->dsn_flags & rf_dsnflags) == 0)
7687 || (addr_defer->dsn_flags & rf_notify_delay) == rf_notify_delay
7689 && delay_warning[1] > 0
7690 && sender_address[0] != 0
7691 && ( !delay_warning_condition
7692 || expand_check_condition(delay_warning_condition,
7693 US"delay_warning", US"option")
7699 int queue_time = time(NULL) - received_time;
7701 /* When running in the test harness, there's an option that allows us to
7702 fudge this time so as to get repeatability of the tests. Take the first
7703 time off the list. In queue runs, the list pointer gets updated in the
7706 if (running_in_test_harness && fudged_queue_times[0] != 0)
7708 int qt = readconf_readtime(fudged_queue_times, '/', FALSE);
7711 DEBUG(D_deliver) debug_printf("fudged queue_times = %s\n",
7712 fudged_queue_times);
7717 /* See how many warnings we should have sent by now */
7719 for (count = 0; count < delay_warning[1]; count++)
7720 if (queue_time < delay_warning[count+2]) break;
7722 show_time = delay_warning[count+1];
7724 if (count >= delay_warning[1])
7727 int last_gap = show_time;
7728 if (count > 1) last_gap -= delay_warning[count];
7729 extra = (queue_time - delay_warning[count+1])/last_gap;
7730 show_time += last_gap * extra;
7736 debug_printf("time on queue = %s\n", readconf_printtime(queue_time));
7737 debug_printf("warning counts: required %d done %d\n", count,
7741 /* We have computed the number of warnings there should have been by now.
7742 If there haven't been enough, send one, and up the count to what it should
7745 if (warning_count < count)
7749 pid_t pid = child_open_exim(&fd);
7755 FILE *f = fdopen(fd, "wb");
7759 if (warn_message_file)
7760 if (!(wmf = Ufopen(warn_message_file, "rb")))
7761 log_write(0, LOG_MAIN|LOG_PANIC, "Failed to open %s for warning "
7762 "message texts: %s", warn_message_file, strerror(errno));
7764 warnmsg_recipients = recipients;
7765 warnmsg_delay = queue_time < 120*60
7766 ? string_sprintf("%d minutes", show_time/60)
7767 : string_sprintf("%d hours", show_time/3600);
7769 if (errors_reply_to)
7770 fprintf(f, "Reply-To: %s\n", errors_reply_to);
7771 fprintf(f, "Auto-Submitted: auto-replied\n");
7773 fprintf(f, "To: %s\n", recipients);
7775 /* generated boundary string and output MIME-Headers */
7776 bound = string_sprintf(TIME_T_FMT "-eximdsn-%d", time(NULL), rand());
7778 fprintf(f, "Content-Type: multipart/report;"
7779 " report-type=delivery-status; boundary=%s\n"
7780 "MIME-Version: 1.0\n",
7783 if ((wmf_text = next_emf(wmf, US"header")))
7784 fprintf(f, "%s\n", wmf_text);
7786 fprintf(f, "Subject: Warning: message %s delayed %s\n\n",
7787 message_id, warnmsg_delay);
7789 /* output human readable part as text/plain section */
7791 "Content-type: text/plain; charset=us-ascii\n\n",
7794 if ((wmf_text = next_emf(wmf, US"intro")))
7795 fprintf(f, "%s", CS wmf_text);
7799 "This message was created automatically by mail delivery software.\n");
7801 if (Ustrcmp(recipients, sender_address) == 0)
7803 "A message that you sent has not yet been delivered to one or more of its\n"
7804 "recipients after more than ");
7808 "A message sent by\n\n <%s>\n\n"
7809 "has not yet been delivered to one or more of its recipients after more than \n",
7812 fprintf(f, "%s on the queue on %s.\n\n"
7813 "The message identifier is: %s\n",
7814 warnmsg_delay, primary_hostname, message_id);
7816 for (h = header_list; h; h = h->next)
7817 if (strncmpic(h->text, US"Subject:", 8) == 0)
7818 fprintf(f, "The subject of the message is: %s", h->text + 9);
7819 else if (strncmpic(h->text, US"Date:", 5) == 0)
7820 fprintf(f, "The date of the message is: %s", h->text + 6);
7823 fprintf(f, "The address%s to which the message has not yet been "
7825 !addr_defer->next ? "" : "es",
7826 !addr_defer->next ? "is": "are");
7829 /* List the addresses, with error information if allowed */
7831 /* store addr_defer for machine readable part */
7832 address_item *addr_dsndefer = addr_defer;
7836 address_item *addr = addr_defer;
7837 addr_defer = addr->next;
