1 /*************************************************
2 * Exim - an Internet mail transport agent *
3 *************************************************/
5 /* Copyright (c) University of Cambridge 1995 - 2015 */
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 #ifdef EXPERIMENTAL_REDIS
1089 || Ustrstr(s, "redis") != NULL
1091 || Ustrstr(s, "sqlite") != NULL
1092 || Ustrstr(s, "ldap:") != NULL
1093 || Ustrstr(s, "ldapdn:") != NULL
1094 || Ustrstr(s, "ldapm:") != NULL
1096 addr->message = string_sprintf("Temporary internal error");
1099 /* If we used a transport that has one of the "return_output" options set, and
1100 if it did in fact generate some output, then for return_output we treat the
1101 message as failed if it was not already set that way, so that the output gets
1102 returned to the sender, provided there is a sender to send it to. For
1103 return_fail_output, do this only if the delivery failed. Otherwise we just
1104 unlink the file, and remove the name so that if the delivery failed, we don't
1105 try to send back an empty or unwanted file. The log_output options operate only
1106 on a non-empty file.
1108 In any case, we close the message file, because we cannot afford to leave a
1109 file-descriptor for one address while processing (maybe very many) others. */
1111 if (addr->return_file >= 0 && addr->return_filename)
1113 BOOL return_output = FALSE;
1114 struct stat statbuf;
1115 (void)EXIMfsync(addr->return_file);
1117 /* If there is no output, do nothing. */
1119 if (fstat(addr->return_file, &statbuf) == 0 && statbuf.st_size > 0)
1121 transport_instance *tb = addr->transport;
1123 /* Handle logging options */
1126 || result == FAIL && tb->log_fail_output
1127 || result == DEFER && tb->log_defer_output
1131 FILE *f = Ufopen(addr->return_filename, "rb");
1133 log_write(0, LOG_MAIN|LOG_PANIC, "failed to open %s to log output "
1134 "from %s transport: %s", addr->return_filename, tb->name,
1137 if ((s = US Ufgets(big_buffer, big_buffer_size, f)))
1139 uschar *p = big_buffer + Ustrlen(big_buffer);
1141 while (p > big_buffer && isspace(p[-1])) p--;
1143 sp = string_printing(big_buffer);
1144 log_write(0, LOG_MAIN, "<%s>: %s transport output: %s",
1145 addr->address, tb->name, sp);
1150 /* Handle returning options, but only if there is an address to return
1153 if (sender_address[0] != 0 || addr->prop.errors_address)
1154 if (tb->return_output)
1156 addr->transport_return = result = FAIL;
1157 if (addr->basic_errno == 0 && !addr->message)
1158 addr->message = US"return message generated";
1159 return_output = TRUE;
1162 if (tb->return_fail_output && result == FAIL) return_output = TRUE;
1165 /* Get rid of the file unless it might be returned, but close it in
1170 Uunlink(addr->return_filename);
1171 addr->return_filename = NULL;
1172 addr->return_file = -1;
1175 (void)close(addr->return_file);
1178 /* The success case happens only after delivery by a transport. */
1182 addr->next = addr_succeed;
1183 addr_succeed = addr;
1185 /* Call address_done() to ensure that we don't deliver to this address again,
1186 and write appropriate things to the message log. If it is a child address, we
1187 call child_done() to scan the ancestors and mark them complete if this is the
1188 last child to complete. */
1190 address_done(addr, now);
1191 DEBUG(D_deliver) debug_printf("%s delivered\n", addr->address);
1194 deliver_msglog("%s %s: %s%s succeeded\n", now, addr->address,
1195 driver_name, driver_kind);
1198 deliver_msglog("%s %s <%s>: %s%s succeeded\n", now, addr->address,
1199 addr->parent->address, driver_name, driver_kind);
1200 child_done(addr, now);
1203 /* Certificates for logging (via events) */
1205 tls_out.ourcert = addr->ourcert;
1206 addr->ourcert = NULL;
1207 tls_out.peercert = addr->peercert;
1208 addr->peercert = NULL;
1210 tls_out.cipher = addr->cipher;
1211 tls_out.peerdn = addr->peerdn;
1212 tls_out.ocsp = addr->ocsp;
1213 # ifdef EXPERIMENTAL_DANE
1214 tls_out.dane_verified = testflag(addr, af_dane_verified);
1218 delivery_log(LOG_MAIN, addr, logchar, NULL);
1221 tls_free_cert(&tls_out.ourcert);
1222 tls_free_cert(&tls_out.peercert);
1223 tls_out.cipher = NULL;
1224 tls_out.peerdn = NULL;
1225 tls_out.ocsp = OCSP_NOT_REQ;
1226 # ifdef EXPERIMENTAL_DANE
1227 tls_out.dane_verified = FALSE;
1233 /* Soft failure, or local delivery process failed; freezing may be
1236 else if (result == DEFER || result == PANIC)
1238 if (result == PANIC) logflags |= LOG_PANIC;
1240 /* This puts them on the chain in reverse order. Do not change this, because
1241 the code for handling retries assumes that the one with the retry
1242 information is last. */
1244 addr->next = addr_defer;
1247 /* The only currently implemented special action is to freeze the
1248 message. Logging of this is done later, just before the -H file is
1251 if (addr->special_action == SPECIAL_FREEZE)
1253 deliver_freeze = TRUE;
1254 deliver_frozen_at = time(NULL);
1255 update_spool = TRUE;
1258 /* If doing a 2-stage queue run, we skip writing to either the message
1259 log or the main log for SMTP defers. */
1261 if (!queue_2stage || addr->basic_errno != 0)
1265 /* For errors of the type "retry time not reached" (also remotes skipped
1266 on queue run), logging is controlled by L_retry_defer. Note that this kind
1267 of error number is negative, and all the retry ones are less than any
1270 unsigned int use_log_selector = addr->basic_errno <= ERRNO_RETRY_BASE
1271 ? L_retry_defer : 0;
1273 /* Build up the line that is used for both the message log and the main
1276 s = reset_point = store_get(size);
1278 /* Create the address string for logging. Must not do this earlier, because
1279 an OK result may be changed to FAIL when a pipe returns text. */
1281 log_address = string_log_address(addr, LOGGING(all_parents), result == OK);
1283 s = string_cat(s, &size, &ptr, log_address, Ustrlen(log_address));
1285 /* Either driver_name contains something and driver_kind contains
1286 " router" or " transport" (note the leading space), or driver_name is
1287 a null string and driver_kind contains "routing" without the leading
1288 space, if all routing has been deferred. When a domain has been held,
1289 so nothing has been done at all, both variables contain null strings. */
1293 if (driver_kind[1] == 't' && addr->router)
1294 s = string_append(s, &size, &ptr, 2, US" R=", addr->router->name);
1296 ss[1] = toupper(driver_kind[1]);
1297 s = string_append(s, &size, &ptr, 2, ss, driver_name);
1299 else if (driver_kind)
1300 s = string_append(s, &size, &ptr, 2, US" ", driver_kind);
1302 sprintf(CS ss, " defer (%d)", addr->basic_errno);
1303 s = string_cat(s, &size, &ptr, ss, Ustrlen(ss));
1305 if (addr->basic_errno > 0)
1306 s = string_append(s, &size, &ptr, 2, US": ",
1307 US strerror(addr->basic_errno));
1309 if (addr->host_used)
1311 s = string_append(s, &size, &ptr, 5,
1312 US" H=", addr->host_used->name,
1313 US" [", addr->host_used->address, US"]");
1314 if (LOGGING(outgoing_port))
1316 int port = addr->host_used->port;
1317 s = string_append(s, &size, &ptr, 2,
1318 US":", port == PORT_NONE ? US"25" : string_sprintf("%d", port));
1323 s = string_append(s, &size, &ptr, 2, US": ", addr->message);
1327 /* Log the deferment in the message log, but don't clutter it
1328 up with retry-time defers after the first delivery attempt. */
1330 if (deliver_firsttime || addr->basic_errno > ERRNO_RETRY_BASE)
1331 deliver_msglog("%s %s\n", now, s);
1333 /* Write the main log and reset the store */
1335 log_write(use_log_selector, logflags, "== %s", s);
1336 store_reset(reset_point);
1341 /* Hard failure. If there is an address to which an error message can be sent,
1342 put this address on the failed list. If not, put it on the deferred list and
1343 freeze the mail message for human attention. The latter action can also be
1344 explicitly requested by a router or transport. */
1348 /* If this is a delivery error, or a message for which no replies are
1349 wanted, and the message's age is greater than ignore_bounce_errors_after,
1350 force the af_ignore_error flag. This will cause the address to be discarded
1351 later (with a log entry). */
1353 if (sender_address[0] == 0 && message_age >= ignore_bounce_errors_after)
1354 setflag(addr, af_ignore_error);
1356 /* Freeze the message if requested, or if this is a bounce message (or other
1357 message with null sender) and this address does not have its own errors
1358 address. However, don't freeze if errors are being ignored. The actual code
1359 to ignore occurs later, instead of sending a message. Logging of freezing
1360 occurs later, just before writing the -H file. */
1362 if ( !testflag(addr, af_ignore_error)
1363 && ( addr->special_action == SPECIAL_FREEZE
1364 || (sender_address[0] == 0 && !addr->prop.errors_address)
1367 frozen_info = addr->special_action == SPECIAL_FREEZE
1369 : sender_local && !local_error_message
1370 ? US" (message created with -f <>)"
1371 : US" (delivery error message)";
1372 deliver_freeze = TRUE;
1373 deliver_frozen_at = time(NULL);
1374 update_spool = TRUE;
1376 /* The address is put on the defer rather than the failed queue, because
1377 the message is being retained. */
1379 addr->next = addr_defer;
1383 /* Don't put the address on the nonrecipients tree yet; wait until an
1384 error message has been successfully sent. */
1388 addr->next = addr_failed;
1392 /* Build up the log line for the message and main logs */
1394 s = reset_point = store_get(size);
1396 /* Create the address string for logging. Must not do this earlier, because
1397 an OK result may be changed to FAIL when a pipe returns text. */
1399 log_address = string_log_address(addr, LOGGING(all_parents), result == OK);
1401 s = string_cat(s, &size, &ptr, log_address, Ustrlen(log_address));
1403 if (LOGGING(sender_on_delivery))
1404 s = string_append(s, &size, &ptr, 3, US" F=<", sender_address, US">");
1406 /* Return path may not be set if no delivery actually happened */
1408 if (used_return_path && LOGGING(return_path_on_delivery))
1409 s = string_append(s, &size, &ptr, 3, US" P=<", used_return_path, US">");
1412 s = string_append(s, &size, &ptr, 2, US" R=", addr->router->name);
1413 if (addr->transport)
1414 s = string_append(s, &size, &ptr, 2, US" T=", addr->transport->name);
1416 if (addr->host_used)
1417 s = d_hostlog(s, &size, &ptr, addr);
1420 s = d_tlslog(s, &size, &ptr, addr);
1423 if (addr->basic_errno > 0)
1424 s = string_append(s, &size, &ptr, 2, US": ",
1425 US strerror(addr->basic_errno));
1428 s = string_append(s, &size, &ptr, 2, US": ", addr->message);
1432 /* Do the logging. For the message log, "routing failed" for those cases,
1433 just to make it clearer. */
1436 deliver_msglog("%s %s\n", now, s);
1438 deliver_msglog("%s %s failed for %s\n", now, driver_kind, s);
1440 log_write(0, LOG_MAIN, "** %s", s);
1442 #ifndef DISABLE_EVENT
1443 msg_event_raise(US"msg:fail:delivery", addr);
1446 store_reset(reset_point);
1449 /* Ensure logging is turned on again in all cases */
1451 disable_logging = FALSE;
1457 /*************************************************
1458 * Address-independent error *
1459 *************************************************/
1461 /* This function is called when there's an error that is not dependent on a
1462 particular address, such as an expansion string failure. It puts the error into
1463 all the addresses in a batch, logs the incident on the main and panic logs, and
1464 clears the expansions. It is mostly called from local_deliver(), but can be
1465 called for a remote delivery via findugid().
1468 logit TRUE if (MAIN+PANIC) logging required
1469 addr the first of the chain of addresses
1471 format format string for error message, or NULL if already set in addr
1472 ... arguments for the format
1478 common_error(BOOL logit, address_item *addr, int code, uschar *format, ...)
1480 address_item *addr2;
1481 addr->basic_errno = code;
1487 va_start(ap, format);
1488 if (!string_vformat(buffer, sizeof(buffer), CS format, ap))
1489 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
1490 "common_error expansion was longer than " SIZE_T_FMT, sizeof(buffer));
1492 addr->message = string_copy(buffer);
1495 for (addr2 = addr->next; addr2; addr2 = addr2->next)
1497 addr2->basic_errno = code;
1498 addr2->message = addr->message;
1501 if (logit) log_write(0, LOG_MAIN|LOG_PANIC, "%s", addr->message);
1502 deliver_set_expansions(NULL);
1508 /*************************************************
1509 * Check a "never users" list *
1510 *************************************************/
1512 /* This function is called to check whether a uid is on one of the two "never
1516 uid the uid to be checked
1517 nusers the list to be scanned; the first item in the list is the count
1519 Returns: TRUE if the uid is on the list
1523 check_never_users(uid_t uid, uid_t *nusers)
1526 if (!nusers) return FALSE;
1527 for (i = 1; i <= (int)(nusers[0]); i++) if (nusers[i] == uid) return TRUE;
1533 /*************************************************
1534 * Find uid and gid for a transport *
1535 *************************************************/
1537 /* This function is called for both local and remote deliveries, to find the
1538 uid/gid under which to run the delivery. The values are taken preferentially
1539 from the transport (either explicit or deliver_as_creator), then from the
1540 address (i.e. the router), and if nothing is set, the exim uid/gid are used. If
1541 the resulting uid is on the "never_users" or the "fixed_never_users" list, a
1542 panic error is logged, and the function fails (which normally leads to delivery
1546 addr the address (possibly a chain)
1548 uidp pointer to uid field
1549 gidp pointer to gid field
1550 igfp pointer to the use_initgroups field
1552 Returns: FALSE if failed - error has been set in address(es)
1556 findugid(address_item *addr, transport_instance *tp, uid_t *uidp, gid_t *gidp,
1560 BOOL gid_set = FALSE;
1562 /* Default initgroups flag comes from the transport */
1564 *igfp = tp->initgroups;
1566 /* First see if there's a gid on the transport, either fixed or expandable.
1567 The expanding function always logs failure itself. */
1574 else if (tp->expand_gid)
1576 if (!route_find_expanded_group(tp->expand_gid, tp->name, US"transport", gidp,
1579 common_error(FALSE, addr, ERRNO_GIDFAIL, NULL);
1585 /* If the transport did not set a group, see if the router did. */
1587 if (!gid_set && testflag(addr, af_gid_set))
1593 /* Pick up a uid from the transport if one is set. */
1595 if (tp->uid_set) *uidp = tp->uid;
1597 /* Otherwise, try for an expandable uid field. If it ends up as a numeric id,
1598 it does not provide a passwd value from which a gid can be taken. */
1600 else if (tp->expand_uid)
1603 if (!route_find_expanded_user(tp->expand_uid, tp->name, US"transport", &pw,
1604 uidp, &(addr->message)))
1606 common_error(FALSE, addr, ERRNO_UIDFAIL, NULL);
1616 /* If the transport doesn't set the uid, test the deliver_as_creator flag. */
1618 else if (tp->deliver_as_creator)
1620 *uidp = originator_uid;
1623 *gidp = originator_gid;
1628 /* Otherwise see if the address specifies the uid and if so, take it and its
1631 else if (testflag(addr, af_uid_set))
1634 *igfp = testflag(addr, af_initgroups);
1637 /* Nothing has specified the uid - default to the Exim user, and group if the
1650 /* If no gid is set, it is a disaster. We default to the Exim gid only if
1651 defaulting to the Exim uid. In other words, if the configuration has specified
1652 a uid, it must also provide a gid. */
1656 common_error(TRUE, addr, ERRNO_GIDFAIL, US"User set without group for "
1657 "%s transport", tp->name);
1661 /* Check that the uid is not on the lists of banned uids that may not be used
1662 for delivery processes. */
1664 nuname = check_never_users(*uidp, never_users)
1666 : check_never_users(*uidp, fixed_never_users)
1667 ? US"fixed_never_users"
1671 common_error(TRUE, addr, ERRNO_UIDFAIL, US"User %ld set for %s transport "
1672 "is on the %s list", (long int)(*uidp), tp->name, nuname);
1684 /*************************************************
1685 * Check the size of a message for a transport *
1686 *************************************************/
1688 /* Checks that the message isn't too big for the selected transport.
1689 This is called only when it is known that the limit is set.
1693 addr the (first) address being delivered
1696 DEFER expansion failed or did not yield an integer
1697 FAIL message too big
1701 check_message_size(transport_instance *tp, address_item *addr)
1706 deliver_set_expansions(addr);
1707 size_limit = expand_string_integer(tp->message_size_limit, TRUE);
1708 deliver_set_expansions(NULL);
1710 if (expand_string_message)
1713 addr->message = size_limit == -1
1714 ? string_sprintf("failed to expand message_size_limit "
1715 "in %s transport: %s", tp->name, expand_string_message)
1716 : string_sprintf("invalid message_size_limit "
1717 "in %s transport: %s", tp->name, expand_string_message);
1719 else if (size_limit > 0 && message_size > size_limit)
1723 string_sprintf("message is too big (transport limit = %d)",
1732 /*************************************************
1733 * Transport-time check for a previous delivery *
1734 *************************************************/
1736 /* Check that this base address hasn't previously been delivered to its routed
1737 transport. If it has been delivered, mark it done. The check is necessary at
1738 delivery time in order to handle homonymic addresses correctly in cases where
1739 the pattern of redirection changes between delivery attempts (so the unique
1740 fields change). Non-homonymic previous delivery is detected earlier, at routing
1741 time (which saves unnecessary routing).
1744 addr the address item
1745 testing TRUE if testing wanted only, without side effects
1747 Returns: TRUE if previously delivered by the transport
1751 previously_transported(address_item *addr, BOOL testing)
1753 (void)string_format(big_buffer, big_buffer_size, "%s/%s",
1754 addr->unique + (testflag(addr, af_homonym)? 3:0), addr->transport->name);
1756 if (tree_search(tree_nonrecipients, big_buffer) != 0)
1758 DEBUG(D_deliver|D_route|D_transport)
1759 debug_printf("%s was previously delivered (%s transport): discarded\n",
1760 addr->address, addr->transport->name);
1761 if (!testing) child_done(addr, tod_stamp(tod_log));
1770 /******************************************************
1771 * Check for a given header in a header string *
1772 ******************************************************/
1774 /* This function is used when generating quota warnings. The configuration may
1775 specify any header lines it likes in quota_warn_message. If certain of them are
1776 missing, defaults are inserted, so we need to be able to test for the presence
1780 hdr the required header name
1781 hstring the header string
1783 Returns: TRUE the header is in the string
1784 FALSE the header is not in the string
1788 contains_header(uschar *hdr, uschar *hstring)
1790 int len = Ustrlen(hdr);
1791 uschar *p = hstring;
1794 if (strncmpic(p, hdr, len) == 0)
1797 while (*p == ' ' || *p == '\t') p++;
1798 if (*p == ':') return TRUE;
1800 while (*p != 0 && *p != '\n') p++;
1801 if (*p == '\n') p++;
1809 /*************************************************
1810 * Perform a local delivery *
1811 *************************************************/
1813 /* Each local delivery is performed in a separate process which sets its
1814 uid and gid as specified. This is a safer way than simply changing and
1815 restoring using seteuid(); there is a body of opinion that seteuid() cannot be
1816 used safely. From release 4, Exim no longer makes any use of it. Besides, not
1817 all systems have seteuid().
1819 If the uid/gid are specified in the transport_instance, they are used; the
1820 transport initialization must ensure that either both or neither are set.
1821 Otherwise, the values associated with the address are used. If neither are set,
1822 it is a configuration error.
1824 The transport or the address may specify a home directory (transport over-
1825 rides), and if they do, this is set as $home. If neither have set a working
1826 directory, this value is used for that as well. Otherwise $home is left unset
1827 and the cwd is set to "/" - a directory that should be accessible to all users.
1829 Using a separate process makes it more complicated to get error information
1830 back. We use a pipe to pass the return code and also an error code and error
1831 text string back to the parent process.
1834 addr points to an address block for this delivery; for "normal" local
1835 deliveries this is the only address to be delivered, but for
1836 pseudo-remote deliveries (e.g. by batch SMTP to a file or pipe)
1837 a number of addresses can be handled simultaneously, and in this
1838 case addr will point to a chain of addresses with the same
1841 shadowing TRUE if running a shadow transport; this causes output from pipes
1848 deliver_local(address_item *addr, BOOL shadowing)
1850 BOOL use_initgroups;
1853 int status, len, rc;
1856 uschar *working_directory;
1857 address_item *addr2;
1858 transport_instance *tp = addr->transport;
1860 /* Set up the return path from the errors or sender address. If the transport
1861 has its own return path setting, expand it and replace the existing value. */
1863 if(addr->prop.errors_address)
1864 return_path = addr->prop.errors_address;
1865 #ifdef EXPERIMENTAL_SRS
1866 else if (addr->prop.srs_sender)
1867 return_path = addr->prop.srs_sender;
1870 return_path = sender_address;
1872 if (tp->return_path)
1874 uschar *new_return_path = expand_string(tp->return_path);
1875 if (!new_return_path)
1877 if (!expand_string_forcedfail)
1879 common_error(TRUE, addr, ERRNO_EXPANDFAIL,
1880 US"Failed to expand return path \"%s\" in %s transport: %s",
1881 tp->return_path, tp->name, expand_string_message);
1885 else return_path = new_return_path;
1888 /* For local deliveries, one at a time, the value used for logging can just be
1889 set directly, once and for all. */
1891 used_return_path = return_path;
1893 /* Sort out the uid, gid, and initgroups flag. If an error occurs, the message
1894 gets put into the address(es), and the expansions are unset, so we can just
1897 if (!findugid(addr, tp, &uid, &gid, &use_initgroups)) return;
1899 /* See if either the transport or the address specifies a home directory. A
1900 home directory set in the address may already be expanded; a flag is set to
1901 indicate that. In other cases we must expand it. */
1903 if ( (deliver_home = tp->home_dir) /* Set in transport, or */
1904 || ( (deliver_home = addr->home_dir) /* Set in address and */
1905 && !testflag(addr, af_home_expanded) /* not expanded */
1908 uschar *rawhome = deliver_home;
1909 deliver_home = NULL; /* in case it contains $home */
1910 if (!(deliver_home = expand_string(rawhome)))
1912 common_error(TRUE, addr, ERRNO_EXPANDFAIL, US"home directory \"%s\" failed "
1913 "to expand for %s transport: %s", rawhome, tp->name,
1914 expand_string_message);
1917 if (*deliver_home != '/')
1919 common_error(TRUE, addr, ERRNO_NOTABSOLUTE, US"home directory path \"%s\" "
1920 "is not absolute for %s transport", deliver_home, tp->name);
1925 /* See if either the transport or the address specifies a current directory,
1926 and if so, expand it. If nothing is set, use the home directory, unless it is
1927 also unset in which case use "/", which is assumed to be a directory to which
1928 all users have access. It is necessary to be in a visible directory for some
1929 operating systems when running pipes, as some commands (e.g. "rm" under Solaris
1930 2.5) require this. */
1932 working_directory = tp->current_dir ? tp->current_dir : addr->current_dir;
1933 if (working_directory)
1935 uschar *raw = working_directory;
1936 if (!(working_directory = expand_string(raw)))
1938 common_error(TRUE, addr, ERRNO_EXPANDFAIL, US"current directory \"%s\" "
1939 "failed to expand for %s transport: %s", raw, tp->name,
1940 expand_string_message);
1943 if (*working_directory != '/')
1945 common_error(TRUE, addr, ERRNO_NOTABSOLUTE, US"current directory path "
1946 "\"%s\" is not absolute for %s transport", working_directory, tp->name);
1950 else working_directory = deliver_home ? deliver_home : US"/";
1952 /* If one of the return_output flags is set on the transport, create and open a
1953 file in the message log directory for the transport to write its output onto.
1954 This is mainly used by pipe transports. The file needs to be unique to the
1955 address. This feature is not available for shadow transports. */
1958 && ( tp->return_output || tp->return_fail_output
1959 || tp->log_output || tp->log_fail_output || tp->log_defer_output
1963 addr->return_filename =
1964 string_sprintf("%s/msglog/%s/%s-%d-%d", spool_directory, message_subdir,
1965 message_id, getpid(), return_count++);
1966 addr->return_file = open_msglog_file(addr->return_filename, 0400, &error);
1967 if (addr->return_file < 0)
1969 common_error(TRUE, addr, errno, US"Unable to %s file for %s transport "
1970 "to return message: %s", error, tp->name, strerror(errno));
1975 /* Create the pipe for inter-process communication. */
1979 common_error(TRUE, addr, ERRNO_PIPEFAIL, US"Creation of pipe failed: %s",
1984 /* Now fork the process to do the real work in the subprocess, but first
1985 ensure that all cached resources are freed so that the subprocess starts with
1986 a clean slate and doesn't interfere with the parent process. */
1990 if ((pid = fork()) == 0)
1992 BOOL replicate = TRUE;
1994 /* Prevent core dumps, as we don't want them in users' home directories.
1995 HP-UX doesn't have RLIMIT_CORE; I don't know how to do this in that
1996 system. Some experimental/developing systems (e.g. GNU/Hurd) may define
1997 RLIMIT_CORE but not support it in setrlimit(). For such systems, do not
1998 complain if the error is "not supported".
2000 There are two scenarios where changing the max limit has an effect. In one,
2001 the user is using a .forward and invoking a command of their choice via pipe;
2002 for these, we do need the max limit to be 0 unless the admin chooses to
2003 permit an increased limit. In the other, the command is invoked directly by
2004 the transport and is under administrator control, thus being able to raise
2005 the limit aids in debugging. So there's no general always-right answer.
2007 Thus we inhibit core-dumps completely but let individual transports, while
2008 still root, re-raise the limits back up to aid debugging. We make the
2009 default be no core-dumps -- few enough people can use core dumps in
2010 diagnosis that it's reasonable to make them something that has to be explicitly requested.
2017 if (setrlimit(RLIMIT_CORE, &rl) < 0)
2019 # ifdef SETRLIMIT_NOT_SUPPORTED
2020 if (errno != ENOSYS && errno != ENOTSUP)
2022 log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_CORE) failed: %s",
2027 /* Reset the random number generator, so different processes don't all
2028 have the same sequence. */
2032 /* If the transport has a setup entry, call this first, while still
2033 privileged. (Appendfile uses this to expand quota, for example, while
2034 able to read private files.) */
2036 if (addr->transport->setup)
2037 switch((addr->transport->setup)(addr->transport, addr, NULL, uid, gid,
2041 addr->transport_return = DEFER;
2045 addr->transport_return = PANIC;
2049 /* Ignore SIGINT and SIGTERM during delivery. Also ignore SIGUSR1, as
2050 when the process becomes unprivileged, it won't be able to write to the
2051 process log. SIGHUP is ignored throughout exim, except when it is being
2054 signal(SIGINT, SIG_IGN);
2055 signal(SIGTERM, SIG_IGN);
2056 signal(SIGUSR1, SIG_IGN);
2058 /* Close the unwanted half of the pipe, and set close-on-exec for the other
2059 half - for transports that exec things (e.g. pipe). Then set the required
2062 (void)close(pfd[pipe_read]);
2063 (void)fcntl(pfd[pipe_write], F_SETFD, fcntl(pfd[pipe_write], F_GETFD) |
2065 exim_setugid(uid, gid, use_initgroups,
2066 string_sprintf("local delivery to %s <%s> transport=%s", addr->local_part,
2067 addr->address, addr->transport->name));
2071 address_item *batched;
2072 debug_printf(" home=%s current=%s\n", deliver_home, working_directory);
2073 for (batched = addr->next; batched; batched = batched->next)
2074 debug_printf("additional batched address: %s\n", batched->address);
2077 /* Set an appropriate working directory. */
2079 if (Uchdir(working_directory) < 0)
2081 addr->transport_return = DEFER;
2082 addr->basic_errno = errno;
2083 addr->message = string_sprintf("failed to chdir to %s", working_directory);
2086 /* If successful, call the transport */
2091 set_process_info("delivering %s to %s using %s", message_id,
2092 addr->local_part, addr->transport->name);
2094 /* Setting this global in the subprocess means we need never clear it */
2095 transport_name = addr->transport->name;
2097 /* If a transport filter has been specified, set up its argument list.
2098 Any errors will get put into the address, and FALSE yielded. */
2100 if (addr->transport->filter_command)
2102 ok = transport_set_up_command(&transport_filter_argv,
2103 addr->transport->filter_command,
2104 TRUE, PANIC, addr, US"transport filter", NULL);
2105 transport_filter_timeout = addr->transport->filter_timeout;
2107 else transport_filter_argv = NULL;
2111 debug_print_string(addr->transport->debug_string);
2112 replicate = !(addr->transport->info->code)(addr->transport, addr);
2116 /* Pass the results back down the pipe. If necessary, first replicate the
2117 status in the top address to the others in the batch. The label is the
2118 subject of a goto when a call to the transport's setup function fails. We
2119 pass the pointer to the transport back in case it got changed as a result of
2120 file_format in appendfile. */
2124 if (replicate) replicate_status(addr);
2125 for (addr2 = addr; addr2; addr2 = addr2->next)
2128 int local_part_length = Ustrlen(addr2->local_part);
2132 if( (ret = write(pfd[pipe_write], &addr2->transport_return, sizeof(int))) != sizeof(int)
2133 || (ret = write(pfd[pipe_write], &transport_count, sizeof(transport_count))) != sizeof(transport_count)
2134 || (ret = write(pfd[pipe_write], &addr2->flags, sizeof(addr2->flags))) != sizeof(addr2->flags)
2135 || (ret = write(pfd[pipe_write], &addr2->basic_errno, sizeof(int))) != sizeof(int)
2136 || (ret = write(pfd[pipe_write], &addr2->more_errno, sizeof(int))) != sizeof(int)
2137 || (ret = write(pfd[pipe_write], &addr2->special_action, sizeof(int))) != sizeof(int)
2138 || (ret = write(pfd[pipe_write], &addr2->transport,
2139 sizeof(transport_instance *))) != sizeof(transport_instance *)
2141 /* For a file delivery, pass back the local part, in case the original
2142 was only part of the final delivery path. This gives more complete
2145 || (testflag(addr2, af_file)
2146 && ( (ret = write(pfd[pipe_write], &local_part_length, sizeof(int))) != sizeof(int)
2147 || (ret = write(pfd[pipe_write], addr2->local_part, local_part_length)) != local_part_length
2151 log_write(0, LOG_MAIN|LOG_PANIC, "Failed writing transport results to pipe: %s\n",
2152 ret == -1 ? strerror(errno) : "short write");
2154 /* Now any messages */
2156 for (i = 0, s = addr2->message; i < 2; i++, s = addr2->user_message)
2158 int message_length = s ? Ustrlen(s) + 1 : 0;
2159 if( (ret = write(pfd[pipe_write], &message_length, sizeof(int))) != sizeof(int)
2160 || message_length > 0 && (ret = write(pfd[pipe_write], s, message_length)) != message_length
2162 log_write(0, LOG_MAIN|LOG_PANIC, "Failed writing transport results to pipe: %s\n",
2163 ret == -1 ? strerror(errno) : "short write");
2167 /* OK, this process is now done. Free any cached resources that it opened,
2168 and close the pipe we were writing down before exiting. */
2170 (void)close(pfd[pipe_write]);
2175 /* Back in the main process: panic if the fork did not succeed. This seems
2176 better than returning an error - if forking is failing it is probably best
2177 not to try other deliveries for this message. */
2180 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Fork failed for local delivery to %s",
2183 /* Read the pipe to get the delivery status codes and error messages. Our copy
2184 of the writing end must be closed first, as otherwise read() won't return zero
2185 on an empty pipe. We check that a status exists for each address before
2186 overwriting the address structure. If data is missing, the default DEFER status
2187 will remain. Afterwards, close the reading end. */
2189 (void)close(pfd[pipe_write]);
2191 for (addr2 = addr; addr2; addr2 = addr2->next)
2193 len = read(pfd[pipe_read], &status, sizeof(int));
2199 addr2->transport_return = status;
2200 len = read(pfd[pipe_read], &transport_count,
2201 sizeof(transport_count));
2202 len = read(pfd[pipe_read], &addr2->flags, sizeof(addr2->flags));
2203 len = read(pfd[pipe_read], &addr2->basic_errno, sizeof(int));
2204 len = read(pfd[pipe_read], &addr2->more_errno, sizeof(int));
2205 len = read(pfd[pipe_read], &addr2->special_action, sizeof(int));
2206 len = read(pfd[pipe_read], &addr2->transport,
2207 sizeof(transport_instance *));
2209 if (testflag(addr2, af_file))
2211 int local_part_length;
2212 len = read(pfd[pipe_read], &local_part_length, sizeof(int));
2213 len = read(pfd[pipe_read], big_buffer, local_part_length);
2214 big_buffer[local_part_length] = 0;
2215 addr2->local_part = string_copy(big_buffer);
2218 for (i = 0, sptr = &addr2->message; i < 2; i++, sptr = &addr2->user_message)
2221 len = read(pfd[pipe_read], &message_length, sizeof(int));
2222 if (message_length > 0)
2224 len = read(pfd[pipe_read], big_buffer, message_length);
2225 if (len > 0) *sptr = string_copy(big_buffer);
2232 log_write(0, LOG_MAIN|LOG_PANIC, "failed to read delivery status for %s "
2233 "from delivery subprocess", addr2->unique);
2238 (void)close(pfd[pipe_read]);
2240 /* Unless shadowing, write all successful addresses immediately to the journal
2241 file, to ensure they are recorded asap. For homonymic addresses, use the base
2242 address plus the transport name. Failure to write the journal is panic-worthy,
2243 but don't stop, as it may prove possible subsequently to update the spool file
2244 in order to record the delivery. */
2248 for (addr2 = addr; addr2; addr2 = addr2->next)
2249 if (addr2->transport_return == OK)
2251 if (testflag(addr2, af_homonym))
2252 sprintf(CS big_buffer, "%.500s/%s\n", addr2->unique + 3, tp->name);
2254 sprintf(CS big_buffer, "%.500s\n", addr2->unique);
2256 /* In the test harness, wait just a bit to let the subprocess finish off
2257 any debug output etc first. */
2259 if (running_in_test_harness) millisleep(300);
2261 DEBUG(D_deliver) debug_printf("journalling %s", big_buffer);
2262 len = Ustrlen(big_buffer);
2263 if (write(journal_fd, big_buffer, len) != len)
2264 log_write(0, LOG_MAIN|LOG_PANIC, "failed to update journal for %s: %s",
2265 big_buffer, strerror(errno));
2268 /* Ensure the journal file is pushed out to disk. */
2270 if (EXIMfsync(journal_fd) < 0)
2271 log_write(0, LOG_MAIN|LOG_PANIC, "failed to fsync journal: %s",
2275 /* Wait for the process to finish. If it terminates with a non-zero code,
2276 freeze the message (except for SIGTERM, SIGKILL and SIGQUIT), but leave the
2277 status values of all the addresses as they are. Take care to handle the case
2278 when the subprocess doesn't seem to exist. This has been seen on one system
2279 when Exim was called from an MUA that set SIGCHLD to SIG_IGN. When that
2280 happens, wait() doesn't recognize the termination of child processes. Exim now
2281 resets SIGCHLD to SIG_DFL, but this code should still be robust. */
2283 while ((rc = wait(&status)) != pid)
2284 if (rc < 0 && errno == ECHILD) /* Process has vanished */
2286 log_write(0, LOG_MAIN, "%s transport process vanished unexpectedly",
2287 addr->transport->driver_name);
2292 if ((status & 0xffff) != 0)
2294 int msb = (status >> 8) & 255;
2295 int lsb = status & 255;
2296 int code = (msb == 0)? (lsb & 0x7f) : msb;
2297 if (msb != 0 || (code != SIGTERM && code != SIGKILL && code != SIGQUIT))
2298 addr->special_action = SPECIAL_FREEZE;
2299 log_write(0, LOG_MAIN|LOG_PANIC, "%s transport process returned non-zero "
2300 "status 0x%04x: %s %d",
2301 addr->transport->driver_name,
2303 msb == 0 ? "terminated by signal" : "exit code",
2307 /* If SPECIAL_WARN is set in the top address, send a warning message. */
2309 if (addr->special_action == SPECIAL_WARN && addr->transport->warn_message)
2312 uschar *warn_message;
2315 DEBUG(D_deliver) debug_printf("Warning message requested by transport\n");
2317 if (!(warn_message = expand_string(addr->transport->warn_message)))
2318 log_write(0, LOG_MAIN|LOG_PANIC, "Failed to expand \"%s\" (warning "
2319 "message for %s transport): %s", addr->transport->warn_message,
2320 addr->transport->name, expand_string_message);
2322 else if ((pid = child_open_exim(&fd)) > 0)
2324 FILE *f = fdopen(fd, "wb");
2325 if (errors_reply_to && !contains_header(US"Reply-To", warn_message))
2326 fprintf(f, "Reply-To: %s\n", errors_reply_to);
2327 fprintf(f, "Auto-Submitted: auto-replied\n");
2328 if (!contains_header(US"From", warn_message))
2330 fprintf(f, "%s", CS warn_message);
2332 /* Close and wait for child process to complete, without a timeout. */
2335 (void)child_close(pid, 0);
2338 addr->special_action = SPECIAL_NONE;
2345 /* Check transport for the given concurrency limit. Return TRUE if over
2346 the limit (or an expansion failure), else FALSE and if there was a limit,
2347 the key for the hints database used for the concurrency count. */
2350 tpt_parallel_check(transport_instance * tp, address_item * addr, uschar ** key)
2352 unsigned max_parallel;
2354 if (!tp->max_parallel) return FALSE;
2356 max_parallel = (unsigned) expand_string_integer(tp->max_parallel, TRUE);
2357 if (expand_string_message)
2359 log_write(0, LOG_MAIN|LOG_PANIC, "Failed to expand max_parallel option "
2360 "in %s transport (%s): %s", tp->name, addr->address,
2361 expand_string_message);
2365 if (max_parallel > 0)
2367 uschar * serialize_key = string_sprintf("tpt-serialize-%s", tp->name);
2368 if (!enq_start(serialize_key, max_parallel))
2370 address_item * next;
2372 debug_printf("skipping tpt %s because concurrency limit %u reached\n",
2373 tp->name, max_parallel);
2377 addr->message = US"concurrency limit reached for transport";
2378 addr->basic_errno = ERRNO_TRETRY;
2379 post_process_one(addr, DEFER, LOG_MAIN, DTYPE_TRANSPORT, 0);
2380 } while ((addr = next));
2383 *key = serialize_key;
2390 /*************************************************
2391 * Do local deliveries *
2392 *************************************************/
2394 /* This function processes the list of addresses in addr_local. True local
2395 deliveries are always done one address at a time. However, local deliveries can
2396 be batched up in some cases. Typically this is when writing batched SMTP output
2397 files for use by some external transport mechanism, or when running local
2398 deliveries over LMTP.
2405 do_local_deliveries(void)
2408 open_db *dbm_file = NULL;
2409 time_t now = time(NULL);
2411 /* Loop until we have exhausted the supply of local deliveries */
2415 time_t delivery_start;
2417 address_item *addr2, *addr3, *nextaddr;
2418 int logflags = LOG_MAIN;
2419 int logchar = dont_deliver? '*' : '=';
2420 transport_instance *tp;
2421 uschar * serialize_key = NULL;
2423 /* Pick the first undelivered address off the chain */
2425 address_item *addr = addr_local;
2426 addr_local = addr->next;
2429 DEBUG(D_deliver|D_transport)
2430 debug_printf("--------> %s <--------\n", addr->address);
2432 /* An internal disaster if there is no transport. Should not occur! */
2434 if (!(tp = addr->transport))
2436 logflags |= LOG_PANIC;
2437 disable_logging = FALSE; /* Jic */
2438 addr->message = addr->router
2439 ? string_sprintf("No transport set by %s router", addr->router->name)
2440 : string_sprintf("No transport set by system filter");
2441 post_process_one(addr, DEFER, logflags, DTYPE_TRANSPORT, 0);
2445 /* Check that this base address hasn't previously been delivered to this
2446 transport. The check is necessary at this point to handle homonymic addresses
2447 correctly in cases where the pattern of redirection changes between delivery
2448 attempts. Non-homonymic previous delivery is detected earlier, at routing
2451 if (previously_transported(addr, FALSE)) continue;
2453 /* There are weird cases where logging is disabled */
2455 disable_logging = tp->disable_logging;
2457 /* Check for batched addresses and possible amalgamation. Skip all the work
2458 if either batch_max <= 1 or there aren't any other addresses for local
2461 if (tp->batch_max > 1 && addr_local)
2463 int batch_count = 1;
2464 BOOL uses_dom = readconf_depends((driver_instance *)tp, US"domain");
2465 BOOL uses_lp = ( testflag(addr, af_pfr)
2466 && (testflag(addr, af_file) || addr->local_part[0] == '|')
2468 || readconf_depends((driver_instance *)tp, US"local_part");
2469 uschar *batch_id = NULL;
2470 address_item **anchor = &addr_local;
2471 address_item *last = addr;
2474 /* Expand the batch_id string for comparison with other addresses.
2475 Expansion failure suppresses batching. */
2479 deliver_set_expansions(addr);
2480 batch_id = expand_string(tp->batch_id);
2481 deliver_set_expansions(NULL);
2484 log_write(0, LOG_MAIN|LOG_PANIC, "Failed to expand batch_id option "
2485 "in %s transport (%s): %s", tp->name, addr->address,
2486 expand_string_message);
2487 batch_count = tp->batch_max;
2491 /* Until we reach the batch_max limit, pick off addresses which have the
2492 same characteristics. These are:
2495 not previously delivered (see comment about 50 lines above)
2496 same local part if the transport's configuration contains $local_part
2497 or if this is a file or pipe delivery from a redirection
2498 same domain if the transport's configuration contains $domain
2500 same additional headers
2501 same headers to be removed
2502 same uid/gid for running the transport
2503 same first host if a host list is set
2506 while ((next = *anchor) && batch_count < tp->batch_max)
2509 tp == next->transport
2510 && !previously_transported(next, TRUE)
2511 && (addr->flags & (af_pfr|af_file)) == (next->flags & (af_pfr|af_file))
2512 && (!uses_lp || Ustrcmp(next->local_part, addr->local_part) == 0)
2513 && (!uses_dom || Ustrcmp(next->domain, addr->domain) == 0)
2514 && same_strings(next->prop.errors_address, addr->prop.errors_address)
2515 && same_headers(next->prop.extra_headers, addr->prop.extra_headers)
2516 && same_strings(next->prop.remove_headers, addr->prop.remove_headers)
2517 && same_ugid(tp, addr, next)
2518 && ( !addr->host_list && !next->host_list
2521 && Ustrcmp(addr->host_list->name, next->host_list->name) == 0
2524 /* If the transport has a batch_id setting, batch_id will be non-NULL
2525 from the expansion outside the loop. Expand for this address and compare.
2526 Expansion failure makes this address ineligible for batching. */
2531 address_item *save_nextnext = next->next;
2532 next->next = NULL; /* Expansion for a single address */
2533 deliver_set_expansions(next);
2534 next->next = save_nextnext;
2535 bid = expand_string(tp->batch_id);
2536 deliver_set_expansions(NULL);
2539 log_write(0, LOG_MAIN|LOG_PANIC, "Failed to expand batch_id option "
2540 "in %s transport (%s): %s", tp->name, next->address,
2541 expand_string_message);
2544 else ok = (Ustrcmp(batch_id, bid) == 0);
2547 /* Take address into batch if OK. */
2551 *anchor = next->next; /* Include the address */
2557 else anchor = &next->next; /* Skip the address */
2561 /* We now have one or more addresses that can be delivered in a batch. Check
2562 whether the transport is prepared to accept a message of this size. If not,
2563 fail them all forthwith. If the expansion fails, or does not yield an
2564 integer, defer delivery. */
2566 if (tp->message_size_limit)
2568 int rc = check_message_size(tp, addr);
2571 replicate_status(addr);
2575 post_process_one(addr, rc, logflags, DTYPE_TRANSPORT, 0);
2578 continue; /* With next batch of addresses */
2582 /* If we are not running the queue, or if forcing, all deliveries will be
2583 attempted. Otherwise, we must respect the retry times for each address. Even
2584 when not doing this, we need to set up the retry key string, and determine
2585 whether a retry record exists, because after a successful delivery, a delete
2586 retry item must be set up. Keep the retry database open only for the duration
2587 of these checks, rather than for all local deliveries, because some local
2588 deliveries (e.g. to pipes) can take a substantial time. */
2590 if (!(dbm_file = dbfn_open(US"retry", O_RDONLY, &dbblock, FALSE)))
2592 DEBUG(D_deliver|D_retry|D_hints_lookup)
2593 debug_printf("no retry data available\n");
2600 BOOL ok = TRUE; /* to deliver this address */
2603 /* Set up the retry key to include the domain or not, and change its
2604 leading character from "R" to "T". Must make a copy before doing this,
2605 because the old key may be pointed to from a "delete" retry item after
2608 retry_key = string_copy(
2609 tp->retry_use_local_part ? addr2->address_retry_key :
2610 addr2->domain_retry_key);
2613 /* Inspect the retry data. If there is no hints file, delivery happens. */
2617 dbdata_retry *retry_record = dbfn_read(dbm_file, retry_key);
2619 /* If there is no retry record, delivery happens. If there is,
2620 remember it exists so it can be deleted after a successful delivery. */
2624 setflag(addr2, af_lt_retry_exists);
2626 /* A retry record exists for this address. If queue running and not
2627 forcing, inspect its contents. If the record is too old, or if its
2628 retry time has come, or if it has passed its cutoff time, delivery
2633 debug_printf("retry record exists: age=%s ",
2634 readconf_printtime(now - retry_record->time_stamp));
2635 debug_printf("(max %s)\n", readconf_printtime(retry_data_expire));
2636 debug_printf(" time to retry = %s expired = %d\n",
2637 readconf_printtime(retry_record->next_try - now),
2638 retry_record->expired);
2641 if (queue_running && !deliver_force)
2643 ok = (now - retry_record->time_stamp > retry_data_expire)
2644 || (now >= retry_record->next_try)
2645 || retry_record->expired;
2647 /* If we haven't reached the retry time, there is one more check
2648 to do, which is for the ultimate address timeout. */
2651 ok = retry_ultimate_address_timeout(retry_key, addr2->domain,
2655 else DEBUG(D_retry) debug_printf("no retry record exists\n");
2658 /* This address is to be delivered. Leave it on the chain. */
2663 addr2 = addr2->next;
2666 /* This address is to be deferred. Take it out of the chain, and
2667 post-process it as complete. Must take it out of the chain first,
2668 because post processing puts it on another chain. */
2672 address_item *this = addr2;
2673 this->message = US"Retry time not yet reached";
2674 this->basic_errno = ERRNO_LRETRY;
2675 addr2 = addr3 ? (addr3->next = addr2->next)
2676 : (addr = addr2->next);
2677 post_process_one(this, DEFER, logflags, DTYPE_TRANSPORT, 0);
2681 if (dbm_file) dbfn_close(dbm_file);
2683 /* If there are no addresses left on the chain, they all deferred. Loop
2684 for the next set of addresses. */
2686 if (!addr) continue;
2688 /* If the transport is limited for parallellism, enforce that here.
2689 We use a hints DB entry, incremented here and decremented after
2690 the transport (and any shadow transport) completes. */
2692 if (tpt_parallel_check(tp, addr, &serialize_key))
2694 if (expand_string_message)
2696 logflags |= LOG_PANIC;
2700 post_process_one(addr, DEFER, logflags, DTYPE_TRANSPORT, 0);
2701 } while ((addr = addr2));
2703 continue; /* Loop for the next set of addresses. */
2707 /* So, finally, we do have some addresses that can be passed to the
2708 transport. Before doing so, set up variables that are relevant to a
2711 deliver_set_expansions(addr);
2712 delivery_start = time(NULL);
2713 deliver_local(addr, FALSE);
2714 deliver_time = (int)(time(NULL) - delivery_start);
2716 /* If a shadow transport (which must perforce be another local transport), is
2717 defined, and its condition is met, we must pass the message to the shadow
2718 too, but only those addresses that succeeded. We do this by making a new
2719 chain of addresses - also to keep the original chain uncontaminated. We must
2720 use a chain rather than doing it one by one, because the shadow transport may
2723 NOTE: if the condition fails because of a lookup defer, there is nothing we
2727 && ( !tp->shadow_condition
2728 || expand_check_condition(tp->shadow_condition, tp->name, US"transport")
2731 transport_instance *stp;
2732 address_item *shadow_addr = NULL;
2733 address_item **last = &shadow_addr;
2735 for (stp = transports; stp; stp = stp->next)
2736 if (Ustrcmp(stp->name, tp->shadow) == 0) break;
2739 log_write(0, LOG_MAIN|LOG_PANIC, "shadow transport \"%s\" not found ",
2742 /* Pick off the addresses that have succeeded, and make clones. Put into
2743 the shadow_message field a pointer to the shadow_message field of the real
2746 else for (addr2 = addr; addr2; addr2 = addr2->next)
2747 if (addr2->transport_return == OK)
2749 addr3 = store_get(sizeof(address_item));
2752 addr3->shadow_message = (uschar *) &(addr2->shadow_message);
2753 addr3->transport = stp;
2754 addr3->transport_return = DEFER;
2755 addr3->return_filename = NULL;
2756 addr3->return_file = -1;
2758 last = &(addr3->next);
2761 /* If we found any addresses to shadow, run the delivery, and stick any
2762 message back into the shadow_message field in the original. */
2766 int save_count = transport_count;
2768 DEBUG(D_deliver|D_transport)
2769 debug_printf(">>>>>>>>>>>>>>>> Shadow delivery >>>>>>>>>>>>>>>>\n");
2770 deliver_local(shadow_addr, TRUE);
2772 for(; shadow_addr; shadow_addr = shadow_addr->next)
2774 int sresult = shadow_addr->transport_return;
2775 *(uschar **)shadow_addr->shadow_message =
2777 ? string_sprintf(" ST=%s", stp->name)
2778 : string_sprintf(" ST=%s (%s%s%s)", stp->name,
2779 shadow_addr->basic_errno <= 0
2781 : US strerror(shadow_addr->basic_errno),
2782 shadow_addr->basic_errno <= 0 || !shadow_addr->message
2785 shadow_addr->message
2786 ? shadow_addr->message
2787 : shadow_addr->basic_errno <= 0
2791 DEBUG(D_deliver|D_transport)
2792 debug_printf("%s shadow transport returned %s for %s\n",
2794 sresult == OK ? "OK" :
2795 sresult == DEFER ? "DEFER" :
2796 sresult == FAIL ? "FAIL" :
2797 sresult == PANIC ? "PANIC" : "?",
2798 shadow_addr->address);
2801 DEBUG(D_deliver|D_transport)
2802 debug_printf(">>>>>>>>>>>>>>>> End shadow delivery >>>>>>>>>>>>>>>>\n");
2804 transport_count = save_count; /* Restore original transport count */
2808 /* Cancel the expansions that were set up for the delivery. */
2810 deliver_set_expansions(NULL);
2812 /* If the transport was parallelism-limited, decrement the hints DB record. */
2814 if (serialize_key) enq_end(serialize_key);
2816 /* Now we can process the results of the real transport. We must take each
2817 address off the chain first, because post_process_one() puts it on another
2820 for (addr2 = addr; addr2; addr2 = nextaddr)
2822 int result = addr2->transport_return;
2823 nextaddr = addr2->next;
2825 DEBUG(D_deliver|D_transport)
2826 debug_printf("%s transport returned %s for %s\n",
2828 result == OK ? "OK" :
2829 result == DEFER ? "DEFER" :
2830 result == FAIL ? "FAIL" :
2831 result == PANIC ? "PANIC" : "?",
2834 /* If there is a retry_record, or if delivery is deferred, build a retry
2835 item for setting a new retry time or deleting the old retry record from
2836 the database. These items are handled all together after all addresses
2837 have been handled (so the database is open just for a short time for
2840 if (result == DEFER || testflag(addr2, af_lt_retry_exists))
2842 int flags = result == DEFER ? 0 : rf_delete;
2843 uschar *retry_key = string_copy(tp->retry_use_local_part
2844 ? addr2->address_retry_key : addr2->domain_retry_key);
2846 retry_add_item(addr2, retry_key, flags);
2849 /* Done with this address */
2851 if (result == OK) addr2->more_errno = deliver_time;
2852 post_process_one(addr2, result, logflags, DTYPE_TRANSPORT, logchar);
2854 /* If a pipe delivery generated text to be sent back, the result may be
2855 changed to FAIL, and we must copy this for subsequent addresses in the
2858 if (addr2->transport_return != result)
2860 for (addr3 = nextaddr; addr3; addr3 = addr3->next)
2862 addr3->transport_return = addr2->transport_return;
2863 addr3->basic_errno = addr2->basic_errno;
2864 addr3->message = addr2->message;
2866 result = addr2->transport_return;
2869 /* Whether or not the result was changed to FAIL, we need to copy the
2870 return_file value from the first address into all the addresses of the
2871 batch, so they are all listed in the error message. */
2873 addr2->return_file = addr->return_file;
2875 /* Change log character for recording successful deliveries. */
2877 if (result == OK) logchar = '-';
2879 } /* Loop back for next batch of addresses */
2885 /*************************************************
2886 * Sort remote deliveries *
2887 *************************************************/
2889 /* This function is called if remote_sort_domains is set. It arranges that the
2890 chain of addresses for remote deliveries is ordered according to the strings
2891 specified. Try to make this shuffling reasonably efficient by handling
2892 sequences of addresses rather than just single ones.