7838 if (print_address_information(addr, f, US" ", US"\n ", US""))
7839 print_address_error(addr, f, US"Delay reason: ");
7848 if ((wmf_text = next_emf(wmf, US"final")))
7849 fprintf(f, "%s", CS wmf_text);
7855 "No action is required on your part. Delivery attempts will continue for\n"
7856 "some time, and this warning may be repeated at intervals if the message\n"
7857 "remains undelivered. Eventually the mail delivery software will give up,\n"
7858 "and when that happens, the message will be returned to you.\n");
7861 /* output machine readable part */
7862 fprintf(f, "\n--%s\n"
7863 "Content-type: message/delivery-status\n\n"
7864 "Reporting-MTA: dns; %s\n",
7866 smtp_active_hostname);
7871 /* must be decoded from xtext: see RFC 3461:6.3a */
7873 if (auth_xtextdecode(dsn_envid, &xdec_envid) > 0)
7874 fprintf(f,"Original-Envelope-ID: %s\n", dsn_envid);
7876 fprintf(f,"X-Original-Envelope-ID: error decoding xtext formatted ENVID\n");
7880 for ( ; addr_dsndefer; addr_dsndefer = addr_dsndefer->next)
7882 if (addr_dsndefer->dsn_orcpt)
7883 fprintf(f, "Original-Recipient: %s\n", addr_dsndefer->dsn_orcpt);
7885 fprintf(f, "Action: delayed\n"
7886 "Final-Recipient: rfc822;%s\n"
7888 addr_dsndefer->address);
7889 if (addr_dsndefer->host_used && addr_dsndefer->host_used->name)
7891 fprintf(f, "Remote-MTA: dns; %s\n",
7892 addr_dsndefer->host_used->name);
7893 print_dsn_diagnostic_code(addr_dsndefer, f);
7899 "Content-type: text/rfc822-headers\n\n",
7903 /* header only as required by RFC. only failure DSN needs to honor RET=FULL */
7904 topt = topt_add_return_path | topt_no_body;
7905 transport_filter_argv = NULL; /* Just in case */
7906 return_path = sender_address; /* In case not previously set */
7907 /* Write the original email out */
7908 transport_write_message(NULL, fileno(f), topt, 0, NULL, NULL, NULL, NULL, NULL, 0);
7911 fprintf(f,"\n--%s--\n", bound);
7915 /* Close and wait for child process to complete, without a timeout.
7916 If there's an error, don't update the count. */
7919 if (child_close(pid, 0) == 0)
7921 warning_count = count;
7922 update_spool = TRUE; /* Ensure spool rewritten */
7928 /* Clear deliver_domain */
7930 deliver_domain = NULL;
7932 /* If this was a first delivery attempt, unset the first time flag, and
7933 ensure that the spool gets updated. */
7935 if (deliver_firsttime)
7937 deliver_firsttime = FALSE;
7938 update_spool = TRUE;
7941 /* If delivery was frozen and freeze_tell is set, generate an appropriate
7942 message, unless the message is a local error message (to avoid loops). Then
7943 log the freezing. If the text in "frozen_info" came from a system filter,
7944 it has been escaped into printing characters so as not to mess up log lines.
7945 For the "tell" message, we turn \n back into newline. Also, insert a newline
7946 near the start instead of the ": " string. */
7950 if (freeze_tell && freeze_tell[0] != 0 && !local_error_message)
7952 uschar *s = string_copy(frozen_info);
7953 uschar *ss = Ustrstr(s, " by the system filter: ");
7964 if (*ss == '\\' && ss[1] == 'n')
7971 moan_tell_someone(freeze_tell, addr_defer, US"Message frozen",
7972 "Message %s has been frozen%s.\nThe sender is <%s>.\n", message_id,
7976 /* Log freezing just before we update the -H file, to minimize the chance
7977 of a race problem. */
7979 deliver_msglog("*** Frozen%s\n", frozen_info);
7980 log_write(0, LOG_MAIN, "Frozen%s", frozen_info);
7983 /* If there have been any updates to the non-recipients list, or other things
7984 that get written to the spool, we must now update the spool header file so
7985 that it has the right information for the next delivery attempt. If there
7986 was more than one address being delivered, the header_change update is done
7987 earlier, in case one succeeds and then something crashes. */
7990 debug_printf("delivery deferred: update_spool=%d header_rewritten=%d\n",
7991 update_spool, header_rewritten);
7993 if (update_spool || header_rewritten)
7994 /* Panic-dies on error */
7995 (void)spool_write_header(message_id, SW_DELIVERING, NULL);