2899 sort_remote_deliveries(void)
2902 address_item **aptr = &addr_remote;
2903 const uschar *listptr = remote_sort_domains;
2908 && (pattern = string_nextinlist(&listptr, &sep, patbuf, sizeof(patbuf)))
2911 address_item *moved = NULL;
2912 address_item **bptr = &moved;
2916 address_item **next;
2917 deliver_domain = (*aptr)->domain; /* set $domain */
2918 if (match_isinlist(deliver_domain, (const uschar **)&pattern, UCHAR_MAX+1,
2919 &domainlist_anchor, NULL, MCL_DOMAIN, TRUE, NULL) == OK)
2921 aptr = &(*aptr)->next;
2925 next = &(*aptr)->next;
2927 && (deliver_domain = (*next)->domain, /* Set $domain */
2928 match_isinlist(deliver_domain, (const uschar **)&pattern, UCHAR_MAX+1,
2929 &domainlist_anchor, NULL, MCL_DOMAIN, TRUE, NULL)) != OK
2931 next = &(*next)->next;
2933 /* If the batch of non-matchers is at the end, add on any that were
2934 extracted further up the chain, and end this iteration. Otherwise,
2935 extract them from the chain and hang on the moved chain. */
2947 aptr = &(*aptr)->next;
2950 /* If the loop ended because the final address matched, *aptr will
2951 be NULL. Add on to the end any extracted non-matching addresses. If
2952 *aptr is not NULL, the loop ended via "break" when *next is null, that
2953 is, there was a string of non-matching addresses at the end. In this
2954 case the extracted addresses have already been added on the end. */
2956 if (!*aptr) *aptr = moved;
2962 debug_printf("remote addresses after sorting:\n");
2963 for (addr = addr_remote; addr; addr = addr->next)
2964 debug_printf(" %s\n", addr->address);
2970 /*************************************************
2971 * Read from pipe for remote delivery subprocess *
2972 *************************************************/
2974 /* This function is called when the subprocess is complete, but can also be
2975 called before it is complete, in order to empty a pipe that is full (to prevent
2976 deadlock). It must therefore keep track of its progress in the parlist data
2979 We read the pipe to get the delivery status codes and a possible error message
2980 for each address, optionally preceded by unusability data for the hosts and
2981 also by optional retry data.
2983 Read in large chunks into the big buffer and then scan through, interpreting
2984 the data therein. In most cases, only a single read will be necessary. No
2985 individual item will ever be anywhere near 2500 bytes in length, so by ensuring
2986 that we read the next chunk when there is less than 2500 bytes left in the
2987 non-final chunk, we can assume each item is complete in the buffer before
2988 handling it. Each item is written using a single write(), which is atomic for
2989 small items (less than PIPE_BUF, which seems to be at least 512 in any Unix and
2990 often bigger) so even if we are reading while the subprocess is still going, we
2991 should never have only a partial item in the buffer.
2994 poffset the offset of the parlist item
2995 eop TRUE if the process has completed
2997 Returns: TRUE if the terminating 'Z' item has been read,
2998 or there has been a disaster (i.e. no more data needed);
3003 par_read_pipe(int poffset, BOOL eop)
3006 pardata *p = parlist + poffset;
3007 address_item *addrlist = p->addrlist;
3008 address_item *addr = p->addr;
3011 uschar *endptr = big_buffer;
3012 uschar *ptr = endptr;
3013 uschar *msg = p->msg;
3014 BOOL done = p->done;
3015 BOOL unfinished = TRUE;
3016 /* minimum size to read is header size including id, subid and length */
3017 int required = PIPE_HEADER_SIZE;
3019 /* Loop through all items, reading from the pipe when necessary. The pipe
3020 is set up to be non-blocking, but there are two different Unix mechanisms in
3021 use. Exim uses O_NONBLOCK if it is defined. This returns 0 for end of file,
3022 and EAGAIN for no more data. If O_NONBLOCK is not defined, Exim uses O_NDELAY,
3023 which returns 0 for both end of file and no more data. We distinguish the
3024 two cases by taking 0 as end of file only when we know the process has
3027 Each separate item is written to the pipe in a single write(), and as they are
3028 all short items, the writes will all be atomic and we should never find
3029 ourselves in the position of having read an incomplete item. "Short" in this
3030 case can mean up to about 1K in the case when there is a long error message
3031 associated with an address. */
3033 DEBUG(D_deliver) debug_printf("reading pipe for subprocess %d (%s)\n",
3034 (int)p->pid, eop? "ended" : "not ended");
3038 retry_item *r, **rp;
3039 int remaining = endptr - ptr;
3040 uschar header[PIPE_HEADER_SIZE + 1];
3044 /* Read (first time) or top up the chars in the buffer if necessary.
3045 There will be only one read if we get all the available data (i.e. don't
3046 fill the buffer completely). */
3048 if (remaining < required && unfinished)
3051 int available = big_buffer_size - remaining;
3053 if (remaining > 0) memmove(big_buffer, ptr, remaining);
3056 endptr = big_buffer + remaining;
3057 len = read(fd, endptr, available);
3059 DEBUG(D_deliver) debug_printf("read() yielded %d\n", len);
3061 /* If the result is EAGAIN and the process is not complete, just
3062 stop reading any more and process what we have already. */
3066 if (!eop && errno == EAGAIN) len = 0; else
3068 msg = string_sprintf("failed to read pipe from transport process "
3069 "%d for transport %s: %s", pid, addr->transport->driver_name,
3075 /* If the length is zero (eof or no-more-data), just process what we
3076 already have. Note that if the process is still running and we have
3077 read all the data in the pipe (but less that "available") then we
3078 won't read any more, as "unfinished" will get set FALSE. */
3082 unfinished = len == available;
3085 /* If we are at the end of the available data, exit the loop. */
3086 if (ptr >= endptr) break;
3088 /* copy and read header */
3089 memcpy(header, ptr, PIPE_HEADER_SIZE);
3090 header[PIPE_HEADER_SIZE] = '\0';
3093 required = Ustrtol(header + 2, &endc, 10) + PIPE_HEADER_SIZE; /* header + data */
3096 msg = string_sprintf("failed to read pipe from transport process "
3097 "%d for transport %s: error reading size from header", pid, addr->transport->driver_name);
3103 debug_printf("header read id:%c,subid:%c,size:%s,required:%d,remaining:%d,unfinished:%d\n",
3104 id, subid, header+2, required, remaining, unfinished);
3106 /* is there room for the dataset we want to read ? */
3107 if (required > big_buffer_size - PIPE_HEADER_SIZE)
3109 msg = string_sprintf("failed to read pipe from transport process "
3110 "%d for transport %s: big_buffer too small! required size=%d buffer size=%d", pid, addr->transport->driver_name,
3111 required, big_buffer_size - PIPE_HEADER_SIZE);
3116 /* we wrote all datasets with atomic write() calls
3117 remaining < required only happens if big_buffer was too small
3118 to get all available data from pipe. unfinished has to be true
3120 if (remaining < required)
3124 msg = string_sprintf("failed to read pipe from transport process "
3125 "%d for transport %s: required size=%d > remaining size=%d and unfinished=false",
3126 pid, addr->transport->driver_name, required, remaining);
3131 /* step behind the header */
3132 ptr += PIPE_HEADER_SIZE;
3134 /* Handle each possible type of item, assuming the complete item is
3135 available in store. */
3139 /* Host items exist only if any hosts were marked unusable. Match
3140 up by checking the IP address. */
3143 for (h = addrlist->host_list; h; h = h->next)
3145 if (!h->address || Ustrcmp(h->address, ptr+2) != 0) continue;
3153 /* Retry items are sent in a preceding R item for each address. This is
3154 kept separate to keep each message short enough to guarantee it won't
3155 be split in the pipe. Hopefully, in the majority of cases, there won't in
3156 fact be any retry items at all.
3158 The complete set of retry items might include an item to delete a
3159 routing retry if there was a previous routing delay. However, routing
3160 retries are also used when a remote transport identifies an address error.
3161 In that case, there may also be an "add" item for the same key. Arrange
3162 that a "delete" item is dropped in favour of an "add" item. */
3165 if (!addr) goto ADDR_MISMATCH;
3167 DEBUG(D_deliver|D_retry)
3168 debug_printf("reading retry information for %s from subprocess\n",
3171 /* Cut out any "delete" items on the list. */
3173 for (rp = &(addr->retries); (r = *rp); rp = &r->next)
3174 if (Ustrcmp(r->key, ptr+1) == 0) /* Found item with same key */
3176 if ((r->flags & rf_delete) == 0) break; /* It was not "delete" */
3177 *rp = r->next; /* Excise a delete item */
3178 DEBUG(D_deliver|D_retry)
3179 debug_printf(" existing delete item dropped\n");
3182 /* We want to add a delete item only if there is no non-delete item;
3183 however we still have to step ptr through the data. */
3185 if (!r || (*ptr & rf_delete) == 0)
3187 r = store_get(sizeof(retry_item));
3188 r->next = addr->retries;
3191 r->key = string_copy(ptr);
3193 memcpy(&(r->basic_errno), ptr, sizeof(r->basic_errno));
3194 ptr += sizeof(r->basic_errno);
3195 memcpy(&(r->more_errno), ptr, sizeof(r->more_errno));
3196 ptr += sizeof(r->more_errno);
3197 r->message = (*ptr)? string_copy(ptr) : NULL;
3198 DEBUG(D_deliver|D_retry)
3199 debug_printf(" added %s item\n",
3200 ((r->flags & rf_delete) == 0)? "retry" : "delete");
3205 DEBUG(D_deliver|D_retry)
3206 debug_printf(" delete item not added: non-delete item exists\n");
3209 ptr += sizeof(r->basic_errno) + sizeof(r->more_errno);
3215 /* Put the amount of data written into the parlist block */
3218 memcpy(&(p->transport_count), ptr, sizeof(transport_count));
3219 ptr += sizeof(transport_count);
3222 /* Address items are in the order of items on the address chain. We
3223 remember the current address value in case this function is called
3224 several times to empty the pipe in stages. Information about delivery
3225 over TLS is sent in a preceding X item for each address. We don't put
3226 it in with the other info, in order to keep each message short enough to
3227 guarantee it won't be split in the pipe. */
3231 if (!addr) goto ADDR_MISMATCH; /* Below, in 'A' handler */
3235 addr->cipher = NULL;
3236 addr->peerdn = NULL;
3239 addr->cipher = string_copy(ptr);
3242 addr->peerdn = string_copy(ptr);
3247 (void) tls_import_cert(ptr, &addr->peercert);
3249 addr->peercert = NULL;
3254 (void) tls_import_cert(ptr, &addr->ourcert);
3256 addr->ourcert = NULL;
3259 # ifndef DISABLE_OCSP
3261 addr->ocsp = OCSP_NOT_REQ;
3263 addr->ocsp = *ptr - '0';
3269 #endif /*SUPPORT_TLS*/
3271 case 'C': /* client authenticator information */
3275 addr->authenticator = (*ptr)? string_copy(ptr) : NULL;
3278 addr->auth_id = (*ptr)? string_copy(ptr) : NULL;
3281 addr->auth_sndr = (*ptr)? string_copy(ptr) : NULL;
3287 #ifndef DISABLE_PRDR
3289 addr->flags |= af_prdr_used;
3294 if (!addr) goto ADDR_MISMATCH;
3295 memcpy(&(addr->dsn_aware), ptr, sizeof(addr->dsn_aware));
3296 ptr += sizeof(addr->dsn_aware);
3297 DEBUG(D_deliver) debug_printf("DSN read: addr->dsn_aware = %d\n", addr->dsn_aware);
3304 msg = string_sprintf("address count mismatch for data read from pipe "
3305 "for transport process %d for transport %s", pid,
3306 addrlist->transport->driver_name);
3313 #ifdef SUPPORT_SOCKS
3314 case '2': /* proxy information; must arrive before A0 and applies to that addr XXX oops*/
3315 proxy_session = TRUE; /*XXX shouod this be cleared somewhere? */
3320 proxy_local_address = string_copy(ptr);
3322 memcpy(&proxy_local_port, ptr, sizeof(proxy_local_port));
3323 ptr += sizeof(proxy_local_port);
3328 #ifdef EXPERIMENTAL_DSN_INFO
3329 case '1': /* must arrive before A0, and applies to that addr */
3330 /* Two strings: smtp_greeting and helo_response */
3331 addr->smtp_greeting = string_copy(ptr);
3333 addr->helo_response = string_copy(ptr);
3339 addr->transport_return = *ptr++;
3340 addr->special_action = *ptr++;
3341 memcpy(&(addr->basic_errno), ptr, sizeof(addr->basic_errno));
3342 ptr += sizeof(addr->basic_errno);
3343 memcpy(&(addr->more_errno), ptr, sizeof(addr->more_errno));
3344 ptr += sizeof(addr->more_errno);
3345 memcpy(&(addr->flags), ptr, sizeof(addr->flags));
3346 ptr += sizeof(addr->flags);
3347 addr->message = (*ptr)? string_copy(ptr) : NULL;
3349 addr->user_message = (*ptr)? string_copy(ptr) : NULL;
3352 /* Always two strings for host information, followed by the port number and DNSSEC mark */
3356 h = store_get(sizeof(host_item));
3357 h->name = string_copy(ptr);
3359 h->address = string_copy(ptr);
3361 memcpy(&(h->port), ptr, sizeof(h->port));
3362 ptr += sizeof(h->port);
3363 h->dnssec = *ptr == '2' ? DS_YES
3364 : *ptr == '1' ? DS_NO
3367 addr->host_used = h;
3371 /* Finished with this address */
3378 /* Local interface address/port */
3380 if (*ptr) sending_ip_address = string_copy(ptr);
3382 if (*ptr) sending_port = atoi(CS ptr);
3386 /* Z marks the logical end of the data. It is followed by '0' if
3387 continue_transport was NULL at the end of transporting, otherwise '1'.
3388 We need to know when it becomes NULL during a delivery down a passed SMTP
3389 channel so that we don't try to pass anything more down it. Of course, for
3390 most normal messages it will remain NULL all the time. */
3395 continue_transport = NULL;
3396 continue_hostname = NULL;
3399 DEBUG(D_deliver) debug_printf("Z0%c item read\n", *ptr);
3402 /* Anything else is a disaster. */
3405 msg = string_sprintf("malformed data (%d) read from pipe for transport "
3406 "process %d for transport %s", ptr[-1], pid,
3407 addr->transport->driver_name);
3413 /* The done flag is inspected externally, to determine whether or not to
3414 call the function again when the process finishes. */
3418 /* If the process hadn't finished, and we haven't seen the end of the data
3419 or suffered a disaster, update the rest of the state, and return FALSE to
3420 indicate "not finished". */
3429 /* Close our end of the pipe, to prevent deadlock if the far end is still
3430 pushing stuff into it. */
3435 /* If we have finished without error, but haven't had data for every address,
3436 something is wrong. */
3439 msg = string_sprintf("insufficient address data read from pipe "
3440 "for transport process %d for transport %s", pid,
3441 addr->transport->driver_name);
3443 /* If an error message is set, something has gone wrong in getting back
3444 the delivery data. Put the message into each address and freeze it. */
3447 for (addr = addrlist; addr; addr = addr->next)
3449 addr->transport_return = DEFER;
3450 addr->special_action = SPECIAL_FREEZE;
3451 addr->message = msg;
3454 /* Return TRUE to indicate we have got all we need from this process, even
3455 if it hasn't actually finished yet. */
3462 /*************************************************
3463 * Post-process a set of remote addresses *
3464 *************************************************/
3466 /* Do what has to be done immediately after a remote delivery for each set of
3467 addresses, then re-write the spool if necessary. Note that post_process_one
3468 puts the address on an appropriate queue; hence we must fish off the next
3469 one first. This function is also called if there is a problem with setting
3470 up a subprocess to do a remote delivery in parallel. In this case, the final
3471 argument contains a message, and the action must be forced to DEFER.
3474 addr pointer to chain of address items
3475 logflags flags for logging
3476 msg NULL for normal cases; -> error message for unexpected problems
3477 fallback TRUE if processing fallback hosts
3483 remote_post_process(address_item *addr, int logflags, uschar *msg,
3488 /* If any host addresses were found to be unusable, add them to the unusable
3489 tree so that subsequent deliveries don't try them. */
3491 for (h = addr->host_list; h; h = h->next)
3493 if (h->status >= hstatus_unusable) tree_add_unusable(h);
3495 /* Now handle each address on the chain. The transport has placed '=' or '-'
3496 into the special_action field for each successful delivery. */
3500 address_item *next = addr->next;
3502 /* If msg == NULL (normal processing) and the result is DEFER and we are
3503 processing the main hosts and there are fallback hosts available, put the
3504 address on the list for fallback delivery. */
3506 if ( addr->transport_return == DEFER
3507 && addr->fallback_hosts
3512 addr->host_list = addr->fallback_hosts;
3513 addr->next = addr_fallback;
3514 addr_fallback = addr;
3515 DEBUG(D_deliver) debug_printf("%s queued for fallback host(s)\n", addr->address);
3518 /* If msg is set (=> unexpected problem), set it in the address before
3519 doing the ordinary post processing. */
3525 addr->message = msg;
3526 addr->transport_return = DEFER;
3528 (void)post_process_one(addr, addr->transport_return, logflags,
3529 DTYPE_TRANSPORT, addr->special_action);
3537 /* If we have just delivered down a passed SMTP channel, and that was
3538 the last address, the channel will have been closed down. Now that
3539 we have logged that delivery, set continue_sequence to 1 so that
3540 any subsequent deliveries don't get "*" incorrectly logged. */
3542 if (!continue_transport) continue_sequence = 1;
3547 /*************************************************
3548 * Wait for one remote delivery subprocess *
3549 *************************************************/
3551 /* This function is called while doing remote deliveries when either the
3552 maximum number of processes exist and we need one to complete so that another
3553 can be created, or when waiting for the last ones to complete. It must wait for
3554 the completion of one subprocess, empty the control block slot, and return a
3555 pointer to the address chain.
3558 Returns: pointer to the chain of addresses handled by the process;
3559 NULL if no subprocess found - this is an unexpected error
3562 static address_item *
3565 int poffset, status;
3566 address_item *addr, *addrlist;
3569 set_process_info("delivering %s: waiting for a remote delivery subprocess "
3570 "to finish", message_id);
3572 /* Loop until either a subprocess completes, or there are no subprocesses in
3573 existence - in which case give an error return. We cannot proceed just by
3574 waiting for a completion, because a subprocess may have filled up its pipe, and
3575 be waiting for it to be emptied. Therefore, if no processes have finished, we
3576 wait for one of the pipes to acquire some data by calling select(), with a
3577 timeout just in case.
3579 The simple approach is just to iterate after reading data from a ready pipe.
3580 This leads to non-ideal behaviour when the subprocess has written its final Z
3581 item, closed the pipe, and is in the process of exiting (the common case). A
3582 call to waitpid() yields nothing completed, but select() shows the pipe ready -
3583 reading it yields EOF, so you end up with busy-waiting until the subprocess has
3586 To avoid this, if all the data that is needed has been read from a subprocess
3587 after select(), an explicit wait() for it is done. We know that all it is doing
3588 is writing to the pipe and then exiting, so the wait should not be long.
3590 The non-blocking waitpid() is to some extent just insurance; if we could
3591 reliably detect end-of-file on the pipe, we could always know when to do a
3592 blocking wait() for a completed process. However, because some systems use
3593 NDELAY, which doesn't distinguish between EOF and pipe empty, it is easier to
3594 use code that functions without the need to recognize EOF.
3596 There's a double loop here just in case we end up with a process that is not in
3597 the list of remote delivery processes. Something has obviously gone wrong if
3598 this is the case. (For example, a process that is incorrectly left over from
3599 routing or local deliveries might be found.) The damage can be minimized by
3600 looping back and looking for another process. If there aren't any, the error
3601 return will happen. */
3603 for (;;) /* Normally we do not repeat this loop */
3605 while ((pid = waitpid(-1, &status, WNOHANG)) <= 0)
3608 fd_set select_pipes;
3609 int maxpipe, readycount;
3611 /* A return value of -1 can mean several things. If errno != ECHILD, it
3612 either means invalid options (which we discount), or that this process was
3613 interrupted by a signal. Just loop to try the waitpid() again.
3615 If errno == ECHILD, waitpid() is telling us that there are no subprocesses
3616 in existence. This should never happen, and is an unexpected error.
3617 However, there is a nasty complication when running under Linux. If "strace
3618 -f" is being used under Linux to trace this process and its children,
3619 subprocesses are "stolen" from their parents and become the children of the
3620 tracing process. A general wait such as the one we've just obeyed returns
3621 as if there are no children while subprocesses are running. Once a
3622 subprocess completes, it is restored to the parent, and waitpid(-1) finds
3623 it. Thanks to Joachim Wieland for finding all this out and suggesting a
3626 This does not happen using "truss" on Solaris, nor (I think) with other
3627 tracing facilities on other OS. It seems to be specific to Linux.
3629 What we do to get round this is to use kill() to see if any of our
3630 subprocesses are still in existence. If kill() gives an OK return, we know
3631 it must be for one of our processes - it can't be for a re-use of the pid,
3632 because if our process had finished, waitpid() would have found it. If any
3633 of our subprocesses are in existence, we proceed to use select() as if
3634 waitpid() had returned zero. I think this is safe. */
3638 if (errno != ECHILD) continue; /* Repeats the waitpid() */
3641 debug_printf("waitpid() returned -1/ECHILD: checking explicitly "
3642 "for process existence\n");
3644 for (poffset = 0; poffset < remote_max_parallel; poffset++)
3646 if ((pid = parlist[poffset].pid) != 0 && kill(pid, 0) == 0)
3648 DEBUG(D_deliver) debug_printf("process %d still exists: assume "
3649 "stolen by strace\n", (int)pid);
3650 break; /* With poffset set */
3654 if (poffset >= remote_max_parallel)
3656 DEBUG(D_deliver) debug_printf("*** no delivery children found\n");
3657 return NULL; /* This is the error return */
3661 /* A pid value greater than 0 breaks the "while" loop. A negative value has
3662 been handled above. A return value of zero means that there is at least one
3663 subprocess, but there are no completed subprocesses. See if any pipes are
3664 ready with any data for reading. */
3666 DEBUG(D_deliver) debug_printf("selecting on subprocess pipes\n");
3669 FD_ZERO(&select_pipes);
3670 for (poffset = 0; poffset < remote_max_parallel; poffset++)
3672 if (parlist[poffset].pid != 0)
3674 int fd = parlist[poffset].fd;
3675 FD_SET(fd, &select_pipes);
3676 if (fd > maxpipe) maxpipe = fd;
3680 /* Stick in a 60-second timeout, just in case. */
3685 readycount = select(maxpipe + 1, (SELECT_ARG2_TYPE *)&select_pipes,
3688 /* Scan through the pipes and read any that are ready; use the count
3689 returned by select() to stop when there are no more. Select() can return
3690 with no processes (e.g. if interrupted). This shouldn't matter.
3692 If par_read_pipe() returns TRUE, it means that either the terminating Z was
3693 read, or there was a disaster. In either case, we are finished with this
3694 process. Do an explicit wait() for the process and break the main loop if
3697 It turns out that we have to deal with the case of an interrupted system
3698 call, which can happen on some operating systems if the signal handling is
3699 set up to do that by default. */
3702 readycount > 0 && poffset < remote_max_parallel;
3705 if ( (pid = parlist[poffset].pid) != 0
3706 && FD_ISSET(parlist[poffset].fd, &select_pipes)
3710 if (par_read_pipe(poffset, FALSE)) /* Finished with this pipe */
3712 for (;;) /* Loop for signals */
3714 pid_t endedpid = waitpid(pid, &status, 0);
3715 if (endedpid == pid) goto PROCESS_DONE;
3716 if (endedpid != (pid_t)(-1) || errno != EINTR)
3717 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Unexpected error return "
3718 "%d (errno = %d) from waitpid() for process %d",
3719 (int)endedpid, errno, (int)pid);
3725 /* Now go back and look for a completed subprocess again. */
3728 /* A completed process was detected by the non-blocking waitpid(). Find the
3729 data block that corresponds to this subprocess. */
3731 for (poffset = 0; poffset < remote_max_parallel; poffset++)
3732 if (pid == parlist[poffset].pid) break;
3734 /* Found the data block; this is a known remote delivery process. We don't
3735 need to repeat the outer loop. This should be what normally happens. */
3737 if (poffset < remote_max_parallel) break;
3739 /* This situation is an error, but it's probably better to carry on looking
3740 for another process than to give up (as we used to do). */
3742 log_write(0, LOG_MAIN|LOG_PANIC, "Process %d finished: not found in remote "
3743 "transport process list", pid);
3744 } /* End of the "for" loop */
3746 /* Come here when all the data was completely read after a select(), and
3747 the process in pid has been wait()ed for. */
3754 debug_printf("remote delivery process %d ended\n", (int)pid);
3756 debug_printf("remote delivery process %d ended: status=%04x\n", (int)pid,
3760 set_process_info("delivering %s", message_id);
3762 /* Get the chain of processed addresses */
3764 addrlist = parlist[poffset].addrlist;
3766 /* If the process did not finish cleanly, record an error and freeze (except
3767 for SIGTERM, SIGKILL and SIGQUIT), and also ensure the journal is not removed,
3768 in case the delivery did actually happen. */
3770 if ((status & 0xffff) != 0)
3773 int msb = (status >> 8) & 255;
3774 int lsb = status & 255;
3775 int code = (msb == 0)? (lsb & 0x7f) : msb;
3777 msg = string_sprintf("%s transport process returned non-zero status 0x%04x: "
3779 addrlist->transport->driver_name,
3781 (msb == 0)? "terminated by signal" : "exit code",
3784 if (msb != 0 || (code != SIGTERM && code != SIGKILL && code != SIGQUIT))
3785 addrlist->special_action = SPECIAL_FREEZE;
3787 for (addr = addrlist; addr; addr = addr->next)
3789 addr->transport_return = DEFER;
3790 addr->message = msg;
3793 remove_journal = FALSE;
3796 /* Else complete reading the pipe to get the result of the delivery, if all
3797 the data has not yet been obtained. */
3799 else if (!parlist[poffset].done) (void)par_read_pipe(poffset, TRUE);
3801 /* Put the data count and return path into globals, mark the data slot unused,
3802 decrement the count of subprocesses, and return the address chain. */
3804 transport_count = parlist[poffset].transport_count;
3805 used_return_path = parlist[poffset].return_path;
3806 parlist[poffset].pid = 0;
3813 /*************************************************
3814 * Wait for subprocesses and post-process *
3815 *************************************************/
3817 /* This function waits for subprocesses until the number that are still running
3818 is below a given threshold. For each complete subprocess, the addresses are
3819 post-processed. If we can't find a running process, there is some shambles.
3820 Better not bomb out, as that might lead to multiple copies of the message. Just
3821 log and proceed as if all done.
3824 max maximum number of subprocesses to leave running
3825 fallback TRUE if processing fallback hosts
3831 par_reduce(int max, BOOL fallback)
3833 while (parcount > max)
3835 address_item *doneaddr = par_wait();
3838 log_write(0, LOG_MAIN|LOG_PANIC,
3839 "remote delivery process count got out of step");
3844 transport_instance * tp = doneaddr->transport;
3845 if (tp->max_parallel)
3846 enq_end(string_sprintf("tpt-serialize-%s", tp->name));
3848 remote_post_process(doneaddr, LOG_MAIN, NULL, fallback);
3857 rmt_dlv_checked_write(int fd, char id, char subid, void * buf, int size)
3859 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 int ret = write(fd, writebuffer, size);
3892 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Failed writing transport result to pipe: %s\n",
3893 ret == -1 ? strerror(errno) : "short write");
3896 /*************************************************
3897 * Do remote deliveries *
3898 *************************************************/
3900 /* This function is called to process the addresses in addr_remote. We must
3901 pick off the queue all addresses that have the same transport, remote
3902 destination, and errors address, and hand them to the transport in one go,
3903 subject to some configured limitations. If this is a run to continue delivering
3904 to an existing delivery channel, skip all but those addresses that can go to
3905 that channel. The skipped addresses just get deferred.
3907 If mua_wrapper is set, all addresses must be able to be sent in a single
3908 transaction. If not, this function yields FALSE.
3910 In Exim 4, remote deliveries are always done in separate processes, even
3911 if remote_max_parallel = 1 or if there's only one delivery to do. The reason
3912 is so that the base process can retain privilege. This makes the
3913 implementation of fallback transports feasible (though not initially done.)
3915 We create up to the configured number of subprocesses, each of which passes
3916 back the delivery state via a pipe. (However, when sending down an existing
3917 connection, remote_max_parallel is forced to 1.)
3920 fallback TRUE if processing fallback hosts
3922 Returns: TRUE normally
3923 FALSE if mua_wrapper is set and the addresses cannot all be sent
3928 do_remote_deliveries(BOOL fallback)
3934 parcount = 0; /* Number of executing subprocesses */
3936 /* When sending down an existing channel, only do one delivery at a time.
3937 We use a local variable (parmax) to hold the maximum number of processes;
3938 this gets reduced from remote_max_parallel if we can't create enough pipes. */
3940 if (continue_transport) remote_max_parallel = 1;
3941 parmax = remote_max_parallel;
3943 /* If the data for keeping a list of processes hasn't yet been
3948 parlist = store_get(remote_max_parallel * sizeof(pardata));
3949 for (poffset = 0; poffset < remote_max_parallel; poffset++)
3950 parlist[poffset].pid = 0;
3953 /* Now loop for each remote delivery */
3955 for (delivery_count = 0; addr_remote; delivery_count++)
3961 int address_count = 1;
3962 int address_count_max;
3964 BOOL use_initgroups;
3965 BOOL pipe_done = FALSE;
3966 transport_instance *tp;
3967 address_item **anchor = &addr_remote;
3968 address_item *addr = addr_remote;
3969 address_item *last = addr;
3972 uschar * serialize_key = NULL;
3974 /* Pull the first address right off the list. */
3976 addr_remote = addr->next;
3979 DEBUG(D_deliver|D_transport)
3980 debug_printf("--------> %s <--------\n", addr->address);
3982 /* If no transport has been set, there has been a big screw-up somewhere. */
3984 if (!(tp = addr->transport))
3986 disable_logging = FALSE; /* Jic */
3987 panicmsg = US"No transport set by router";
3988 goto panic_continue;
3991 /* Check that this base address hasn't previously been delivered to this
3992 transport. The check is necessary at this point to handle homonymic addresses
3993 correctly in cases where the pattern of redirection changes between delivery
3994 attempts. Non-homonymic previous delivery is detected earlier, at routing
3997 if (previously_transported(addr, FALSE)) continue;
3999 /* Force failure if the message is too big. */
4001 if (tp->message_size_limit)
4003 int rc = check_message_size(tp, addr);
4006 addr->transport_return = rc;
4007 remote_post_process(addr, LOG_MAIN, NULL, fallback);
4012 /* Get the flag which specifies whether the transport can handle different
4013 domains that nevertheless resolve to the same set of hosts. If it needs
4014 expanding, get variables set: $address_data, $domain_data, $localpart_data,
4015 $host, $host_address, $host_port. */
4016 if (tp->expand_multi_domain)
4017 deliver_set_expansions(addr);
4019 if (exp_bool(addr, US"transport", tp->name, D_transport,
4020 US"multi_domain", tp->multi_domain, tp->expand_multi_domain,
4021 &multi_domain) != OK)
4023 deliver_set_expansions(NULL);
4024 panicmsg = addr->message;
4025 goto panic_continue;
4028 /* Get the maximum it can handle in one envelope, with zero meaning
4029 unlimited, which is forced for the MUA wrapper case. */
4031 address_count_max = tp->max_addresses;
4032 if (address_count_max == 0 || mua_wrapper) address_count_max = 999999;
4035 /************************************************************************/
4036 /***** This is slightly experimental code, but should be safe. *****/
4038 /* The address_count_max value is the maximum number of addresses that the
4039 transport can send in one envelope. However, the transport must be capable of
4040 dealing with any number of addresses. If the number it gets exceeds its
4041 envelope limitation, it must send multiple copies of the message. This can be
4042 done over a single connection for SMTP, so uses less resources than making
4043 multiple connections. On the other hand, if remote_max_parallel is greater
4044 than one, it is perhaps a good idea to use parallel processing to move the
4045 message faster, even if that results in multiple simultaneous connections to
4048 How can we come to some compromise between these two ideals? What we do is to
4049 limit the number of addresses passed to a single instance of a transport to
4050 the greater of (a) its address limit (rcpt_max for SMTP) and (b) the total
4051 number of addresses routed to remote transports divided by
4052 remote_max_parallel. For example, if the message has 100 remote recipients,
4053 remote max parallel is 2, and rcpt_max is 10, we'd never send more than 50 at
4054 once. But if rcpt_max is 100, we could send up to 100.
4056 Of course, not all the remotely addresses in a message are going to go to the
4057 same set of hosts (except in smarthost configurations), so this is just a
4058 heuristic way of dividing up the work.
4060 Furthermore (1), because this may not be wanted in some cases, and also to
4061 cope with really pathological cases, there is also a limit to the number of
4062 messages that are sent over one connection. This is the same limit that is
4063 used when sending several different messages over the same connection.
4064 Continue_sequence is set when in this situation, to the number sent so
4065 far, including this message.
4067 Furthermore (2), when somebody explicitly sets the maximum value to 1, it
4068 is probably because they are using VERP, in which case they want to pass only
4069 one address at a time to the transport, in order to be able to use
4070 $local_part and $domain in constructing a new return path. We could test for
4071 the use of these variables, but as it is so likely they will be used when the
4072 maximum is 1, we don't bother. Just leave the value alone. */
4074 if ( address_count_max != 1
4075 && address_count_max < remote_delivery_count/remote_max_parallel
4078 int new_max = remote_delivery_count/remote_max_parallel;
4079 int message_max = tp->connection_max_messages;
4080 if (connection_max_messages >= 0) message_max = connection_max_messages;
4081 message_max -= continue_sequence - 1;
4082 if (message_max > 0 && new_max > address_count_max * message_max)
4083 new_max = address_count_max * message_max;
4084 address_count_max = new_max;
4087 /************************************************************************/
4090 /* Pick off all addresses which have the same transport, errors address,
4091 destination, and extra headers. In some cases they point to the same host
4092 list, but we also need to check for identical host lists generated from
4093 entirely different domains. The host list pointers can be NULL in the case
4094 where the hosts are defined in the transport. There is also a configured
4095 maximum limit of addresses that can be handled at once (see comments above
4096 for how it is computed).
4097 If the transport does not handle multiple domains, enforce that also,
4098 and if it might need a per-address check for this, re-evaluate it.
4101 while ((next = *anchor) && address_count < address_count_max)
4104 if ( (multi_domain || Ustrcmp(next->domain, addr->domain) == 0)
4105 && tp == next->transport
4106 && same_hosts(next->host_list, addr->host_list)
4107 && same_strings(next->prop.errors_address, addr->prop.errors_address)
4108 && same_headers(next->prop.extra_headers, addr->prop.extra_headers)
4109 && same_ugid(tp, next, addr)
4110 && ( next->prop.remove_headers == addr->prop.remove_headers
4111 || ( next->prop.remove_headers
4112 && addr->prop.remove_headers
4113 && Ustrcmp(next->prop.remove_headers, addr->prop.remove_headers) == 0
4117 !tp->expand_multi_domain || (deliver_set_expansions(next), 1),
4119 US"transport", next->transport->name, D_transport,
4120 US"multi_domain", next->transport->multi_domain,
4121 next->transport->expand_multi_domain, &md) == OK
4126 *anchor = next->next;
4128 next->first = addr; /* remember top one (for retry processing) */
4133 else anchor = &(next->next);
4134 deliver_set_expansions(NULL);
4137 /* If we are acting as an MUA wrapper, all addresses must go in a single
4138 transaction. If not, put them back on the chain and yield FALSE. */
4140 if (mua_wrapper && addr_remote)
4142 last->next = addr_remote;
4147 /* If the transport is limited for parallellism, enforce that here.
4148 The hints DB entry is decremented in par_reduce(), when we reap the
4149 transport process. */
4151 if (tpt_parallel_check(tp, addr, &serialize_key))
4152 if ((panicmsg = expand_string_message))
4153 goto panic_continue;
4155 continue; /* Loop for the next set of addresses. */
4157 /* Set up the expansion variables for this set of addresses */
4159 deliver_set_expansions(addr);
4161 /* Ensure any transport-set auth info is fresh */
4162 addr->authenticator = addr->auth_id = addr->auth_sndr = NULL;
4164 /* Compute the return path, expanding a new one if required. The old one
4165 must be set first, as it might be referred to in the expansion. */
4167 if(addr->prop.errors_address)
4168 return_path = addr->prop.errors_address;
4169 #ifdef EXPERIMENTAL_SRS
4170 else if(addr->prop.srs_sender)
4171 return_path = addr->prop.srs_sender;
4174 return_path = sender_address;
4176 if (tp->return_path)
4178 uschar *new_return_path = expand_string(tp->return_path);
4179 if (new_return_path)
4180 return_path = new_return_path;
4181 else if (!expand_string_forcedfail)
4183 panicmsg = string_sprintf("Failed to expand return path \"%s\": %s",
4184 tp->return_path, expand_string_message);
4189 /* Find the uid, gid, and use_initgroups setting for this transport. Failure
4190 logs and sets up error messages, so we just post-process and continue with
4191 the next address. */
4193 if (!findugid(addr, tp, &uid, &gid, &use_initgroups))
4199 /* If this transport has a setup function, call it now so that it gets
4200 run in this process and not in any subprocess. That way, the results of
4201 any setup that are retained by the transport can be reusable. One of the
4202 things the setup does is to set the fallback host lists in the addresses.
4203 That is why it is called at this point, before the continue delivery
4204 processing, because that might use the fallback hosts. */
4207 (void)((tp->setup)(addr->transport, addr, NULL, uid, gid, NULL));
4209 /* If this is a run to continue delivery down an already-established
4210 channel, check that this set of addresses matches the transport and
4211 the channel. If it does not, defer the addresses. If a host list exists,
4212 we must check that the continue host is on the list. Otherwise, the
4213 host is set in the transport. */
4215 continue_more = FALSE; /* In case got set for the last lot */
4216 if (continue_transport)
4218 BOOL ok = Ustrcmp(continue_transport, tp->name) == 0;
4219 if (ok && addr->host_list)
4223 for (h = addr->host_list; h; h = h->next)
4224 if (Ustrcmp(h->name, continue_hostname) == 0)
4225 { ok = TRUE; break; }
4228 /* Addresses not suitable; defer or queue for fallback hosts (which
4229 might be the continue host) and skip to next address. */
4233 DEBUG(D_deliver) debug_printf("not suitable for continue_transport\n");
4234 if (serialize_key) enq_end(serialize_key);
4236 if (addr->fallback_hosts && !fallback)
4238 for (next = addr; ; next = next->next)
4240 next->host_list = next->fallback_hosts;
4241 DEBUG(D_deliver) debug_printf("%s queued for fallback host(s)\n", next->address);
4242 if (!next->next) break;
4244 next->next = addr_fallback;
4245 addr_fallback = addr;
4250 while (next->next) next = next->next;
4251 next->next = addr_defer;
4258 /* Set a flag indicating whether there are further addresses that list
4259 the continued host. This tells the transport to leave the channel open,
4260 but not to pass it to another delivery process. */
4262 for (next = addr_remote; next; next = next->next)
4265 for (h = next->host_list; h; h = h->next)
4266 if (Ustrcmp(h->name, continue_hostname) == 0)
4267 { continue_more = TRUE; break; }
4271 /* The transports set up the process info themselves as they may connect
4272 to more than one remote machine. They also have to set up the filter
4273 arguments, if required, so that the host name and address are available
4276 transport_filter_argv = NULL;
4278 /* Create the pipe for inter-process communication. If pipe creation
4279 fails, it is probably because the value of remote_max_parallel is so
4280 large that too many file descriptors for pipes have been created. Arrange
4281 to wait for a process to finish, and then try again. If we still can't
4282 create a pipe when all processes have finished, break the retry loop. */
4286 if (pipe(pfd) == 0) pipe_done = TRUE;
4287 else if (parcount > 0) parmax = parcount;
4290 /* We need to make the reading end of the pipe non-blocking. There are
4291 two different options for this. Exim is cunningly (I hope!) coded so
4292 that it can use either of them, though it prefers O_NONBLOCK, which
4293 distinguishes between EOF and no-more-data. */
4296 (void)fcntl(pfd[pipe_read], F_SETFL, O_NONBLOCK);
4298 (void)fcntl(pfd[pipe_read], F_SETFL, O_NDELAY);
4301 /* If the maximum number of subprocesses already exist, wait for a process
4302 to finish. If we ran out of file descriptors, parmax will have been reduced
4303 from its initial value of remote_max_parallel. */
4305 par_reduce(parmax - 1, fallback);
4308 /* If we failed to create a pipe and there were no processes to wait
4309 for, we have to give up on this one. Do this outside the above loop
4310 so that we can continue the main loop. */
4314 panicmsg = string_sprintf("unable to create pipe: %s", strerror(errno));
4318 /* Find a free slot in the pardata list. Must do this after the possible
4319 waiting for processes to finish, because a terminating process will free
4322 for (poffset = 0; poffset < remote_max_parallel; poffset++)
4323 if (parlist[poffset].pid == 0)
4326 /* If there isn't one, there has been a horrible disaster. */
4328 if (poffset >= remote_max_parallel)
4330 (void)close(pfd[pipe_write]);
4331 (void)close(pfd[pipe_read]);
4332 panicmsg = US"Unexpectedly no free subprocess slot";
4336 /* Now fork a subprocess to do the remote delivery, but before doing so,
4337 ensure that any cached resourses are released so as not to interfere with
4338 what happens in the subprocess. */
4342 if ((pid = fork()) == 0)
4344 int fd = pfd[pipe_write];
4347 /* Setting this global in the subprocess means we need never clear it */
4348 transport_name = tp->name;
4350 /* There are weird circumstances in which logging is disabled */
4351 disable_logging = tp->disable_logging;
4353 /* Show pids on debug output if parallelism possible */
4355 if (parmax > 1 && (parcount > 0 || addr_remote))
4357 DEBUG(D_any|D_v) debug_selector |= D_pid;
4358 DEBUG(D_deliver) debug_printf("Remote delivery process started\n");
4361 /* Reset the random number generator, so different processes don't all
4362 have the same sequence. In the test harness we want different, but
4363 predictable settings for each delivery process, so do something explicit
4364 here rather they rely on the fixed reset in the random number function. */
4366 random_seed = running_in_test_harness? 42 + 2*delivery_count : 0;
4368 /* Set close-on-exec on the pipe so that it doesn't get passed on to
4369 a new process that may be forked to do another delivery down the same
4372 (void)fcntl(fd, F_SETFD, fcntl(fd, F_GETFD) | FD_CLOEXEC);
4374 /* Close open file descriptors for the pipes of other processes
4375 that are running in parallel. */
4377 for (poffset = 0; poffset < remote_max_parallel; poffset++)
4378 if (parlist[poffset].pid != 0) (void)close(parlist[poffset].fd);
4380 /* This process has inherited a copy of the file descriptor
4381 for the data file, but its file pointer is shared with all the
4382 other processes running in parallel. Therefore, we have to re-open
4383 the file in order to get a new file descriptor with its own
4384 file pointer. We don't need to lock it, as the lock is held by
4385 the parent process. There doesn't seem to be any way of doing
4386 a dup-with-new-file-pointer. */
4388 (void)close(deliver_datafile);
4389 sprintf(CS spoolname, "%s/input/%s/%s-D", spool_directory, message_subdir,
4391 deliver_datafile = Uopen(spoolname, O_RDWR | O_APPEND, 0);
4393 if (deliver_datafile < 0)
4394 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Failed to reopen %s for remote "
4395 "parallel delivery: %s", spoolname, strerror(errno));
4397 /* Set the close-on-exec flag */
4399 (void)fcntl(deliver_datafile, F_SETFD, fcntl(deliver_datafile, F_GETFD) |
4402 /* Set the uid/gid of this process; bombs out on failure. */
4404 exim_setugid(uid, gid, use_initgroups,
4405 string_sprintf("remote delivery to %s with transport=%s",
4406 addr->address, tp->name));
4408 /* Close the unwanted half of this process' pipe, set the process state,
4409 and run the transport. Afterwards, transport_count will contain the number
4410 of bytes written. */
4412 (void)close(pfd[pipe_read]);
4413 set_process_info("delivering %s using %s", message_id, tp->name);
4414 debug_print_string(tp->debug_string);
4415 if (!(tp->info->code)(addr->transport, addr)) replicate_status(addr);
4417 set_process_info("delivering %s (just run %s for %s%s in subprocess)",
4418 message_id, tp->name, addr->address, addr->next ? ", ..." : "");
4420 /* Ensure any cached resources that we used are now released */
4424 /* Pass the result back down the pipe. This is a lot more information
4425 than is needed for a local delivery. We have to send back the error
4426 status for each address, the usability status for each host that is
4427 flagged as unusable, and all the retry items. When TLS is in use, we
4428 send also the cipher and peerdn information. Each type of information
4429 is flagged by an identifying byte, and is then in a fixed format (with
4430 strings terminated by zeros), and there is a final terminator at the
4431 end. The host information and retry information is all attached to
4432 the first address, so that gets sent at the start. */
4434 /* Host unusability information: for most success cases this will
4437 for (h = addr->host_list; h; h = h->next)
4439 if (!h->address || h->status < hstatus_unusable) continue;
4440 sprintf(CS big_buffer, "%c%c%s", h->status, h->why, h->address);
4441 rmt_dlv_checked_write(fd, 'H', '0', big_buffer, Ustrlen(big_buffer+2) + 3);
4444 /* The number of bytes written. This is the same for each address. Even
4445 if we sent several copies of the message down the same connection, the
4446 size of each one is the same, and it's that value we have got because
4447 transport_count gets reset before calling transport_write_message(). */
4449 memcpy(big_buffer, &transport_count, sizeof(transport_count));
4450 rmt_dlv_checked_write(fd, 'S', '0', big_buffer, sizeof(transport_count));
4452 /* Information about what happened to each address. Four item types are
4453 used: an optional 'X' item first, for TLS information, then an optional "C"
4454 item for any client-auth info followed by 'R' items for any retry settings,
4455 and finally an 'A' item for the remaining data. */
4457 for(; addr; addr = addr->next)
4462 /* The certificate verification status goes into the flags */
4463 if (tls_out.certificate_verified) setflag(addr, af_cert_verified);
4464 #ifdef EXPERIMENTAL_DANE
4465 if (tls_out.dane_verified) setflag(addr, af_dane_verified);
4468 /* Use an X item only if there's something to send */
4472 ptr = big_buffer + sprintf(CS big_buffer, "%.128s", addr->cipher) + 1;
4477 ptr += sprintf(CS ptr, "%.512s", addr->peerdn);
4481 rmt_dlv_checked_write(fd, 'X', '1', big_buffer, ptr - big_buffer);
4486 if (!tls_export_cert(ptr, big_buffer_size-2, addr->peercert))
4490 rmt_dlv_checked_write(fd, 'X', '2', big_buffer, ptr - big_buffer);
4495 if (!tls_export_cert(ptr, big_buffer_size-2, addr->ourcert))
4499 rmt_dlv_checked_write(fd, 'X', '3', big_buffer, ptr - big_buffer);
4501 # ifndef DISABLE_OCSP
4502 if (addr->ocsp > OCSP_NOT_REQ)
4504 ptr = big_buffer + sprintf(CS big_buffer, "%c", addr->ocsp + '0') + 1;
4505 rmt_dlv_checked_write(fd, 'X', '4', big_buffer, ptr - big_buffer);
4508 #endif /*SUPPORT_TLS*/
4510 if (client_authenticator)
4512 ptr = big_buffer + sprintf(CS big_buffer, "%.64s", client_authenticator) + 1;
4513 rmt_dlv_checked_write(fd, 'C', '1', big_buffer, ptr - big_buffer);
4515 if (client_authenticated_id)
4517 ptr = big_buffer + sprintf(CS big_buffer, "%.64s", client_authenticated_id) + 1;
4518 rmt_dlv_checked_write(fd, 'C', '2', big_buffer, ptr - big_buffer);
4520 if (client_authenticated_sender)
4522 ptr = big_buffer + sprintf(CS big_buffer, "%.64s", client_authenticated_sender) + 1;
4523 rmt_dlv_checked_write(fd, 'C', '3', big_buffer, ptr - big_buffer);
4526 #ifndef DISABLE_PRDR
4527 if (addr->flags & af_prdr_used)
4528 rmt_dlv_checked_write(fd, 'P', '0', NULL, 0);
4531 memcpy(big_buffer, &addr->dsn_aware, sizeof(addr->dsn_aware));
4532 rmt_dlv_checked_write(fd, 'D', '0', big_buffer, sizeof(addr->dsn_aware));
4533 DEBUG(D_deliver) debug_printf("DSN write: addr->dsn_aware = %d\n", addr->dsn_aware);
4535 /* Retry information: for most success cases this will be null. */
4537 for (r = addr->retries; r; r = r->next)
4539 sprintf(CS big_buffer, "%c%.500s", r->flags, r->key);
4540 ptr = big_buffer + Ustrlen(big_buffer+2) + 3;
4541 memcpy(ptr, &(r->basic_errno), sizeof(r->basic_errno));
4542 ptr += sizeof(r->basic_errno);
4543 memcpy(ptr, &(r->more_errno), sizeof(r->more_errno));
4544 ptr += sizeof(r->more_errno);
4545 if (!r->message) *ptr++ = 0; else
4547 sprintf(CS ptr, "%.512s", r->message);
4550 rmt_dlv_checked_write(fd, 'R', '0', big_buffer, ptr - big_buffer);
4553 #ifdef SUPPORT_SOCKS
4554 if (LOGGING(proxy) && proxy_session)
4557 if (proxy_local_address)
4559 DEBUG(D_deliver) debug_printf("proxy_local_address '%s'\n", proxy_local_address);
4560 ptr = big_buffer + sprintf(CS ptr, "%.128s", proxy_local_address) + 1;
4561 DEBUG(D_deliver) debug_printf("proxy_local_port %d\n", proxy_local_port);
4562 memcpy(ptr, &proxy_local_port, sizeof(proxy_local_port));
4563 ptr += sizeof(proxy_local_port);
4567 rmt_dlv_checked_write(fd, 'A', '2', big_buffer, ptr - big_buffer);
4571 #ifdef EXPERIMENTAL_DSN_INFO
4572 /*um, are they really per-addr? Other per-conn stuff is not (auth, tls). But host_used is! */
4573 if (addr->smtp_greeting)
4575 DEBUG(D_deliver) debug_printf("smtp_greeting '%s'\n", addr->smtp_greeting);
4576 ptr = big_buffer + sprintf(CS big_buffer, "%.128s", addr->smtp_greeting) + 1;
4577 if (addr->helo_response)
4579 DEBUG(D_deliver) debug_printf("helo_response '%s'\n", addr->helo_response);
4580 ptr += sprintf(CS ptr, "%.128s", addr->helo_response) + 1;
4584 rmt_dlv_checked_write(fd, 'A', '1', big_buffer, ptr - big_buffer);
4588 /* The rest of the information goes in an 'A0' item. */
4590 sprintf(CS big_buffer, "%c%c", addr->transport_return, addr->special_action);
4591 ptr = big_buffer + 2;
4592 memcpy(ptr, &(addr->basic_errno), sizeof(addr->basic_errno));
4593 ptr += sizeof(addr->basic_errno);
4594 memcpy(ptr, &(addr->more_errno), sizeof(addr->more_errno));
4595 ptr += sizeof(addr->more_errno);
4596 memcpy(ptr, &(addr->flags), sizeof(addr->flags));
4597 ptr += sizeof(addr->flags);
4599 if (!addr->message) *ptr++ = 0; else
4600 ptr += sprintf(CS ptr, "%.1024s", addr->message) + 1;
4602 if (!addr->user_message) *ptr++ = 0; else
4603 ptr += sprintf(CS ptr, "%.1024s", addr->user_message) + 1;
4605 if (!addr->host_used) *ptr++ = 0; else
4607 ptr += sprintf(CS ptr, "%.256s", addr->host_used->name) + 1;
4608 ptr += sprintf(CS ptr, "%.64s", addr->host_used->address) + 1;
4609 memcpy(ptr, &(addr->host_used->port), sizeof(addr->host_used->port));
4610 ptr += sizeof(addr->host_used->port);
4612 /* DNS lookup status */
4613 *ptr++ = addr->host_used->dnssec==DS_YES ? '2'
4614 : addr->host_used->dnssec==DS_NO ? '1' : '0';
4617 rmt_dlv_checked_write(fd, 'A', '0', big_buffer, ptr - big_buffer);
4620 /* Local interface address/port */
4621 #ifdef EXPERIMENTAL_DSN_INFO
4622 if (sending_ip_address)
4624 if (LOGGING(incoming_interface) && sending_ip_address)
4628 ptr = big_buffer + sprintf(CS big_buffer, "%.128s", sending_ip_address) + 1;
4629 ptr += sprintf(CS ptr, "%d", sending_port) + 1;
4630 rmt_dlv_checked_write(fd, 'I', '0', big_buffer, ptr - big_buffer);
4633 /* Add termination flag, close the pipe, and that's it. The character
4634 after 'Z' indicates whether continue_transport is now NULL or not.