7998 /* Finished with the message log. If the message is complete, it will have
7999 been unlinked or renamed above. */
8001 if (message_logs) (void)fclose(message_log);
8003 /* Now we can close and remove the journal file. Its only purpose is to record
8004 successfully completed deliveries asap so that this information doesn't get
8005 lost if Exim (or the machine) crashes. Forgetting about a failed delivery is
8006 not serious, as trying it again is not harmful. The journal might not be open
8007 if all addresses were deferred at routing or directing. Nevertheless, we must
8008 remove it if it exists (may have been lying around from a crash during the
8009 previous delivery attempt). We don't remove the journal if a delivery
8010 subprocess failed to pass back delivery information; this is controlled by
8011 the remove_journal flag. When the journal is left, we also don't move the
8012 message off the main spool if frozen and the option is set. It should get moved
8013 at the next attempt, after the journal has been inspected. */
8015 if (journal_fd >= 0) (void)close(journal_fd);
8019 sprintf(CS spoolname, "%s/input/%s/%s-J", spool_directory, message_subdir, id);
8020 if (Uunlink(spoolname) < 0 && errno != ENOENT)
8021 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to unlink %s: %s", spoolname,
8024 /* Move the message off the spool if reqested */
8026 #ifdef SUPPORT_MOVE_FROZEN_MESSAGES
8027 if (deliver_freeze && move_frozen_messages)
8028 (void)spool_move_message(id, message_subdir, US"", US"F");
8032 /* Closing the data file frees the lock; if the file has been unlinked it
8033 will go away. Otherwise the message becomes available for another process
8036 (void)close(deliver_datafile);
8037 deliver_datafile = -1;
8038 DEBUG(D_deliver) debug_printf("end delivery of %s\n", id);
8040 /* It is unlikely that there will be any cached resources, since they are
8041 released after routing, and in the delivery subprocesses. However, it's
8042 possible for an expansion for something afterwards (for example,
8043 expand_check_condition) to do a lookup. We must therefore be sure everything is
8047 acl_where = ACL_WHERE_UNKNOWN;
8056 if (!regex_PIPELINING) regex_PIPELINING =
8057 regex_must_compile(US"\\n250[\\s\\-]PIPELINING(\\s|\\n|$)", FALSE, TRUE);
8059 if (!regex_SIZE) regex_SIZE =
8060 regex_must_compile(US"\\n250[\\s\\-]SIZE(\\s|\\n|$)", FALSE, TRUE);
8062 if (!regex_AUTH) regex_AUTH =
8063 regex_must_compile(US"\\n250[\\s\\-]AUTH\\s+([\\-\\w\\s]+)(?:\\n|$)",
8067 if (!regex_STARTTLS) regex_STARTTLS =
8068 regex_must_compile(US"\\n250[\\s\\-]STARTTLS(\\s|\\n|$)", FALSE, TRUE);
8071 #ifndef DISABLE_PRDR
8072 if (!regex_PRDR) regex_PRDR =
8073 regex_must_compile(US"\\n250[\\s\\-]PRDR(\\s|\\n|$)", FALSE, TRUE);
8077 if (!regex_UTF8) regex_UTF8 =
8078 regex_must_compile(US"\\n250[\\s\\-]SMTPUTF8(\\s|\\n|$)", FALSE, TRUE);
8081 if (!regex_DSN) regex_DSN =
8082 regex_must_compile(US"\\n250[\\s\\-]DSN(\\s|\\n|$)", FALSE, TRUE);
8084 if (!regex_IGNOREQUOTA) regex_IGNOREQUOTA =
8085 regex_must_compile(US"\\n250[\\s\\-]IGNOREQUOTA(\\s|\\n|$)", FALSE, TRUE);
8090 deliver_get_sender_address (uschar * id)
8093 uschar * new_sender_address,
8094 * save_sender_address;
8096 if (!spool_open_datafile(id))
8099 /* Save and restore the global sender_address. I'm not sure if we should
8100 not save/restore all the other global variables too, because
8101 spool_read_header() may change all of them. But OTOH, when this
8102 deliver_get_sender_address() gets called, the current message is done
8103 already and nobody needs the globals anymore. (HS12, 2015-08-21) */
8105 sprintf(CS spoolname, "%s-H", id);
8106 save_sender_address = sender_address;
8108 rc = spool_read_header(spoolname, TRUE, TRUE);
8110 new_sender_address = sender_address;
8111 sender_address = save_sender_address;
8113 if (rc != spool_read_OK)
8116 assert(new_sender_address);
8118 (void)close(deliver_datafile);
8119 deliver_datafile = -1;
8121 return new_sender_address;
8126 /* End of deliver.c */