4635 A change from non-NULL to NULL indicates a problem with a continuing
4638 big_buffer[0] = continue_transport ? '1' : '0';
4639 rmt_dlv_checked_write(fd, 'Z', '0', big_buffer, 1);
4644 /* Back in the mainline: close the unwanted half of the pipe. */
4646 (void)close(pfd[pipe_write]);
4648 /* Fork failed; defer with error message */
4652 (void)close(pfd[pipe_read]);
4653 panicmsg = string_sprintf("fork failed for remote delivery to %s: %s",
4654 addr->domain, strerror(errno));
4658 /* Fork succeeded; increment the count, and remember relevant data for
4659 when the process finishes. */
4662 parlist[poffset].addrlist = parlist[poffset].addr = addr;
4663 parlist[poffset].pid = pid;
4664 parlist[poffset].fd = pfd[pipe_read];
4665 parlist[poffset].done = FALSE;
4666 parlist[poffset].msg = NULL;
4667 parlist[poffset].return_path = return_path;
4669 /* If the process we've just started is sending a message down an existing
4670 channel, wait for it now. This ensures that only one such process runs at
4671 once, whatever the value of remote_max parallel. Otherwise, we might try to
4672 send two or more messages simultaneously down the same channel. This could
4673 happen if there are different domains that include the same host in otherwise
4674 different host lists.
4676 Also, if the transport closes down the channel, this information gets back
4677 (continue_transport gets set to NULL) before we consider any other addresses
4680 if (continue_transport) par_reduce(0, fallback);
4682 /* Otherwise, if we are running in the test harness, wait a bit, to let the
4683 newly created process get going before we create another process. This should
4684 ensure repeatability in the tests. We only need to wait a tad. */
4686 else if (running_in_test_harness) millisleep(500);
4691 if (serialize_key) enq_end(serialize_key);
4693 remote_post_process(addr, LOG_MAIN|LOG_PANIC, panicmsg, fallback);
4697 /* Reached the end of the list of addresses. Wait for all the subprocesses that
4698 are still running and post-process their addresses. */
4700 par_reduce(0, fallback);
4707 /*************************************************
4708 * Split an address into local part and domain *
4709 *************************************************/
4711 /* This function initializes an address for routing by splitting it up into a
4712 local part and a domain. The local part is set up twice - once in its original
4713 casing, and once in lower case, and it is dequoted. We also do the "percent
4714 hack" for configured domains. This may lead to a DEFER result if a lookup
4715 defers. When a percent-hacking takes place, we insert a copy of the original
4716 address as a new parent of this address, as if we have had a redirection.
4719 addr points to an addr_item block containing the address
4722 DEFER - could not determine if domain is %-hackable
4726 deliver_split_address(address_item *addr)
4728 uschar *address = addr->address;
4729 uschar *domain = Ustrrchr(address, '@');
4731 int len = domain - address;
4733 addr->domain = string_copylc(domain+1); /* Domains are always caseless */
4735 /* The implication in the RFCs (though I can't say I've seen it spelled out
4736 explicitly) is that quoting should be removed from local parts at the point
4737 where they are locally interpreted. [The new draft "821" is more explicit on
4738 this, Jan 1999.] We know the syntax is valid, so this can be done by simply
4739 removing quoting backslashes and any unquoted doublequotes. */
4741 t = addr->cc_local_part = store_get(len+1);
4744 register int c = *address++;
4745 if (c == '\"') continue;
4755 /* We do the percent hack only for those domains that are listed in
4756 percent_hack_domains. A loop is required, to copy with multiple %-hacks. */
4758 if (percent_hack_domains)
4761 uschar *new_address = NULL;
4762 uschar *local_part = addr->cc_local_part;
4764 deliver_domain = addr->domain; /* set $domain */
4766 while ( (rc = match_isinlist(deliver_domain, (const uschar **)&percent_hack_domains, 0,
4767 &domainlist_anchor, addr->domain_cache, MCL_DOMAIN, TRUE, NULL))
4769 && (t = Ustrrchr(local_part, '%')) != NULL
4772 new_address = string_copy(local_part);
4773 new_address[t - local_part] = '@';
4774 deliver_domain = string_copylc(t+1);
4775 local_part = string_copyn(local_part, t - local_part);
4778 if (rc == DEFER) return DEFER; /* lookup deferred */
4780 /* If hackery happened, set up new parent and alter the current address. */
4784 address_item *new_parent = store_get(sizeof(address_item));
4785 *new_parent = *addr;
4786 addr->parent = new_parent;
4787 addr->address = new_address;
4788 addr->unique = string_copy(new_address);
4789 addr->domain = deliver_domain;
4790 addr->cc_local_part = local_part;
4791 DEBUG(D_deliver) debug_printf("%%-hack changed address to: %s\n",
4796 /* Create the lowercased version of the final local part, and make that the
4797 default one to be used. */
4799 addr->local_part = addr->lc_local_part = string_copylc(addr->cc_local_part);
4806 /*************************************************
4807 * Get next error message text *
4808 *************************************************/
4810 /* If f is not NULL, read the next "paragraph", from a customized error message
4811 text file, terminated by a line containing ****, and expand it.
4814 f NULL or a file to read from
4815 which string indicating which string (for errors)
4817 Returns: NULL or an expanded string
4821 next_emf(FILE *f, uschar *which)
4825 uschar *para, *yield;
4828 if (!f) return NULL;
4830 if (!Ufgets(buffer, sizeof(buffer), f) || Ustrcmp(buffer, "****\n") == 0)
4833 para = store_get(size);
4836 para = string_cat(para, &size, &ptr, buffer, Ustrlen(buffer));
4837 if (!Ufgets(buffer, sizeof(buffer), f) || Ustrcmp(buffer, "****\n") == 0)
4842 if ((yield = expand_string(para)))
4845 log_write(0, LOG_MAIN|LOG_PANIC, "Failed to expand string from "
4846 "bounce_message_file or warn_message_file (%s): %s", which,
4847 expand_string_message);
4854 /*************************************************
4855 * Close down a passed transport channel *
4856 *************************************************/
4858 /* This function is called when a passed transport channel cannot be used.
4859 It attempts to close it down tidily. The yield is always DELIVER_NOT_ATTEMPTED
4860 so that the function call can be the argument of a "return" statement.
4863 Returns: DELIVER_NOT_ATTEMPTED
4867 continue_closedown(void)
4869 if (continue_transport)
4871 transport_instance *t;
4872 for (t = transports; t; t = t->next)
4873 if (Ustrcmp(t->name, continue_transport) == 0)
4875 if (t->info->closedown) (t->info->closedown)(t);
4879 return DELIVER_NOT_ATTEMPTED;
4885 /*************************************************
4886 * Print address information *
4887 *************************************************/
4889 /* This function is called to output an address, or information about an
4890 address, for bounce or defer messages. If the hide_child flag is set, all we
4891 output is the original ancestor address.
4894 addr points to the address
4895 f the FILE to print to
4896 si an initial string
4897 sc a continuation string for before "generated"
4900 Returns: TRUE if the address is not hidden
4904 print_address_information(address_item *addr, FILE *f, uschar *si, uschar *sc,
4908 uschar *printed = US"";
4909 address_item *ancestor = addr;
4910 while (ancestor->parent) ancestor = ancestor->parent;
4912 fprintf(f, "%s", CS si);
4914 if (addr->parent && testflag(addr, af_hide_child))
4916 printed = US"an undisclosed address";
4919 else if (!testflag(addr, af_pfr) || !addr->parent)
4920 printed = addr->address;
4924 uschar *s = addr->address;
4927 if (addr->address[0] == '>') { ss = US"mail"; s++; }
4928 else if (addr->address[0] == '|') ss = US"pipe";
4931 fprintf(f, "%s to %s%sgenerated by ", ss, s, sc);
4932 printed = addr->parent->address;
4935 fprintf(f, "%s", CS string_printing(printed));
4937 if (ancestor != addr)
4939 uschar *original = ancestor->onetime_parent;
4940 if (!original) original= ancestor->address;
4941 if (strcmpic(original, printed) != 0)
4942 fprintf(f, "%s(%sgenerated from %s)", sc,
4943 ancestor != addr->parent ? "ultimately " : "",
4944 string_printing(original));
4947 if (addr->host_used)
4948 fprintf(f, "\n host %s [%s]",
4949 addr->host_used->name, addr->host_used->address);
4951 fprintf(f, "%s", CS se);
4959 /*************************************************
4960 * Print error for an address *
4961 *************************************************/
4963 /* This function is called to print the error information out of an address for
4964 a bounce or a warning message. It tries to format the message reasonably by
4965 introducing newlines. All lines are indented by 4; the initial printing
4966 position must be set before calling.
4968 This function used always to print the error. Nowadays we want to restrict it
4969 to cases such as LMTP/SMTP errors from a remote host, and errors from :fail:
4970 and filter "fail". We no longer pass other information willy-nilly in bounce
4971 and warning messages. Text in user_message is always output; text in message
4972 only if the af_pass_message flag is set.
4976 f the FILE to print on
4983 print_address_error(address_item *addr, FILE *f, uschar *t)
4985 int count = Ustrlen(t);
4986 uschar *s = testflag(addr, af_pass_message)? addr->message : NULL;
4988 if (!s && !(s = addr->user_message))
4991 fprintf(f, "\n %s", t);
4994 if (*s == '\\' && s[1] == 'n')
5004 if (*s++ == ':' && isspace(*s) && count > 45)
5006 fprintf(f, "\n "); /* sic (because space follows) */
5013 /***********************************************************
5014 * Print Diagnostic-Code for an address *
5015 ************************************************************/
5017 /* This function is called to print the error information out of an address for
5018 a bounce or a warning message. It tries to format the message reasonably as
5019 required by RFC 3461 by adding a space after each newline
5021 it uses the same logic as print_address_error() above. if af_pass_message is true
5022 and addr->message is set it uses the remote host answer. if not addr->user_message
5023 is used instead if available.
5027 f the FILE to print on
5033 print_dsn_diagnostic_code(const address_item *addr, FILE *f)
5035 uschar *s = testflag(addr, af_pass_message) ? addr->message : NULL;
5037 /* af_pass_message and addr->message set ? print remote host answer */
5041 debug_printf("DSN Diagnostic-Code: addr->message = %s\n", addr->message);
5043 /* search first ": ". we assume to find the remote-MTA answer there */
5044 if (!(s = Ustrstr(addr->message, ": ")))
5045 return; /* not found, bail out */
5046 s += 2; /* skip ": " */
5047 fprintf(f, "Diagnostic-Code: smtp; ");
5049 /* no message available. do nothing */
5053 if (*s == '\\' && s[1] == 'n')
5055 fputs("\n ", f); /* as defined in RFC 3461 */
5065 /*************************************************
5066 * Check list of addresses for duplication *
5067 *************************************************/
5069 /* This function was introduced when the test for duplicate addresses that are
5070 not pipes, files, or autoreplies was moved from the middle of routing to when
5071 routing was complete. That was to fix obscure cases when the routing history
5072 affects the subsequent routing of identical addresses. This function is called
5073 after routing, to check that the final routed addresses are not duplicates.
5075 If we detect a duplicate, we remember what it is a duplicate of. Note that
5076 pipe, file, and autoreply de-duplication is handled during routing, so we must
5077 leave such "addresses" alone here, as otherwise they will incorrectly be
5080 Argument: address of list anchor
5085 do_duplicate_check(address_item **anchor)
5088 while ((addr = *anchor))
5091 if (testflag(addr, af_pfr))
5093 anchor = &(addr->next);
5095 else if ((tnode = tree_search(tree_duplicates, addr->unique)))
5097 DEBUG(D_deliver|D_route)
5098 debug_printf("%s is a duplicate address: discarded\n", addr->unique);
5099 *anchor = addr->next;
5100 addr->dupof = tnode->data.ptr;
5101 addr->next = addr_duplicate;
5102 addr_duplicate = addr;
5106 tree_add_duplicate(addr->unique, addr);
5107 anchor = &(addr->next);
5115 /*************************************************
5116 * Deliver one message *
5117 *************************************************/
5119 /* This is the function which is called when a message is to be delivered. It
5120 is passed the id of the message. It is possible that the message no longer
5121 exists, if some other process has delivered it, and it is also possible that
5122 the message is being worked on by another process, in which case the data file
5125 If no delivery is attempted for any of the above reasons, the function returns
5126 DELIVER_NOT_ATTEMPTED.
5128 If the give_up flag is set true, do not attempt any deliveries, but instead
5129 fail all outstanding addresses and return the message to the sender (or
5132 A delivery operation has a process all to itself; we never deliver more than
5133 one message in the same process. Therefore we needn't worry too much about
5137 id the id of the message to be delivered
5138 forced TRUE if delivery was forced by an administrator; this overrides
5139 retry delays and causes a delivery to be tried regardless
5140 give_up TRUE if an administrator has requested that delivery attempts
5143 Returns: When the global variable mua_wrapper is FALSE:
5144 DELIVER_ATTEMPTED_NORMAL if a delivery attempt was made
5145 DELIVER_NOT_ATTEMPTED otherwise (see comment above)
5146 When the global variable mua_wrapper is TRUE:
5147 DELIVER_MUA_SUCCEEDED if delivery succeeded
5148 DELIVER_MUA_FAILED if delivery failed
5149 DELIVER_NOT_ATTEMPTED if not attempted (should not occur)
5153 deliver_message(uschar *id, BOOL forced, BOOL give_up)
5156 int final_yield = DELIVER_ATTEMPTED_NORMAL;
5157 time_t now = time(NULL);
5158 address_item *addr_last = NULL;
5159 uschar *filter_message = NULL;
5161 int process_recipients = RECIP_ACCEPT;
5164 extern int acl_where;
5166 uschar *info = queue_run_pid == (pid_t)0
5167 ? string_sprintf("delivering %s", id)
5168 : string_sprintf("delivering %s (queue run pid %d)", id, queue_run_pid);
5170 /* If the D_process_info bit is on, set_process_info() will output debugging
5171 information. If not, we want to show this initial information if D_deliver or
5172 D_queue_run is set or in verbose mode. */
5174 set_process_info("%s", info);
5176 if ( !(debug_selector & D_process_info)
5177 && (debug_selector & (D_deliver|D_queue_run|D_v))
5179 debug_printf("%s\n", info);
5181 /* Ensure that we catch any subprocesses that are created. Although Exim
5182 sets SIG_DFL as its initial default, some routes through the code end up
5183 here with it set to SIG_IGN - cases where a non-synchronous delivery process
5184 has been forked, but no re-exec has been done. We use sigaction rather than
5185 plain signal() on those OS where SA_NOCLDWAIT exists, because we want to be
5186 sure it is turned off. (There was a problem on AIX with this.) */
5190 struct sigaction act;
5191 act.sa_handler = SIG_DFL;
5192 sigemptyset(&(act.sa_mask));
5194 sigaction(SIGCHLD, &act, NULL);
5197 signal(SIGCHLD, SIG_DFL);
5200 /* Make the forcing flag available for routers and transports, set up the
5201 global message id field, and initialize the count for returned files and the
5202 message size. This use of strcpy() is OK because the length id is checked when
5203 it is obtained from a command line (the -M or -q options), and otherwise it is
5204 known to be a valid message id. */
5206 Ustrcpy(message_id, id);
5207 deliver_force = forced;
5211 /* Initialize some flags */
5213 update_spool = FALSE;
5214 remove_journal = TRUE;
5216 /* Set a known context for any ACLs we call via expansions */
5217 acl_where = ACL_WHERE_DELIVERY;
5219 /* Reset the random number generator, so that if several delivery processes are
5220 started from a queue runner that has already used random numbers (for sorting),
5221 they don't all get the same sequence. */
5225 /* Open and lock the message's data file. Exim locks on this one because the
5226 header file may get replaced as it is re-written during the delivery process.
5227 Any failures cause messages to be written to the log, except for missing files
5228 while queue running - another process probably completed delivery. As part of
5229 opening the data file, message_subdir gets set. */
5231 if (!spool_open_datafile(id))
5232 return continue_closedown(); /* yields DELIVER_NOT_ATTEMPTED */
5234 /* The value of message_size at this point has been set to the data length,
5235 plus one for the blank line that notionally precedes the data. */
5237 /* Now read the contents of the header file, which will set up the headers in
5238 store, and also the list of recipients and the tree of non-recipients and
5239 assorted flags. It updates message_size. If there is a reading or format error,
5240 give up; if the message has been around for sufficiently long, remove it. */
5242 sprintf(CS spoolname, "%s-H", id);
5243 if ((rc = spool_read_header(spoolname, TRUE, TRUE)) != spool_read_OK)
5245 if (errno == ERRNO_SPOOLFORMAT)
5247 struct stat statbuf;
5248 sprintf(CS big_buffer, "%s/input/%s/%s", spool_directory, message_subdir,
5250 if (Ustat(big_buffer, &statbuf) == 0)
5251 log_write(0, LOG_MAIN, "Format error in spool file %s: "
5252 "size=" OFF_T_FMT, spoolname, statbuf.st_size);
5253 else log_write(0, LOG_MAIN, "Format error in spool file %s", spoolname);
5256 log_write(0, LOG_MAIN, "Error reading spool file %s: %s", spoolname,
5259 /* If we managed to read the envelope data, received_time contains the
5260 time the message was received. Otherwise, we can calculate it from the
5263 if (rc != spool_read_hdrerror)
5266 for (i = 0; i < 6; i++)
5267 received_time = received_time * BASE_62 + tab62[id[i] - '0'];
5270 /* If we've had this malformed message too long, sling it. */
5272 if (now - received_time > keep_malformed)
5274 sprintf(CS spoolname, "%s/msglog/%s/%s", spool_directory, message_subdir, id);
5276 sprintf(CS spoolname, "%s/input/%s/%s-D", spool_directory, message_subdir, id);
5278 sprintf(CS spoolname, "%s/input/%s/%s-H", spool_directory, message_subdir, id);
5280 sprintf(CS spoolname, "%s/input/%s/%s-J", spool_directory, message_subdir, id);
5282 log_write(0, LOG_MAIN, "Message removed because older than %s",
5283 readconf_printtime(keep_malformed));
5286 (void)close(deliver_datafile);
5287 deliver_datafile = -1;
5288 return continue_closedown(); /* yields DELIVER_NOT_ATTEMPTED */
5291 /* The spool header file has been read. Look to see if there is an existing
5292 journal file for this message. If there is, it means that a previous delivery
5293 attempt crashed (program or host) before it could update the spool header file.
5294 Read the list of delivered addresses from the journal and add them to the
5295 nonrecipients tree. Then update the spool file. We can leave the journal in
5296 existence, as it will get further successful deliveries added to it in this
5297 run, and it will be deleted if this function gets to its end successfully.
5298 Otherwise it might be needed again. */
5300 sprintf(CS spoolname, "%s/input/%s/%s-J", spool_directory, message_subdir, id);
5301 jread = Ufopen(spoolname, "rb");
5304 while (Ufgets(big_buffer, big_buffer_size, jread))
5306 int n = Ustrlen(big_buffer);
5307 big_buffer[n-1] = 0;
5308 tree_add_nonrecipient(big_buffer);
5309 DEBUG(D_deliver) debug_printf("Previously delivered address %s taken from "
5310 "journal file\n", big_buffer);
5312 (void)fclose(jread);
5313 /* Panic-dies on error */
5314 (void)spool_write_header(message_id, SW_DELIVERING, NULL);
5316 else if (errno != ENOENT)
5318 log_write(0, LOG_MAIN|LOG_PANIC, "attempt to open journal for reading gave: "
5319 "%s", strerror(errno));
5320 return continue_closedown(); /* yields DELIVER_NOT_ATTEMPTED */
5323 /* A null recipients list indicates some kind of disaster. */
5325 if (!recipients_list)
5327 (void)close(deliver_datafile);
5328 deliver_datafile = -1;
5329 log_write(0, LOG_MAIN, "Spool error: no recipients for %s", spoolname);
5330 return continue_closedown(); /* yields DELIVER_NOT_ATTEMPTED */
5334 /* Handle a message that is frozen. There are a number of different things that
5335 can happen, but in the default situation, unless forced, no delivery is
5340 #ifdef SUPPORT_MOVE_FROZEN_MESSAGES
5341 /* Moving to another directory removes the message from Exim's view. Other
5342 tools must be used to deal with it. Logging of this action happens in
5343 spool_move_message() and its subfunctions. */
5345 if ( move_frozen_messages
5346 && spool_move_message(id, message_subdir, US"", US"F")
5348 return continue_closedown(); /* yields DELIVER_NOT_ATTEMPTED */
5351 /* For all frozen messages (bounces or not), timeout_frozen_after sets the
5352 maximum time to keep messages that are frozen. Thaw if we reach it, with a
5353 flag causing all recipients to be failed. The time is the age of the
5354 message, not the time since freezing. */
5356 if (timeout_frozen_after > 0 && message_age >= timeout_frozen_after)
5358 log_write(0, LOG_MAIN, "cancelled by timeout_frozen_after");
5359 process_recipients = RECIP_FAIL_TIMEOUT;
5362 /* For bounce messages (and others with no sender), thaw if the error message
5363 ignore timer is exceeded. The message will be discarded if this delivery
5366 else if (sender_address[0] == 0 && message_age >= ignore_bounce_errors_after)
5368 log_write(0, LOG_MAIN, "Unfrozen by errmsg timer");
5371 /* If this is a bounce message, or there's no auto thaw, or we haven't
5372 reached the auto thaw time yet, and this delivery is not forced by an admin
5373 user, do not attempt delivery of this message. Note that forced is set for
5374 continuing messages down the same channel, in order to skip load checking and
5375 ignore hold domains, but we don't want unfreezing in that case. */
5379 if ( ( sender_address[0] == 0
5381 || now <= deliver_frozen_at + auto_thaw
5383 && ( !forced || !deliver_force_thaw
5384 || !admin_user || continue_hostname
5387 (void)close(deliver_datafile);
5388 deliver_datafile = -1;
5389 log_write(L_skip_delivery, LOG_MAIN, "Message is frozen");
5390 return continue_closedown(); /* yields DELIVER_NOT_ATTEMPTED */
5393 /* If delivery was forced (by an admin user), assume a manual thaw.
5394 Otherwise it's an auto thaw. */
5398 deliver_manual_thaw = TRUE;
5399 log_write(0, LOG_MAIN, "Unfrozen by forced delivery");
5401 else log_write(0, LOG_MAIN, "Unfrozen by auto-thaw");
5404 /* We get here if any of the rules for unfreezing have triggered. */
5406 deliver_freeze = FALSE;
5407 update_spool = TRUE;
5411 /* Open the message log file if we are using them. This records details of
5412 deliveries, deferments, and failures for the benefit of the mail administrator.
5413 The log is not used by exim itself to track the progress of a message; that is
5414 done by rewriting the header spool file. */
5421 sprintf(CS spoolname, "%s/msglog/%s/%s", spool_directory, message_subdir, id);
5422 fd = open_msglog_file(spoolname, SPOOL_MODE, &error);
5426 log_write(0, LOG_MAIN|LOG_PANIC, "Couldn't %s message log %s: %s", error,
5427 spoolname, strerror(errno));
5428 return continue_closedown(); /* yields DELIVER_NOT_ATTEMPTED */
5431 /* Make a C stream out of it. */
5433 if (!(message_log = fdopen(fd, "a")))
5435 log_write(0, LOG_MAIN|LOG_PANIC, "Couldn't fdopen message log %s: %s",
5436 spoolname, strerror(errno));
5437 return continue_closedown(); /* yields DELIVER_NOT_ATTEMPTED */
5442 /* If asked to give up on a message, log who did it, and set the action for all
5447 struct passwd *pw = getpwuid(real_uid);
5448 log_write(0, LOG_MAIN, "cancelled by %s",
5449 pw ? US pw->pw_name : string_sprintf("uid %ld", (long int)real_uid));
5450 process_recipients = RECIP_FAIL;
5453 /* Otherwise, if there are too many Received: headers, fail all recipients. */
5455 else if (received_count > received_headers_max)
5456 process_recipients = RECIP_FAIL_LOOP;
5458 /* Otherwise, if a system-wide, address-independent message filter is
5459 specified, run it now, except in the case when we are failing all recipients as
5460 a result of timeout_frozen_after. If the system filter yields "delivered", then
5461 ignore the true recipients of the message. Failure of the filter file is
5462 logged, and the delivery attempt fails. */
5464 else if (system_filter && process_recipients != RECIP_FAIL_TIMEOUT)
5469 redirect_block redirect;
5471 if (system_filter_uid_set)
5473 ugid.uid = system_filter_uid;
5474 ugid.gid = system_filter_gid;
5475 ugid.uid_set = ugid.gid_set = TRUE;
5479 ugid.uid_set = ugid.gid_set = FALSE;
5482 return_path = sender_address;
5483 enable_dollar_recipients = TRUE; /* Permit $recipients in system filter */
5484 system_filtering = TRUE;
5486 /* Any error in the filter file causes a delivery to be abandoned. */
5488 redirect.string = system_filter;
5489 redirect.isfile = TRUE;
5490 redirect.check_owner = redirect.check_group = FALSE;
5491 redirect.owners = NULL;
5492 redirect.owngroups = NULL;
5494 redirect.modemask = 0;
5496 DEBUG(D_deliver|D_filter) debug_printf("running system filter\n");
5499 &redirect, /* Where the data is */
5500 RDO_DEFER | /* Turn on all the enabling options */
5501 RDO_FAIL | /* Leave off all the disabling options */
5506 NULL, /* No :include: restriction (not used in filter) */
5507 NULL, /* No sieve vacation directory (not sieve!) */
5508 NULL, /* No sieve enotify mailto owner (not sieve!) */
5509 NULL, /* No sieve user address (not sieve!) */
5510 NULL, /* No sieve subaddress (not sieve!) */
5511 &ugid, /* uid/gid data */
5512 &addr_new, /* Where to hang generated addresses */
5513 &filter_message, /* Where to put error message */
5514 NULL, /* Don't skip syntax errors */
5515 &filtertype, /* Will always be set to FILTER_EXIM for this call */
5516 US"system filter"); /* For error messages */
5518 DEBUG(D_deliver|D_filter) debug_printf("system filter returned %d\n", rc);
5520 if (rc == FF_ERROR || rc == FF_NONEXIST)
5522 (void)close(deliver_datafile);
5523 deliver_datafile = -1;
5524 log_write(0, LOG_MAIN|LOG_PANIC, "Error in system filter: %s",
5525 string_printing(filter_message));
5526 return continue_closedown(); /* yields DELIVER_NOT_ATTEMPTED */
5529 /* Reset things. If the filter message is an empty string, which can happen
5530 for a filter "fail" or "freeze" command with no text, reset it to NULL. */
5532 system_filtering = FALSE;
5533 enable_dollar_recipients = FALSE;
5534 if (filter_message && filter_message[0] == 0) filter_message = NULL;
5536 /* Save the values of the system filter variables so that user filters
5539 memcpy(filter_sn, filter_n, sizeof(filter_sn));
5541 /* The filter can request that delivery of the original addresses be
5546 process_recipients = RECIP_DEFER;
5547 deliver_msglog("Delivery deferred by system filter\n");
5548 log_write(0, LOG_MAIN, "Delivery deferred by system filter");
5551 /* The filter can request that a message be frozen, but this does not
5552 take place if the message has been manually thawed. In that case, we must
5553 unset "delivered", which is forced by the "freeze" command to make -bF
5556 else if (rc == FF_FREEZE && !deliver_manual_thaw)
5558 deliver_freeze = TRUE;
5559 deliver_frozen_at = time(NULL);
5560 process_recipients = RECIP_DEFER;
5561 frozen_info = string_sprintf(" by the system filter%s%s",
5562 filter_message ? US": " : US"",
5563 filter_message ? filter_message : US"");
5566 /* The filter can request that a message be failed. The error message may be
5567 quite long - it is sent back to the sender in the bounce - but we don't want
5568 to fill up the log with repetitions of it. If it starts with << then the text
5569 between << and >> is written to the log, with the rest left for the bounce
5572 else if (rc == FF_FAIL)
5574 uschar *colon = US"";
5575 uschar *logmsg = US"";
5578 process_recipients = RECIP_FAIL_FILTER;
5584 if ( filter_message[0] == '<'
5585 && filter_message[1] == '<'
5586 && (logend = Ustrstr(filter_message, ">>"))
5589 logmsg = filter_message + 2;
5590 loglen = logend - logmsg;
5591 filter_message = logend + 2;
5592 if (filter_message[0] == 0) filter_message = NULL;
5596 logmsg = filter_message;
5597 loglen = Ustrlen(filter_message);
5601 log_write(0, LOG_MAIN, "cancelled by system filter%s%.*s", colon, loglen,
5605 /* Delivery can be restricted only to those recipients (if any) that the
5606 filter specified. */
5608 else if (rc == FF_DELIVERED)
5610 process_recipients = RECIP_IGNORE;
5612 log_write(0, LOG_MAIN, "original recipients ignored (system filter)");
5614 log_write(0, LOG_MAIN, "=> discarded (system filter)");
5617 /* If any new addresses were created by the filter, fake up a "parent"
5618 for them. This is necessary for pipes, etc., which are expected to have
5619 parents, and it also gives some sensible logging for others. Allow
5620 pipes, files, and autoreplies, and run them as the filter uid if set,
5621 otherwise as the current uid. */
5625 int uid = (system_filter_uid_set)? system_filter_uid : geteuid();
5626 int gid = (system_filter_gid_set)? system_filter_gid : getegid();
5628 /* The text "system-filter" is tested in transport_set_up_command() and in
5629 set_up_shell_command() in the pipe transport, to enable them to permit
5630 $recipients, so don't change it here without also changing it there. */
5632 address_item *p = addr_new;
5633 address_item *parent = deliver_make_addr(US"system-filter", FALSE);
5635 parent->domain = string_copylc(qualify_domain_recipient);
5636 parent->local_part = US"system-filter";
5638 /* As part of this loop, we arrange for addr_last to end up pointing
5639 at the final address. This is used if we go on to add addresses for the
5640 original recipients. */
5644 if (parent->child_count == SHRT_MAX)
5645 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "system filter generated more "
5646 "than %d delivery addresses", SHRT_MAX);
5647 parent->child_count++;
5650 if (testflag(p, af_pfr))
5656 setflag(p, af_uid_set |
5662 /* Find the name of the system filter's appropriate pfr transport */
5664 if (p->address[0] == '|')
5667 tpname = system_filter_pipe_transport;
5668 address_pipe = p->address;
5670 else if (p->address[0] == '>')
5673 tpname = system_filter_reply_transport;
5677 if (p->address[Ustrlen(p->address)-1] == '/')
5679 type = US"directory";
5680 tpname = system_filter_directory_transport;
5685 tpname = system_filter_file_transport;
5687 address_file = p->address;
5690 /* Now find the actual transport, first expanding the name. We have
5691 set address_file or address_pipe above. */
5695 uschar *tmp = expand_string(tpname);
5696 address_file = address_pipe = NULL;
5698 p->message = string_sprintf("failed to expand \"%s\" as a "
5699 "system filter transport name", tpname);
5704 p->message = string_sprintf("system_filter_%s_transport is unset",
5710 transport_instance *tp;
5711 for (tp = transports; tp; tp = tp->next)
5713 if (Ustrcmp(tp->name, tpname) == 0)
5720 p->message = string_sprintf("failed to find \"%s\" transport "
5721 "for system filter delivery", tpname);
5724 /* If we couldn't set up a transport, defer the delivery, putting the
5725 error on the panic log as well as the main log. */
5729 address_item *badp = p;
5731 if (!addr_last) addr_new = p; else addr_last->next = p;
5732 badp->local_part = badp->address; /* Needed for log line */
5733 post_process_one(badp, DEFER, LOG_MAIN|LOG_PANIC, DTYPE_ROUTER, 0);
5736 } /* End of pfr handling */
5738 /* Either a non-pfr delivery, or we found a transport */
5740 DEBUG(D_deliver|D_filter)
5741 debug_printf("system filter added %s\n", p->address);
5745 } /* Loop through all addr_new addresses */
5750 /* Scan the recipients list, and for every one that is not in the non-
5751 recipients tree, add an addr item to the chain of new addresses. If the pno
5752 value is non-negative, we must set the onetime parent from it. This which
5753 points to the relevant entry in the recipients list.
5755 This processing can be altered by the setting of the process_recipients
5756 variable, which is changed if recipients are to be ignored, failed, or
5757 deferred. This can happen as a result of system filter activity, or if the -Mg
5758 option is used to fail all of them.
5760 Duplicate addresses are handled later by a different tree structure; we can't
5761 just extend the non-recipients tree, because that will be re-written to the
5762 spool if the message is deferred, and in any case there are casing
5763 complications for local addresses. */
5765 if (process_recipients != RECIP_IGNORE)
5767 for (i = 0; i < recipients_count; i++)
5769 if (!tree_search(tree_nonrecipients, recipients_list[i].address))
5771 recipient_item *r = recipients_list + i;
5772 address_item *new = deliver_make_addr(r->address, FALSE);
5773 new->prop.errors_address = r->errors_to;
5775 if ((new->prop.utf8_msg = message_smtputf8))
5777 new->prop.utf8_downcvt = message_utf8_downconvert == 1;
5778 new->prop.utf8_downcvt_maybe = message_utf8_downconvert == -1;
5779 DEBUG(D_deliver) debug_printf("utf8, downconvert %s\n",
5780 new->prop.utf8_downcvt ? "yes"
5781 : new->prop.utf8_downcvt_maybe ? "ifneeded"
5787 new->onetime_parent = recipients_list[r->pno].address;
5789 /* If DSN support is enabled, set the dsn flags and the original receipt
5790 to be passed on to other DSN enabled MTAs */
5791 new->dsn_flags = r->dsn_flags & rf_dsnflags;
5792 new->dsn_orcpt = r->orcpt;
5793 DEBUG(D_deliver) debug_printf("DSN: set orcpt: %s flags: %d\n",
5794 new->dsn_orcpt, new->dsn_flags);
5796 switch (process_recipients)
5798 /* RECIP_DEFER is set when a system filter freezes a message. */
5801 new->next = addr_defer;
5806 /* RECIP_FAIL_FILTER is set when a system filter has obeyed a "fail"
5809 case RECIP_FAIL_FILTER:
5811 filter_message ? filter_message : US"delivery cancelled";
5812 setflag(new, af_pass_message);
5813 goto RECIP_QUEUE_FAILED; /* below */
5816 /* RECIP_FAIL_TIMEOUT is set when a message is frozen, but is older
5817 than the value in timeout_frozen_after. Treat non-bounce messages
5818 similarly to -Mg; for bounce messages we just want to discard, so
5819 don't put the address on the failed list. The timeout has already
5822 case RECIP_FAIL_TIMEOUT:
5823 new->message = US"delivery cancelled; message timed out";
5824 goto RECIP_QUEUE_FAILED; /* below */
5827 /* RECIP_FAIL is set when -Mg has been used. */
5830 new->message = US"delivery cancelled by administrator";
5833 /* Common code for the failure cases above. If this is not a bounce
5834 message, put the address on the failed list so that it is used to
5835 create a bounce. Otherwise do nothing - this just discards the address.
5836 The incident has already been logged. */
5839 if (sender_address[0] != 0)
5841 new->next = addr_failed;
5847 /* RECIP_FAIL_LOOP is set when there are too many Received: headers
5848 in the message. Process each address as a routing failure; if this
5849 is a bounce message, it will get frozen. */
5851 case RECIP_FAIL_LOOP:
5852 new->message = US"Too many \"Received\" headers - suspected mail loop";
5853 post_process_one(new, FAIL, LOG_MAIN, DTYPE_ROUTER, 0);
5857 /* Value should be RECIP_ACCEPT; take this as the safe default. */
5860 if (!addr_new) addr_new = new; else addr_last->next = new;
5865 #ifndef DISABLE_EVENT
5866 if (process_recipients != RECIP_ACCEPT)
5868 uschar * save_local = deliver_localpart;
5869 const uschar * save_domain = deliver_domain;
5871 deliver_localpart = expand_string(
5872 string_sprintf("${local_part:%s}", new->address));
5873 deliver_domain = expand_string(
5874 string_sprintf("${domain:%s}", new->address));
5876 (void) event_raise(event_action,
5877 US"msg:fail:internal", new->message);
5879 deliver_localpart = save_local;
5880 deliver_domain = save_domain;
5890 debug_printf("Delivery address list:\n");
5891 for (p = addr_new; p; p = p->next)
5892 debug_printf(" %s %s\n", p->address,
5893 p->onetime_parent ? p->onetime_parent : US"");
5896 /* Set up the buffers used for copying over the file when delivering. */
5898 deliver_in_buffer = store_malloc(DELIVER_IN_BUFFER_SIZE);
5899 deliver_out_buffer = store_malloc(DELIVER_OUT_BUFFER_SIZE);
5903 /* Until there are no more new addresses, handle each one as follows:
5905 . If this is a generated address (indicated by the presence of a parent
5906 pointer) then check to see whether it is a pipe, file, or autoreply, and
5907 if so, handle it directly here. The router that produced the address will
5908 have set the allow flags into the address, and also set the uid/gid required.
5909 Having the routers generate new addresses and then checking them here at
5910 the outer level is tidier than making each router do the checking, and
5911 means that routers don't need access to the failed address queue.
5913 . Break up the address into local part and domain, and make lowercased
5914 versions of these strings. We also make unquoted versions of the local part.
5916 . Handle the percent hack for those domains for which it is valid.
5918 . For child addresses, determine if any of the parents have the same address.
5919 If so, generate a different string for previous delivery checking. Without
5920 this code, if the address spqr generates spqr via a forward or alias file,
5921 delivery of the generated spqr stops further attempts at the top level spqr,
5922 which is not what is wanted - it may have generated other addresses.
5924 . Check on the retry database to see if routing was previously deferred, but
5925 only if in a queue run. Addresses that are to be routed are put on the
5926 addr_route chain. Addresses that are to be deferred are put on the
5927 addr_defer chain. We do all the checking first, so as not to keep the
5928 retry database open any longer than necessary.
5930 . Now we run the addresses through the routers. A router may put the address
5931 on either the addr_local or the addr_remote chain for local or remote
5932 delivery, respectively, or put it on the addr_failed chain if it is
5933 undeliveable, or it may generate child addresses and put them on the
5934 addr_new chain, or it may defer an address. All the chain anchors are
5935 passed as arguments so that the routers can be called for verification
5938 . If new addresses have been generated by the routers, da capo.
5941 header_rewritten = FALSE; /* No headers rewritten yet */
5942 while (addr_new) /* Loop until all addresses dealt with */
5944 address_item *addr, *parent;
5946 /* Failure to open the retry database is treated the same as if it does
5947 not exist. In both cases, dbm_file is NULL. */
5949 if (!(dbm_file = dbfn_open(US"retry", O_RDONLY, &dbblock, FALSE)))
5951 DEBUG(D_deliver|D_retry|D_route|D_hints_lookup)
5952 debug_printf("no retry data available\n");
5955 /* Scan the current batch of new addresses, to handle pipes, files and
5956 autoreplies, and determine which others are ready for routing. */
5963 dbdata_retry *domain_retry_record;
5964 dbdata_retry *address_retry_record;
5967 addr_new = addr->next;
5969 DEBUG(D_deliver|D_retry|D_route)
5971 debug_printf(">>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>\n");
5972 debug_printf("Considering: %s\n", addr->address);
5975 /* Handle generated address that is a pipe or a file or an autoreply. */
5977 if (testflag(addr, af_pfr))
5979 /* If an autoreply in a filter could not generate a syntactically valid
5980 address, give up forthwith. Set af_ignore_error so that we don't try to
5981 generate a bounce. */
5983 if (testflag(addr, af_bad_reply))
5985 addr->basic_errno = ERRNO_BADADDRESS2;
5986 addr->local_part = addr->address;
5988 US"filter autoreply generated syntactically invalid recipient";
5989 setflag(addr, af_ignore_error);
5990 (void)post_process_one(addr, FAIL, LOG_MAIN, DTYPE_ROUTER, 0);
5991 continue; /* with the next new address */
5994 /* If two different users specify delivery to the same pipe or file or
5995 autoreply, there should be two different deliveries, so build a unique
5996 string that incorporates the original address, and use this for
5997 duplicate testing and recording delivery, and also for retrying. */
6000 string_sprintf("%s:%s", addr->address, addr->parent->unique +
6001 (testflag(addr->parent, af_homonym)? 3:0));
6003 addr->address_retry_key = addr->domain_retry_key =
6004 string_sprintf("T:%s", addr->unique);
6006 /* If a filter file specifies two deliveries to the same pipe or file,
6007 we want to de-duplicate, but this is probably not wanted for two mail
6008 commands to the same address, where probably both should be delivered.
6009 So, we have to invent a different unique string in that case. Just
6010 keep piling '>' characters on the front. */
6012 if (addr->address[0] == '>')
6014 while (tree_search(tree_duplicates, addr->unique))
6015 addr->unique = string_sprintf(">%s", addr->unique);
6018 else if ((tnode = tree_search(tree_duplicates, addr->unique)))
6020 DEBUG(D_deliver|D_route)
6021 debug_printf("%s is a duplicate address: discarded\n", addr->address);
6022 addr->dupof = tnode->data.ptr;
6023 addr->next = addr_duplicate;
6024 addr_duplicate = addr;
6028 DEBUG(D_deliver|D_route) debug_printf("unique = %s\n", addr->unique);
6030 /* Check for previous delivery */
6032 if (tree_search(tree_nonrecipients, addr->unique))
6034 DEBUG(D_deliver|D_route)
6035 debug_printf("%s was previously delivered: discarded\n", addr->address);
6036 child_done(addr, tod_stamp(tod_log));
6040 /* Save for checking future duplicates */
6042 tree_add_duplicate(addr->unique, addr);
6044 /* Set local part and domain */
6046 addr->local_part = addr->address;
6047 addr->domain = addr->parent->domain;
6049 /* Ensure that the delivery is permitted. */
6051 if (testflag(addr, af_file))
6053 if (!testflag(addr, af_allow_file))
6055 addr->basic_errno = ERRNO_FORBIDFILE;
6056 addr->message = US"delivery to file forbidden";
6057 (void)post_process_one(addr, FAIL, LOG_MAIN, DTYPE_ROUTER, 0);
6058 continue; /* with the next new address */
6061 else if (addr->address[0] == '|')
6063 if (!testflag(addr, af_allow_pipe))
6065 addr->basic_errno = ERRNO_FORBIDPIPE;
6066 addr->message = US"delivery to pipe forbidden";
6067 (void)post_process_one(addr, FAIL, LOG_MAIN, DTYPE_ROUTER, 0);
6068 continue; /* with the next new address */
6071 else if (!testflag(addr, af_allow_reply))
6073 addr->basic_errno = ERRNO_FORBIDREPLY;
6074 addr->message = US"autoreply forbidden";
6075 (void)post_process_one(addr, FAIL, LOG_MAIN, DTYPE_ROUTER, 0);
6076 continue; /* with the next new address */
6079 /* If the errno field is already set to BADTRANSPORT, it indicates
6080 failure to expand a transport string, or find the associated transport,
6081 or an unset transport when one is required. Leave this test till now so
6082 that the forbid errors are given in preference. */
6084 if (addr->basic_errno == ERRNO_BADTRANSPORT)
6086 (void)post_process_one(addr, DEFER, LOG_MAIN, DTYPE_ROUTER, 0);
6090 /* Treat /dev/null as a special case and abandon the delivery. This
6091 avoids having to specify a uid on the transport just for this case.
6092 Arrange for the transport name to be logged as "**bypassed**". */
6094 if (Ustrcmp(addr->address, "/dev/null") == 0)
6096 uschar *save = addr->transport->name;
6097 addr->transport->name = US"**bypassed**";
6098 (void)post_process_one(addr, OK, LOG_MAIN, DTYPE_TRANSPORT, '=');
6099 addr->transport->name = save;
6100 continue; /* with the next new address */
6103 /* Pipe, file, or autoreply delivery is to go ahead as a normal local
6106 DEBUG(D_deliver|D_route)
6107 debug_printf("queued for %s transport\n", addr->transport->name);
6108 addr->next = addr_local;
6110 continue; /* with the next new address */
6113 /* Handle normal addresses. First, split up into local part and domain,
6114 handling the %-hack if necessary. There is the possibility of a defer from
6115 a lookup in percent_hack_domains. */
6117 if ((rc = deliver_split_address(addr)) == DEFER)
6119 addr->message = US"cannot check percent_hack_domains";
6120 addr->basic_errno = ERRNO_LISTDEFER;
6121 (void)post_process_one(addr, DEFER, LOG_MAIN, DTYPE_NONE, 0);
6125 /* Check to see if the domain is held. If so, proceed only if the
6126 delivery was forced by hand. */
6128 deliver_domain = addr->domain; /* set $domain */
6129 if ( !forced && hold_domains
6130 && (rc = match_isinlist(addr->domain, (const uschar **)&hold_domains, 0,
6131 &domainlist_anchor, addr->domain_cache, MCL_DOMAIN, TRUE,
6137 addr->message = US"hold_domains lookup deferred";
6138 addr->basic_errno = ERRNO_LISTDEFER;
6142 addr->message = US"domain is held";
6143 addr->basic_errno = ERRNO_HELD;
6145 (void)post_process_one(addr, DEFER, LOG_MAIN, DTYPE_NONE, 0);
6149 /* Now we can check for duplicates and previously delivered addresses. In
6150 order to do this, we have to generate a "unique" value for each address,
6151 because there may be identical actual addresses in a line of descendents.
6152 The "unique" field is initialized to the same value as the "address" field,
6153 but gets changed here to cope with identically-named descendents. */
6155 for (parent = addr->parent; parent; parent = parent->parent)
6156 if (strcmpic(addr->address, parent->address) == 0) break;
6158 /* If there's an ancestor with the same name, set the homonym flag. This
6159 influences how deliveries are recorded. Then add a prefix on the front of
6160 the unique address. We use \n\ where n starts at 0 and increases each time.
6161 It is unlikely to pass 9, but if it does, it may look odd but will still
6162 work. This means that siblings or cousins with the same names are treated
6163 as duplicates, which is what we want. */
6167 setflag(addr, af_homonym);
6168 if (parent->unique[0] != '\\')
6169 addr->unique = string_sprintf("\\0\\%s", addr->address);
6171 addr->unique = string_sprintf("\\%c\\%s", parent->unique[1] + 1,
6175 /* Ensure that the domain in the unique field is lower cased, because
6176 domains are always handled caselessly. */
6178 p = Ustrrchr(addr->unique, '@');
6179 while (*p != 0) { *p = tolower(*p); p++; }
6181 DEBUG(D_deliver|D_route) debug_printf("unique = %s\n", addr->unique);
6183 if (tree_search(tree_nonrecipients, addr->unique))
6185 DEBUG(D_deliver|D_route)
6186 debug_printf("%s was previously delivered: discarded\n", addr->unique);
6187 child_done(addr, tod_stamp(tod_log));
6191 /* Get the routing retry status, saving the two retry keys (with and
6192 without the local part) for subsequent use. If there is no retry record for
6193 the standard address routing retry key, we look for the same key with the
6194 sender attached, because this form is used by the smtp transport after a
6195 4xx response to RCPT when address_retry_include_sender is true. */
6197 addr->domain_retry_key = string_sprintf("R:%s", addr->domain);
6198 addr->address_retry_key = string_sprintf("R:%s@%s", addr->local_part,
6203 domain_retry_record = dbfn_read(dbm_file, addr->domain_retry_key);
6204 if ( domain_retry_record
6205 && now - domain_retry_record->time_stamp > retry_data_expire
6207 domain_retry_record = NULL; /* Ignore if too old */
6209 address_retry_record = dbfn_read(dbm_file, addr->address_retry_key);
6210 if ( address_retry_record
6211 && now - address_retry_record->time_stamp > retry_data_expire
6213 address_retry_record = NULL; /* Ignore if too old */
6215 if (!address_retry_record)
6217 uschar *altkey = string_sprintf("%s:<%s>", addr->address_retry_key,
6219 address_retry_record = dbfn_read(dbm_file, altkey);
6220 if ( address_retry_record
6221 && now - address_retry_record->time_stamp > retry_data_expire)
6222 address_retry_record = NULL; /* Ignore if too old */
6226 domain_retry_record = address_retry_record = NULL;
6228 DEBUG(D_deliver|D_retry)
6230 if (!domain_retry_record)
6231 debug_printf("no domain retry record\n");
6232 if (!address_retry_record)
6233 debug_printf("no address retry record\n");
6236 /* If we are sending a message down an existing SMTP connection, we must
6237 assume that the message which created the connection managed to route
6238 an address to that connection. We do not want to run the risk of taking
6239 a long time over routing here, because if we do, the server at the other
6240 end of the connection may time it out. This is especially true for messages
6241 with lots of addresses. For this kind of delivery, queue_running is not
6242 set, so we would normally route all addresses. We take a pragmatic approach
6243 and defer routing any addresses that have any kind of domain retry record.
6244 That is, we don't even look at their retry times. It doesn't matter if this
6245 doesn't work occasionally. This is all just an optimization, after all.
6247 The reason for not doing the same for address retries is that they normally
6248 arise from 4xx responses, not DNS timeouts. */
6250 if (continue_hostname && domain_retry_record)
6252 addr->message = US"reusing SMTP connection skips previous routing defer";
6253 addr->basic_errno = ERRNO_RRETRY;
6254 (void)post_process_one(addr, DEFER, LOG_MAIN, DTYPE_ROUTER, 0);
6257 /* If we are in a queue run, defer routing unless there is no retry data or
6258 we've passed the next retry time, or this message is forced. In other
6259 words, ignore retry data when not in a queue run.
6261 However, if the domain retry time has expired, always allow the routing
6262 attempt. If it fails again, the address will be failed. This ensures that
6263 each address is routed at least once, even after long-term routing
6266 If there is an address retry, check that too; just wait for the next
6267 retry time. This helps with the case when the temporary error on the
6268 address was really message-specific rather than address specific, since
6269 it allows other messages through.
6271 We also wait for the next retry time if this is a message sent down an
6272 existing SMTP connection (even though that will be forced). Otherwise there
6273 will be far too many attempts for an address that gets a 4xx error. In
6274 fact, after such an error, we should not get here because, the host should
6275 not be remembered as one this message needs. However, there was a bug that
6276 used to cause this to happen, so it is best to be on the safe side.
6278 Even if we haven't reached the retry time in the hints, there is one more
6279 check to do, which is for the ultimate address timeout. We only do this
6280 check if there is an address retry record and there is not a domain retry
6281 record; this implies that previous attempts to handle the address had the
6282 retry_use_local_parts option turned on. We use this as an approximation
6283 for the destination being like a local delivery, for example delivery over
6284 LMTP to an IMAP message store. In this situation users are liable to bump
6285 into their quota and thereby have intermittently successful deliveries,
6286 which keep the retry record fresh, which can lead to us perpetually
6287 deferring messages. */
6289 else if ( ( queue_running && !deliver_force
6290 || continue_hostname
6292 && ( ( domain_retry_record
6293 && now < domain_retry_record->next_try
6294 && !domain_retry_record->expired
6296 || ( address_retry_record
6297 && now < address_retry_record->next_try
6299 && ( domain_retry_record
6300 || !address_retry_record
6301 || !retry_ultimate_address_timeout(addr->address_retry_key,
6302 addr->domain, address_retry_record, now)
6305 addr->message = US"retry time not reached";
6306 addr->basic_errno = ERRNO_RRETRY;
6307 (void)post_process_one(addr, DEFER, LOG_MAIN, DTYPE_ROUTER, 0);
6310 /* The domain is OK for routing. Remember if retry data exists so it
6311 can be cleaned up after a successful delivery. */
6315 if (domain_retry_record || address_retry_record)
6316 setflag(addr, af_dr_retry_exists);
6317 addr->next = addr_route;
6319 DEBUG(D_deliver|D_route)
6320 debug_printf("%s: queued for routing\n", addr->address);
6324 /* The database is closed while routing is actually happening. Requests to
6325 update it are put on a chain and all processed together at the end. */
6327 if (dbm_file) dbfn_close(dbm_file);
6329 /* If queue_domains is set, we don't even want to try routing addresses in
6330 those domains. During queue runs, queue_domains is forced to be unset.
6331 Optimize by skipping this pass through the addresses if nothing is set. */
6333 if (!deliver_force && queue_domains)
6335 address_item *okaddr = NULL;
6338 address_item *addr = addr_route;
6339 addr_route = addr->next;
6341 deliver_domain = addr->domain; /* set $domain */
6342 if ((rc = match_isinlist(addr->domain, (const uschar **)&queue_domains, 0,
6343 &domainlist_anchor, addr->domain_cache, MCL_DOMAIN, TRUE, NULL))
6348 addr->basic_errno = ERRNO_LISTDEFER;
6349 addr->message = US"queue_domains lookup deferred";
6350 (void)post_process_one(addr, DEFER, LOG_MAIN, DTYPE_ROUTER, 0);
6354 addr->next = okaddr;
6360 addr->basic_errno = ERRNO_QUEUE_DOMAIN;
6361 addr->message = US"domain is in queue_domains";
6362 (void)post_process_one(addr, DEFER, LOG_MAIN, DTYPE_ROUTER, 0);
6366 addr_route = okaddr;
6369 /* Now route those addresses that are not deferred. */
6374 address_item *addr = addr_route;
6375 const uschar *old_domain = addr->domain;
6376 uschar *old_unique = addr->unique;
6377 addr_route = addr->next;
6380 /* Just in case some router parameter refers to it. */
6382 if (!(return_path = addr->prop.errors_address))
6383 return_path = sender_address;
6385 /* If a router defers an address, add a retry item. Whether or not to
6386 use the local part in the key is a property of the router. */
6388 if ((rc = route_address(addr, &addr_local, &addr_remote, &addr_new,
6389 &addr_succeed, v_none)) == DEFER)
6390 retry_add_item(addr,
6391 addr->router->retry_use_local_part
6392 ? string_sprintf("R:%s@%s", addr->local_part, addr->domain)
6393 : string_sprintf("R:%s", addr->domain),
6396 /* Otherwise, if there is an existing retry record in the database, add
6397 retry items to delete both forms. We must also allow for the possibility
6398 of a routing retry that includes the sender address. Since the domain might
6399 have been rewritten (expanded to fully qualified) as a result of routing,
6400 ensure that the rewritten form is also deleted. */
6402 else if (testflag(addr, af_dr_retry_exists))
6404 uschar *altkey = string_sprintf("%s:<%s>", addr->address_retry_key,
6406 retry_add_item(addr, altkey, rf_delete);
6407 retry_add_item(addr, addr->address_retry_key, rf_delete);
6408 retry_add_item(addr, addr->domain_retry_key, rf_delete);
6409 if (Ustrcmp(addr->domain, old_domain) != 0)
6410 retry_add_item(addr, string_sprintf("R:%s", old_domain), rf_delete);
6413 /* DISCARD is given for :blackhole: and "seen finish". The event has been
6414 logged, but we need to ensure the address (and maybe parents) is marked
6419 address_done(addr, tod_stamp(tod_log));
6420 continue; /* route next address */
6423 /* The address is finished with (failed or deferred). */
6427 (void)post_process_one(addr, rc, LOG_MAIN, DTYPE_ROUTER, 0);
6428 continue; /* route next address */
6431 /* The address has been routed. If the router changed the domain, it will
6432 also have changed the unique address. We have to test whether this address
6433 has already been delivered, because it's the unique address that finally
6436 if ( addr->unique != old_unique
6437 && tree_search(tree_nonrecipients, addr->unique) != 0
6440 DEBUG(D_deliver|D_route) debug_printf("%s was previously delivered: "
6441 "discarded\n", addr->address);
6442 if (addr_remote == addr) addr_remote = addr->next;
6443 else if (addr_local == addr) addr_local = addr->next;
6446 /* If the router has same_domain_copy_routing set, we are permitted to copy
6447 the routing for any other addresses with the same domain. This is an
6448 optimisation to save repeated DNS lookups for "standard" remote domain
6449 routing. The option is settable only on routers that generate host lists.
6450 We play it very safe, and do the optimization only if the address is routed
6451 to a remote transport, there are no header changes, and the domain was not
6452 modified by the router. */
6454 if ( addr_remote == addr
6455 && addr->router->same_domain_copy_routing
6456 && !addr->prop.extra_headers
6457 && !addr->prop.remove_headers
6458 && old_domain == addr->domain
6461 address_item **chain = &addr_route;
6464 address_item *addr2 = *chain;
6465 if (Ustrcmp(addr2->domain, addr->domain) != 0)
6467 chain = &(addr2->next);
6471 /* Found a suitable address; take it off the routing list and add it to
6472 the remote delivery list. */
6474 *chain = addr2->next;
6475 addr2->next = addr_remote;
6476 addr_remote = addr2;
6478 /* Copy the routing data */
6480 addr2->domain = addr->domain;
6481 addr2->router = addr->router;
6482 addr2->transport = addr->transport;
6483 addr2->host_list = addr->host_list;
6484 addr2->fallback_hosts = addr->fallback_hosts;
6485 addr2->prop.errors_address = addr->prop.errors_address;
6486 copyflag(addr2, addr, af_hide_child | af_local_host_removed);
6488 DEBUG(D_deliver|D_route)
6490 debug_printf(">>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>\n"
6492 "Routing for %s copied from %s\n",
6493 addr2->address, addr2->address, addr->address);
6497 } /* Continue with routing the next address. */
6498 } /* Loop to process any child addresses that the routers created, and
6499 any rerouted addresses that got put back on the new chain. */
6502 /* Debugging: show the results of the routing */
6504 DEBUG(D_deliver|D_retry|D_route)
6507 debug_printf(">>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>\n");
6508 debug_printf("After routing:\n Local deliveries:\n");
6509 for (p = addr_local; p; p = p->next)
6510 debug_printf(" %s\n", p->address);
6512 debug_printf(" Remote deliveries:\n");
6513 for (p = addr_remote; p; p = p->next)
6514 debug_printf(" %s\n", p->address);
6516 debug_printf(" Failed addresses:\n");
6517 for (p = addr_failed; p; p = p->next)
6518 debug_printf(" %s\n", p->address);
6520 debug_printf(" Deferred addresses:\n");
6521 for (p = addr_defer; p; p = p->next)
6522 debug_printf(" %s\n", p->address);
6525 /* Free any resources that were cached during routing. */
6530 /* These two variables are set only during routing, after check_local_user.
6531 Ensure they are not set in transports. */
6533 local_user_gid = (gid_t)(-1);
6534 local_user_uid = (uid_t)(-1);
6536 /* Check for any duplicate addresses. This check is delayed until after
6537 routing, because the flexibility of the routing configuration means that
6538 identical addresses with different parentage may end up being redirected to
6539 different addresses. Checking for duplicates too early (as we previously used
6540 to) makes this kind of thing not work. */
6542 do_duplicate_check(&addr_local);
6543 do_duplicate_check(&addr_remote);
6545 /* When acting as an MUA wrapper, we proceed only if all addresses route to a
6546 remote transport. The check that they all end up in one transaction happens in
6547 the do_remote_deliveries() function. */
6550 && (addr_local || addr_failed || addr_defer)
6554 uschar *which, *colon, *msg;
6561 else if (addr_defer)
6564 which = US"deferred";
6572 while (addr->parent) addr = addr->parent;
6577 msg = addr->message;
6579 else colon = msg = US"";
6581 /* We don't need to log here for a forced failure as it will already
6582 have been logged. Defer will also have been logged, but as a defer, so we do
6583 need to do the failure logging. */
6585 if (addr != addr_failed)
6586 log_write(0, LOG_MAIN, "** %s routing yielded a %s delivery",
6587 addr->address, which);
6589 /* Always write an error to the caller */
6591 fprintf(stderr, "routing %s yielded a %s delivery%s%s\n", addr->address,
6594 final_yield = DELIVER_MUA_FAILED;
6595 addr_failed = addr_defer = NULL; /* So that we remove the message */
6596 goto DELIVERY_TIDYUP;
6600 /* If this is a run to continue deliveries to an external channel that is
6601 already set up, defer any local deliveries. */
6603 if (continue_transport)
6607 address_item *addr = addr_defer;
6608 while (addr->next) addr = addr->next;
6609 addr->next = addr_local;
6612 addr_defer = addr_local;
6617 /* Because address rewriting can happen in the routers, we should not really do
6618 ANY deliveries until all addresses have been routed, so that all recipients of
6619 the message get the same headers. However, this is in practice not always
6620 possible, since sometimes remote addresses give DNS timeouts for days on end.
6621 The pragmatic approach is to deliver what we can now, saving any rewritten
6622 headers so that at least the next lot of recipients benefit from the rewriting
6623 that has already been done.
6625 If any headers have been rewritten during routing, update the spool file to
6626 remember them for all subsequent deliveries. This can be delayed till later if
6627 there is only address to be delivered - if it succeeds the spool write need not
6630 if ( header_rewritten
6632 && (addr_local->next || addr_remote)
6634 || (addr_remote && addr_remote->next)
6637 /* Panic-dies on error */
6638 (void)spool_write_header(message_id, SW_DELIVERING, NULL);
6639 header_rewritten = FALSE;
6643 /* If there are any deliveries to be done, open the journal file. This is used
6644 to record successful deliveries as soon as possible after each delivery is
6645 known to be complete. A file opened with O_APPEND is used so that several
6646 processes can run simultaneously.
6648 The journal is just insurance against crashes. When the spool file is
6649 ultimately updated at the end of processing, the journal is deleted. If a
6650 journal is found to exist at the start of delivery, the addresses listed
6651 therein are added to the non-recipients. */
6653 if (addr_local || addr_remote)
6655 sprintf(CS spoolname, "%s/input/%s/%s-J", spool_directory, message_subdir, id);
6656 journal_fd = Uopen(spoolname, O_WRONLY|O_APPEND|O_CREAT, SPOOL_MODE);
6660 log_write(0, LOG_MAIN|LOG_PANIC, "Couldn't open journal file %s: %s",
6661 spoolname, strerror(errno));
6662 return DELIVER_NOT_ATTEMPTED;
6665 /* Set the close-on-exec flag, make the file owned by Exim, and ensure
6666 that the mode is correct - the group setting doesn't always seem to get
6667 set automatically. */
6669 if( fcntl(journal_fd, F_SETFD, fcntl(journal_fd, F_GETFD) | FD_CLOEXEC)
6670 || fchown(journal_fd, exim_uid, exim_gid)
6671 || fchmod(journal_fd, SPOOL_MODE)
6674 int ret = Uunlink(spoolname);
6675 log_write(0, LOG_MAIN|LOG_PANIC, "Couldn't set perms on journal file %s: %s",
6676 spoolname, strerror(errno));
6677 if(ret && errno != ENOENT)
6678 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to unlink %s: %s",
6679 spoolname, strerror(errno));
6680 return DELIVER_NOT_ATTEMPTED;
6686 /* Now we can get down to the business of actually doing deliveries. Local
6687 deliveries are done first, then remote ones. If ever the problems of how to
6688 handle fallback transports are figured out, this section can be put into a loop
6689 for handling fallbacks, though the uid switching will have to be revised. */
6691 /* Precompile a regex that is used to recognize a parameter in response
6692 to an LHLO command, if is isn't already compiled. This may be used on both
6693 local and remote LMTP deliveries. */
6695 if (!regex_IGNOREQUOTA)
6697 regex_must_compile(US"\\n250[\\s\\-]IGNOREQUOTA(\\s|\\n|$)", FALSE, TRUE);
6699 /* Handle local deliveries */
6703 DEBUG(D_deliver|D_transport)
6704 debug_printf(">>>>>>>>>>>>>>>> Local deliveries >>>>>>>>>>>>>>>>\n");
6705 do_local_deliveries();
6706 disable_logging = FALSE;
6709 /* If queue_run_local is set, we do not want to attempt any remote deliveries,
6710 so just queue them all. */
6712 if (queue_run_local)
6715 address_item *addr = addr_remote;
6716 addr_remote = addr->next;
6718 addr->basic_errno = ERRNO_LOCAL_ONLY;
6719 addr->message = US"remote deliveries suppressed";
6720 (void)post_process_one(addr, DEFER, LOG_MAIN, DTYPE_TRANSPORT, 0);
6723 /* Handle remote deliveries */
6727 DEBUG(D_deliver|D_transport)
6728 debug_printf(">>>>>>>>>>>>>>>> Remote deliveries >>>>>>>>>>>>>>>>\n");
6730 /* Precompile some regex that are used to recognize parameters in response
6731 to an EHLO command, if they aren't already compiled. */
6735 /* Now sort the addresses if required, and do the deliveries. The yield of
6736 do_remote_deliveries is FALSE when mua_wrapper is set and all addresses
6737 cannot be delivered in one transaction. */
6739 if (remote_sort_domains) sort_remote_deliveries();
6740 if (!do_remote_deliveries(FALSE))
6742 log_write(0, LOG_MAIN, "** mua_wrapper is set but recipients cannot all "
6743 "be delivered in one transaction");
6744 fprintf(stderr, "delivery to smarthost failed (configuration problem)\n");
6746 final_yield = DELIVER_MUA_FAILED;
6747 addr_failed = addr_defer = NULL; /* So that we remove the message */
6748 goto DELIVERY_TIDYUP;
6751 /* See if any of the addresses that failed got put on the queue for delivery
6752 to their fallback hosts. We do it this way because often the same fallback
6753 host is used for many domains, so all can be sent in a single transaction
6754 (if appropriately configured). */
6756 if (addr_fallback && !mua_wrapper)
6758 DEBUG(D_deliver) debug_printf("Delivering to fallback hosts\n");
6759 addr_remote = addr_fallback;
6760 addr_fallback = NULL;
6761 if (remote_sort_domains) sort_remote_deliveries();
6762 do_remote_deliveries(TRUE);
6764 disable_logging = FALSE;
6768 /* All deliveries are now complete. Ignore SIGTERM during this tidying up
6769 phase, to minimize cases of half-done things. */
6772 debug_printf(">>>>>>>>>>>>>>>> deliveries are done >>>>>>>>>>>>>>>>\n");
6774 /* Root privilege is no longer needed */
6776 exim_setugid(exim_uid, exim_gid, FALSE, US"post-delivery tidying");
6778 set_process_info("tidying up after delivering %s", message_id);
6779 signal(SIGTERM, SIG_IGN);
6781 /* When we are acting as an MUA wrapper, the smtp transport will either have
6782 succeeded for all addresses, or failed them all in normal cases. However, there
6783 are some setup situations (e.g. when a named port does not exist) that cause an
6784 immediate exit with deferral of all addresses. Convert those into failures. We
6785 do not ever want to retry, nor do we want to send a bounce message. */
6791 address_item *addr, *nextaddr;
6792 for (addr = addr_defer; addr; addr = nextaddr)
6794 log_write(0, LOG_MAIN, "** %s mua_wrapper forced failure for deferred "
6795 "delivery", addr->address);
6796 nextaddr = addr->next;
6797 addr->next = addr_failed;
6803 /* Now all should either have succeeded or failed. */
6806 final_yield = DELIVER_MUA_SUCCEEDED;
6810 uschar *s = addr_failed->user_message;
6812 if (!s) s = addr_failed->message;
6814 fprintf(stderr, "Delivery failed: ");
6815 if (addr_failed->basic_errno > 0)
6817 fprintf(stderr, "%s", strerror(addr_failed->basic_errno));
6818 if (s) fprintf(stderr, ": ");
6820 if ((host = addr_failed->host_used))
6821 fprintf(stderr, "H=%s [%s]: ", host->name, host->address);
6823 fprintf(stderr, "%s", CS s);
6824 else if (addr_failed->basic_errno <= 0)
6825 fprintf(stderr, "unknown error");
6826 fprintf(stderr, "\n");
6828 final_yield = DELIVER_MUA_FAILED;
6833 /* In a normal configuration, we now update the retry database. This is done in
6834 one fell swoop at the end in order not to keep opening and closing (and
6835 locking) the database. The code for handling retries is hived off into a
6836 separate module for convenience. We pass it the addresses of the various
6837 chains, because deferred addresses can get moved onto the failed chain if the
6838 retry cutoff time has expired for all alternative destinations. Bypass the
6839 updating of the database if the -N flag is set, which is a debugging thing that
6840 prevents actual delivery. */
6842 else if (!dont_deliver)
6843 retry_update(&addr_defer, &addr_failed, &addr_succeed);
6845 /* Send DSN for successful messages */
6846 addr_dsntmp = addr_succeed;
6847 addr_senddsn = NULL;
6851 /* af_ignore_error not honored here. it's not an error */
6854 debug_printf("DSN: processing router : %s\n"
6855 "DSN: processing successful delivery address: %s\n"
6856 "DSN: Sender_address: %s\n"
6857 "DSN: orcpt: %s flags: %d\n"
6858 "DSN: envid: %s ret: %d\n"
6859 "DSN: Final recipient: %s\n"
6860 "DSN: Remote SMTP server supports DSN: %d\n",
6861 addr_dsntmp->router->name,
6862 addr_dsntmp->address,
6864 addr_dsntmp->dsn_orcpt, addr_dsntmp->dsn_flags,
6866 addr_dsntmp->address,
6867 addr_dsntmp->dsn_aware
6871 /* send report if next hop not DSN aware or a router flagged "last DSN hop"
6872 and a report was requested */
6873 if ( ( addr_dsntmp->dsn_aware != dsn_support_yes
6874 || addr_dsntmp->dsn_flags & rf_dsnlasthop
6876 && addr_dsntmp->dsn_flags & rf_dsnflags
6877 && addr_dsntmp->dsn_flags & rf_notify_success
6880 /* copy and relink address_item and send report with all of them at once later */
6881 address_item *addr_next;
6882 addr_next = addr_senddsn;
6883 addr_senddsn = store_get(sizeof(address_item));
6884 memcpy(addr_senddsn, addr_dsntmp, sizeof(address_item));
6885 addr_senddsn->next = addr_next;
6888 DEBUG(D_deliver) debug_printf("DSN: not sending DSN success message\n");
6890 addr_dsntmp = addr_dsntmp->next;
6898 /* create exim process to send message */
6899 pid = child_open_exim(&fd);
6901 DEBUG(D_deliver) debug_printf("DSN: child_open_exim returns: %d\n", pid);
6903 if (pid < 0) /* Creation of child failed */
6905 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Process %d (parent %d) failed to "
6906 "create child process to send failure message: %s", getpid(),
6907 getppid(), strerror(errno));
6909 DEBUG(D_deliver) debug_printf("DSN: child_open_exim failed\n");
6911 else /* Creation of child succeeded */
6913 FILE *f = fdopen(fd, "wb");
6914 /* header only as required by RFC. only failure DSN needs to honor RET=FULL */
6915 int topt = topt_add_return_path | topt_no_body;
6919 debug_printf("sending error message to: %s\n", sender_address);
6921 /* build unique id for MIME boundary */
6922 bound = string_sprintf(TIME_T_FMT "-eximdsn-%d", time(NULL), rand());
6923 DEBUG(D_deliver) debug_printf("DSN: MIME boundary: %s\n", bound);
6925 if (errors_reply_to)
6926 fprintf(f, "Reply-To: %s\n", errors_reply_to);
6928 fprintf(f, "Auto-Submitted: auto-generated\n"
6929 "From: Mail Delivery System <Mailer-Daemon@%s>\n"
6931 "Subject: Delivery Status Notification\n"
6932 "Content-Type: multipart/report; report-type=delivery-status; boundary=%s\n"
6933 "MIME-Version: 1.0\n\n"
6936 "Content-type: text/plain; charset=us-ascii\n\n"
6938 "This message was created automatically by mail delivery software.\n"
6939 " ----- The following addresses had successful delivery notifications -----\n",
6940 qualify_domain_sender, sender_address, bound, bound);
6942 for (addr_dsntmp = addr_senddsn; addr_dsntmp;
6943 addr_dsntmp = addr_dsntmp->next)
6944 fprintf(f, "<%s> (relayed %s)\n\n",
6945 addr_dsntmp->address,
6946 (addr_dsntmp->dsn_flags & rf_dsnlasthop) == 1
6947 ? "via non DSN router"
6948 : addr_dsntmp->dsn_aware == dsn_support_no
6949 ? "to non-DSN-aware mailer"
6950 : "via non \"Remote SMTP\" router"
6954 "Content-type: message/delivery-status\n\n"
6955 "Reporting-MTA: dns; %s\n",
6956 bound, smtp_active_hostname);
6959 { /* must be decoded from xtext: see RFC 3461:6.3a */
6961 if (auth_xtextdecode(dsn_envid, &xdec_envid) > 0)
6962 fprintf(f, "Original-Envelope-ID: %s\n", dsn_envid);
6964 fprintf(f, "X-Original-Envelope-ID: error decoding xtext formated ENVID\n");
6968 for (addr_dsntmp = addr_senddsn;
6970 addr_dsntmp = addr_dsntmp->next)
6972 if (addr_dsntmp->dsn_orcpt)
6973 fprintf(f,"Original-Recipient: %s\n", addr_dsntmp->dsn_orcpt);
6975 fprintf(f, "Action: delivered\n"
6976 "Final-Recipient: rfc822;%s\n"
6978 addr_dsntmp->address);
6980 if (addr_dsntmp->host_used && addr_dsntmp->host_used->name)
6981 fprintf(f, "Remote-MTA: dns; %s\nDiagnostic-Code: smtp; 250 Ok\n\n",
6982 addr_dsntmp->host_used->name);
6984 fprintf(f, "Diagnostic-Code: X-Exim; relayed via non %s router\n\n",
6985 (addr_dsntmp->dsn_flags & rf_dsnlasthop) == 1 ? "DSN" : "SMTP");
6988 fprintf(f, "--%s\nContent-type: text/rfc822-headers\n\n", bound);
6991 transport_filter_argv = NULL; /* Just in case */
6992 return_path = sender_address; /* In case not previously set */
6994 /* Write the original email out */
6995 transport_write_message(NULL, fileno(f), topt, 0, NULL, NULL, NULL, NULL, NULL, 0);
6998 fprintf(f,"\n--%s--\n", bound);
7002 rc = child_close(pid, 0); /* Waits for child to close, no timeout */
7006 /* If any addresses failed, we must send a message to somebody, unless
7007 af_ignore_error is set, in which case no action is taken. It is possible for
7008 several messages to get sent if there are addresses with different
7015 uschar *logtod = tod_stamp(tod_log);
7017 address_item *handled_addr = NULL;
7018 address_item **paddr;
7019 address_item *msgchain = NULL;
7020 address_item **pmsgchain = &msgchain;
7022 /* There are weird cases when logging is disabled in the transport. However,
7023 there may not be a transport (address failed by a router). */
7025 disable_logging = FALSE;
7026 if (addr_failed->transport)
7027 disable_logging = addr_failed->transport->disable_logging;
7030 debug_printf("processing failed address %s\n", addr_failed->address);
7032 /* There are only two ways an address in a bounce message can get here:
7034 (1) When delivery was initially deferred, but has now timed out (in the call
7035 to retry_update() above). We can detect this by testing for
7036 af_retry_timedout. If the address does not have its own errors address,
7037 we arrange to ignore the error.
7039 (2) If delivery failures for bounce messages are being ignored. We can detect
7040 this by testing for af_ignore_error. This will also be set if a bounce
7041 message has been autothawed and the ignore_bounce_errors_after time has
7042 passed. It might also be set if a router was explicitly configured to
7043 ignore errors (errors_to = "").
7045 If neither of these cases obtains, something has gone wrong. Log the
7046 incident, but then ignore the error. */
7048 if (sender_address[0] == 0 && !addr_failed->prop.errors_address)
7050 if ( !testflag(addr_failed, af_retry_timedout)
7051 && !testflag(addr_failed, af_ignore_error))
7053 log_write(0, LOG_MAIN|LOG_PANIC, "internal error: bounce message "
7054 "failure is neither frozen nor ignored (it's been ignored)");
7056 setflag(addr_failed, af_ignore_error);
7059 /* If the first address on the list has af_ignore_error set, just remove
7060 it from the list, throw away any saved message file, log it, and
7061 mark the recipient done. */
7063 if ( testflag(addr_failed, af_ignore_error)
7064 || ( addr_failed->dsn_flags & rf_dsnflags
7065 && (addr_failed->dsn_flags & rf_notify_failure) != rf_notify_failure
7069 addr_failed = addr->next;
7070 if (addr->return_filename) Uunlink(addr->return_filename);
7072 log_write(0, LOG_MAIN, "%s%s%s%s: error ignored",
7074 !addr->parent ? US"" : US" <",
7075 !addr->parent ? US"" : addr->parent->address,
7076 !addr->parent ? US"" : US">");
7078 address_done(addr, logtod);
7079 child_done(addr, logtod);
7080 /* Panic-dies on error */
7081 (void)spool_write_header(message_id, SW_DELIVERING, NULL);
7084 /* Otherwise, handle the sending of a message. Find the error address for
7085 the first address, then send a message that includes all failed addresses
7086 that have the same error address. Note the bounce_recipient is a global so
7087 that it can be accesssed by $bounce_recipient while creating a customized
7092 if (!(bounce_recipient = addr_failed->prop.errors_address))
7093 bounce_recipient = sender_address;
7095 /* Make a subprocess to send a message */
7097 if ((pid = child_open_exim(&fd)) < 0)
7098 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Process %d (parent %d) failed to "
7099 "create child process to send failure message: %s", getpid(),
7100 getppid(), strerror(errno));
7102 /* Creation of child succeeded */
7109 uschar *bcc, *emf_text;
7110 FILE *f = fdopen(fd, "wb");
7112 BOOL to_sender = strcmpic(sender_address, bounce_recipient) == 0;
7113 int max = (bounce_return_size_limit/DELIVER_IN_BUFFER_SIZE + 1) *
7114 DELIVER_IN_BUFFER_SIZE;
7116 uschar *dsnlimitmsg;
7117 uschar *dsnnotifyhdr;
7121 debug_printf("sending error message to: %s\n", bounce_recipient);
7123 /* Scan the addresses for all that have the same errors address, removing
7124 them from the addr_failed chain, and putting them on msgchain. */
7126 paddr = &addr_failed;
7127 for (addr = addr_failed; addr; addr = *paddr)
7128 if (Ustrcmp(bounce_recipient, addr->prop.errors_address
7129 ? addr->prop.errors_address : sender_address) == 0)
7130 { /* The same - dechain */
7131 *paddr = addr->next;
7134 pmsgchain = &(addr->next);
7137 paddr = &addr->next; /* Not the same; skip */
7139 /* Include X-Failed-Recipients: for automatic interpretation, but do
7140 not let any one header line get too long. We do this by starting a
7141 new header every 50 recipients. Omit any addresses for which the
7142 "hide_child" flag is set. */
7144 for (addr = msgchain; addr; addr = addr->next)
7146 if (testflag(addr, af_hide_child)) continue;
7154 ? "X-Failed-Recipients: "
7156 testflag(addr, af_pfr) && addr->parent
7157 ? string_printing(addr->parent->address)
7158 : string_printing(addr->address));
7160 if (rcount > 0) fprintf(f, "\n");
7162 /* Output the standard headers */
7164 if (errors_reply_to)
7165 fprintf(f, "Reply-To: %s\n", errors_reply_to);
7166 fprintf(f, "Auto-Submitted: auto-replied\n");
7168 fprintf(f, "To: %s\n", bounce_recipient);
7170 /* generate boundary string and output MIME-Headers */
7171 bound = string_sprintf(TIME_T_FMT "-eximdsn-%d", time(NULL), rand());
7173 fprintf(f, "Content-Type: multipart/report;"
7174 " report-type=delivery-status; boundary=%s\n"
7175 "MIME-Version: 1.0\n",
7178 /* Open a template file if one is provided. Log failure to open, but
7179 carry on - default texts will be used. */
7181 if (bounce_message_file)
7182 if (!(emf = Ufopen(bounce_message_file, "rb")))
7183 log_write(0, LOG_MAIN|LOG_PANIC, "Failed to open %s for error "
7184 "message texts: %s", bounce_message_file, strerror(errno));
7186 /* Quietly copy to configured additional addresses if required. */
7188 if ((bcc = moan_check_errorcopy(bounce_recipient)))
7189 fprintf(f, "Bcc: %s\n", bcc);
7191 /* The texts for the message can be read from a template file; if there
7192 isn't one, or if it is too short, built-in texts are used. The first
7193 emf text is a Subject: and any other headers. */
7195 if ((emf_text = next_emf(emf, US"header")))
7196 fprintf(f, "%s\n", emf_text);
7198 fprintf(f, "Subject: Mail delivery failed%s\n\n",
7199 to_sender? ": returning message to sender" : "");
7201 /* output human readable part as text/plain section */
7203 "Content-type: text/plain; charset=us-ascii\n\n",
7206 if ((emf_text = next_emf(emf, US"intro")))
7207 fprintf(f, "%s", CS emf_text);
7211 /* This message has been reworded several times. It seems to be confusing to
7212 somebody, however it is worded. I have retreated to the original, simple
7214 "This message was created automatically by mail delivery software.\n");
7216 if (bounce_message_text)
7217 fprintf(f, "%s", CS bounce_message_text);
7220 "\nA message that you sent could not be delivered to one or more of its\n"
7221 "recipients. This is a permanent error. The following address(es) failed:\n");
7224 "\nA message sent by\n\n <%s>\n\n"
7225 "could not be delivered to one or more of its recipients. The following\n"
7226 "address(es) failed:\n", sender_address);
7230 /* Process the addresses, leaving them on the msgchain if they have a
7231 file name for a return message. (There has already been a check in
7232 post_process_one() for the existence of data in the message file.) A TRUE
7233 return from print_address_information() means that the address is not
7237 for (addr = msgchain; addr; addr = *paddr)
7239 if (print_address_information(addr, f, US" ", US"\n ", US""))
7240 print_address_error(addr, f, US"");
7242 /* End the final line for the address */
7246 /* Leave on msgchain if there's a return file. */
7248 if (addr->return_file >= 0)
7250 paddr = &(addr->next);
7254 /* Else save so that we can tick off the recipient when the
7259 *paddr = addr->next;
7260 addr->next = handled_addr;
7261 handled_addr = addr;
7267 /* Get the next text, whether we need it or not, so as to be
7268 positioned for the one after. */
7270 emf_text = next_emf(emf, US"generated text");
7272 /* If there were any file messages passed by the local transports,
7273 include them in the message. Then put the address on the handled chain.
7274 In the case of a batch of addresses that were all sent to the same
7275 transport, the return_file field in all of them will contain the same
7276 fd, and the return_filename field in the *last* one will be set (to the
7277 name of the file). */
7281 address_item *nextaddr;
7284 fprintf(f, "%s", CS emf_text);
7287 "The following text was generated during the delivery "
7288 "attempt%s:\n", (filecount > 1)? "s" : "");
7290 for (addr = msgchain; addr; addr = nextaddr)
7293 address_item *topaddr = addr;
7295 /* List all the addresses that relate to this file */
7298 while(addr) /* Insurance */
7300 print_address_information(addr, f, US"------ ", US"\n ",
7302 if (addr->return_filename) break;
7307 /* Now copy the file */
7309 if (!(fm = Ufopen(addr->return_filename, "rb")))
7310 fprintf(f, " +++ Exim error... failed to open text file: %s\n",
7314 while ((ch = fgetc(fm)) != EOF) fputc(ch, f);
7317 Uunlink(addr->return_filename);
7319 /* Can now add to handled chain, first fishing off the next
7320 address on the msgchain. */
7322 nextaddr = addr->next;
7323 addr->next = handled_addr;
7324 handled_addr = topaddr;
7329 /* output machine readable part */
7331 if (message_smtputf8)
7333 "Content-type: message/global-delivery-status\n\n"
7334 "Reporting-MTA: dns; %s\n",
7335 bound, smtp_active_hostname);
7339 "Content-type: message/delivery-status\n\n"
7340 "Reporting-MTA: dns; %s\n",
7341 bound, smtp_active_hostname);
7345 /* must be decoded from xtext: see RFC 3461:6.3a */
7347 if (auth_xtextdecode(dsn_envid, &xdec_envid) > 0)
7348 fprintf(f, "Original-Envelope-ID: %s\n", dsn_envid);
7350 fprintf(f, "X-Original-Envelope-ID: error decoding xtext formated ENVID\n");
7354 for (addr = handled_addr; addr; addr = addr->next)
7357 fprintf(f, "Action: failed\n"
7358 "Final-Recipient: rfc822;%s\n"
7361 if ((hu = addr->host_used) && hu->name)
7364 fprintf(f, "Remote-MTA: dns; %s\n", hu->name);
7365 #ifdef EXPERIMENTAL_DSN_INFO
7368 uschar * p = hu->port == 25
7369 ? US"" : string_sprintf(":%d", hu->port);
7370 fprintf(f, "Remote-MTA: X-ip; [%s]%s\n", hu->address, p);
7372 if ((s = addr->smtp_greeting) && *s)
7373 fprintf(f, "X-Remote-MTA-smtp-greeting: X-str; %s\n", s);
7374 if ((s = addr->helo_response) && *s)
7375 fprintf(f, "X-Remote-MTA-helo-response: X-str; %s\n", s);
7376 if ((s = addr->message) && *s)
7377 fprintf(f, "X-Exim-Diagnostic: X-str; %s\n", s);
7379 print_dsn_diagnostic_code(addr, f);
7384 /* Now copy the message, trying to give an intelligible comment if
7385 it is too long for it all to be copied. The limit isn't strictly
7386 applied because of the buffering. There is, however, an option
7387 to suppress copying altogether. */
7389 emf_text = next_emf(emf, US"copy");
7392 we ignore the intro text from template and add
7393 the text for bounce_return_size_limit at the end.
7395 bounce_return_message is ignored
7396 in case RET= is defined we honor these values
7397 otherwise bounce_return_body is honored.
7399 bounce_return_size_limit is always honored.
7402 fprintf(f, "--%s\n", bound);
7404 dsnlimitmsg = US"X-Exim-DSN-Information: Due to administrative limits only headers are returned";
7405 dsnnotifyhdr = NULL;
7406 topt = topt_add_return_path;
7408 /* RET=HDRS? top priority */
7409 if (dsn_ret == dsn_ret_hdrs)
7410 topt |= topt_no_body;
7412 /* no full body return at all? */
7413 if (!bounce_return_body)
7415 topt |= topt_no_body;
7416 /* add header if we overrule RET=FULL */
7417 if (dsn_ret == dsn_ret_full)
7418 dsnnotifyhdr = dsnlimitmsg;
7420 /* size limited ... return headers only if limit reached */
7421 else if (bounce_return_size_limit > 0)
7423 struct stat statbuf;
7424 if (fstat(deliver_datafile, &statbuf) == 0 && statbuf.st_size > max)
7426 topt |= topt_no_body;
7427 dsnnotifyhdr = dsnlimitmsg;
7432 if (message_smtputf8)
7433 fputs(topt & topt_no_body ? "Content-type: message/global-headers\n\n"
7434 : "Content-type: message/global\n\n",
7438 fputs(topt & topt_no_body ? "Content-type: text/rfc822-headers\n\n"
7439 : "Content-type: message/rfc822\n\n",
7443 transport_filter_argv = NULL; /* Just in case */
7444 return_path = sender_address; /* In case not previously set */
7445 transport_write_message(NULL, fileno(f), topt,
7446 0, dsnnotifyhdr, NULL, NULL, NULL, NULL, 0);
7449 /* we never add the final text. close the file */
7453 fprintf(f, "\n--%s--\n", bound);
7455 /* Close the file, which should send an EOF to the child process
7456 that is receiving the message. Wait for it to finish. */
7459 rc = child_close(pid, 0); /* Waits for child to close, no timeout */
7461 /* In the test harness, let the child do it's thing first. */
7463 if (running_in_test_harness) millisleep(500);
7465 /* If the process failed, there was some disaster in setting up the
7466 error message. Unless the message is very old, ensure that addr_defer
7467 is non-null, which will have the effect of leaving the message on the
7468 spool. The failed addresses will get tried again next time. However, we
7469 don't really want this to happen too often, so freeze the message unless
7470 there are some genuine deferred addresses to try. To do this we have
7471 to call spool_write_header() here, because with no genuine deferred
7472 addresses the normal code below doesn't get run. */
7477 if (now - received_time < retry_maximum_timeout && !addr_defer)
7479 addr_defer = (address_item *)(+1);
7480 deliver_freeze = TRUE;
7481 deliver_frozen_at = time(NULL);
7482 /* Panic-dies on error */
7483 (void)spool_write_header(message_id, SW_DELIVERING, NULL);
7486 deliver_msglog("Process failed (%d) when writing error message "
7487 "to %s%s", rc, bounce_recipient, s);
7488 log_write(0, LOG_MAIN, "Process failed (%d) when writing error message "
7489 "to %s%s", rc, bounce_recipient, s);
7492 /* The message succeeded. Ensure that the recipients that failed are
7493 now marked finished with on the spool and their parents updated. */
7497 for (addr = handled_addr; addr; addr = addr->next)
7499 address_done(addr, logtod);
7500 child_done(addr, logtod);
7502 /* Panic-dies on error */
7503 (void)spool_write_header(message_id, SW_DELIVERING, NULL);
7509 disable_logging = FALSE; /* In case left set */
7511 /* Come here from the mua_wrapper case if routing goes wrong */
7515 /* If there are now no deferred addresses, we are done. Preserve the
7516 message log if so configured, and we are using them. Otherwise, sling it.
7517 Then delete the message itself. */
7523 sprintf(CS spoolname, "%s/msglog/%s/%s", spool_directory, message_subdir,
7525 if (preserve_message_logs)
7528 sprintf(CS big_buffer, "%s/msglog.OLD/%s", spool_directory, id);
7529 if ((rc = Urename(spoolname, big_buffer)) < 0)
7531 (void)directory_make(spool_directory, US"msglog.OLD",
7532 MSGLOG_DIRECTORY_MODE, TRUE);
7533 rc = Urename(spoolname, big_buffer);
7536 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to move %s to the "
7537 "msglog.OLD directory", spoolname);
7540 if (Uunlink(spoolname) < 0)
7541 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to unlink %s: %s",
7542 spoolname, strerror(errno));
7545 /* Remove the two message files. */
7547 sprintf(CS spoolname, "%s/input/%s/%s-D", spool_directory, message_subdir, id);
7548 if (Uunlink(spoolname) < 0)
7549 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to unlink %s: %s",
7550 spoolname, strerror(errno));
7551 sprintf(CS spoolname, "%s/input/%s/%s-H", spool_directory, message_subdir, id);
7552 if (Uunlink(spoolname) < 0)
7553 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to unlink %s: %s",
7554 spoolname, strerror(errno));
7556 /* Log the end of this message, with queue time if requested. */
7558 if (LOGGING(queue_time_overall))
7559 log_write(0, LOG_MAIN, "Completed QT=%s",
7560 readconf_printtime( (int) ((long)time(NULL) - (long)received_time)) );
7562 log_write(0, LOG_MAIN, "Completed");
7564 /* Unset deliver_freeze so that we won't try to move the spool files further down */
7565 deliver_freeze = FALSE;
7567 #ifndef DISABLE_EVENT
7568 (void) event_raise(event_action, US"msg:complete", NULL);
7572 /* If there are deferred addresses, we are keeping this message because it is
7573 not yet completed. Lose any temporary files that were catching output from
7574 pipes for any of the deferred addresses, handle one-time aliases, and see if
7575 the message has been on the queue for so long that it is time to send a warning
7576 message to the sender, unless it is a mailer-daemon. If all deferred addresses
7577 have the same domain, we can set deliver_domain for the expansion of
7578 delay_warning_ condition - if any of them are pipes, files, or autoreplies, use
7579 the parent's domain.
7581 If all the deferred addresses have an error number that indicates "retry time
7582 not reached", skip sending the warning message, because it won't contain the
7583 reason for the delay. It will get sent at the next real delivery attempt.
7584 However, if at least one address has tried, we'd better include all of them in
7587 If we can't make a process to send the message, don't worry.
7589 For mailing list expansions we want to send the warning message to the
7590 mailing list manager. We can't do a perfect job here, as some addresses may
7591 have different errors addresses, but if we take the errors address from
7592 each deferred address it will probably be right in most cases.
7594 If addr_defer == +1, it means there was a problem sending an error message
7595 for failed addresses, and there were no "real" deferred addresses. The value
7596 was set just to keep the message on the spool, so there is nothing to do here.
7599 else if (addr_defer != (address_item *)(+1))
7602 uschar *recipients = US"";
7603 BOOL delivery_attempted = FALSE;
7605 deliver_domain = testflag(addr_defer, af_pfr)
7606 ? addr_defer->parent->domain : addr_defer->domain;
7608 for (addr = addr_defer; addr; addr = addr->next)
7610 address_item *otaddr;
7612 if (addr->basic_errno > ERRNO_RETRY_BASE) delivery_attempted = TRUE;
7616 const uschar *d = testflag(addr, af_pfr)
7617 ? addr->parent->domain : addr->domain;
7619 /* The domain may be unset for an address that has never been routed
7620 because the system filter froze the message. */
7622 if (!d || Ustrcmp(d, deliver_domain) != 0)
7623 deliver_domain = NULL;
7626 if (addr->return_filename) Uunlink(addr->return_filename);
7628 /* Handle the case of one-time aliases. If any address in the ancestry
7629 of this one is flagged, ensure it is in the recipients list, suitably
7630 flagged, and that its parent is marked delivered. */
7632 for (otaddr = addr; otaddr; otaddr = otaddr->parent)
7633 if (otaddr->onetime_parent) break;
7638 int t = recipients_count;
7640 for (i = 0; i < recipients_count; i++)
7642 uschar *r = recipients_list[i].address;
7643 if (Ustrcmp(otaddr->onetime_parent, r) == 0) t = i;
7644 if (Ustrcmp(otaddr->address, r) == 0) break;
7647 /* Didn't find the address already in the list, and did find the
7648 ultimate parent's address in the list. After adding the recipient,
7649 update the errors address in the recipients list. */
7651 if (i >= recipients_count && t < recipients_count)
7653 DEBUG(D_deliver) debug_printf("one_time: adding %s in place of %s\n",
7654 otaddr->address, otaddr->parent->address);
7655 receive_add_recipient(otaddr->address, t);
7656 recipients_list[recipients_count-1].errors_to = otaddr->prop.errors_address;
7657 tree_add_nonrecipient(otaddr->parent->address);
7658 update_spool = TRUE;
7662 /* Except for error messages, ensure that either the errors address for
7663 this deferred address or, if there is none, the sender address, is on the
7664 list of recipients for a warning message. */
7666 if (sender_address[0] != 0)
7667 if (addr->prop.errors_address)
7669 if (Ustrstr(recipients, addr->prop.errors_address) == NULL)
7670 recipients = string_sprintf("%s%s%s", recipients,
7671 (recipients[0] == 0)? "" : ",", addr->prop.errors_address);
7675 if (Ustrstr(recipients, sender_address) == NULL)
7676 recipients = string_sprintf("%s%s%s", recipients,
7677 (recipients[0] == 0)? "" : ",", sender_address);
7681 /* Send a warning message if the conditions are right. If the condition check
7682 fails because of a lookup defer, there is nothing we can do. The warning
7683 is not sent. Another attempt will be made at the next delivery attempt (if
7687 && delivery_attempted
7688 && ( ((addr_defer->dsn_flags & rf_dsnflags) == 0)
7689 || (addr_defer->dsn_flags & rf_notify_delay) == rf_notify_delay
7691 && delay_warning[1] > 0
7692 && sender_address[0] != 0
7693 && ( !delay_warning_condition
7694 || expand_check_condition(delay_warning_condition,
7695 US"delay_warning", US"option")
7701 int queue_time = time(NULL) - received_time;
7703 /* When running in the test harness, there's an option that allows us to
7704 fudge this time so as to get repeatability of the tests. Take the first
7705 time off the list. In queue runs, the list pointer gets updated in the
7708 if (running_in_test_harness && fudged_queue_times[0] != 0)
7710 int qt = readconf_readtime(fudged_queue_times, '/', FALSE);
7713 DEBUG(D_deliver) debug_printf("fudged queue_times = %s\n",
7714 fudged_queue_times);
7719 /* See how many warnings we should have sent by now */
7721 for (count = 0; count < delay_warning[1]; count++)
7722 if (queue_time < delay_warning[count+2]) break;
7724 show_time = delay_warning[count+1];
7726 if (count >= delay_warning[1])
7729 int last_gap = show_time;
7730 if (count > 1) last_gap -= delay_warning[count];
7731 extra = (queue_time - delay_warning[count+1])/last_gap;
7732 show_time += last_gap * extra;
7738 debug_printf("time on queue = %s\n", readconf_printtime(queue_time));
7739 debug_printf("warning counts: required %d done %d\n", count,
7743 /* We have computed the number of warnings there should have been by now.
7744 If there haven't been enough, send one, and up the count to what it should
7747 if (warning_count < count)
7751 pid_t pid = child_open_exim(&fd);
7757 FILE *f = fdopen(fd, "wb");
7760 if (warn_message_file)
7761 if (!(wmf = Ufopen(warn_message_file, "rb")))
7762 log_write(0, LOG_MAIN|LOG_PANIC, "Failed to open %s for warning "
7763 "message texts: %s", warn_message_file, strerror(errno));
7765 warnmsg_recipients = recipients;
7766 warnmsg_delay = queue_time < 120*60
7767 ? string_sprintf("%d minutes", show_time/60)
7768 : string_sprintf("%d hours", show_time/3600);
7770 if (errors_reply_to)
7771 fprintf(f, "Reply-To: %s\n", errors_reply_to);
7772 fprintf(f, "Auto-Submitted: auto-replied\n");
7774 fprintf(f, "To: %s\n", recipients);
7776 /* generated boundary string and output MIME-Headers */
7777 bound = string_sprintf(TIME_T_FMT "-eximdsn-%d", time(NULL), rand());
7779 fprintf(f, "Content-Type: multipart/report;"
7780 " report-type=delivery-status; boundary=%s\n"
7781 "MIME-Version: 1.0\n",
7784 if ((wmf_text = next_emf(wmf, US"header")))
7785 fprintf(f, "%s\n", wmf_text);
7787 fprintf(f, "Subject: Warning: message %s delayed %s\n\n",
7788 message_id, warnmsg_delay);
7790 /* output human readable part as text/plain section */
7792 "Content-type: text/plain; charset=us-ascii\n\n",
7795 if ((wmf_text = next_emf(wmf, US"intro")))
7796 fprintf(f, "%s", CS wmf_text);
7800 "This message was created automatically by mail delivery software.\n");
7802 if (Ustrcmp(recipients, sender_address) == 0)
7804 "A message that you sent has not yet been delivered to one or more of its\n"
7805 "recipients after more than ");
7809 "A message sent by\n\n <%s>\n\n"
7810 "has not yet been delivered to one or more of its recipients after more than \n",
7813 fprintf(f, "%s on the queue on %s.\n\n"
7814 "The message identifier is: %s\n",
7815 warnmsg_delay, primary_hostname, message_id);
7817 for (h = header_list; h; h = h->next)
7818 if (strncmpic(h->text, US"Subject:", 8) == 0)
7819 fprintf(f, "The subject of the message is: %s", h->text + 9);
7820 else if (strncmpic(h->text, US"Date:", 5) == 0)
7821 fprintf(f, "The date of the message is: %s", h->text + 6);
7824 fprintf(f, "The address%s to which the message has not yet been "
7826 !addr_defer->next ? "" : "es",
7827 !addr_defer->next ? "is": "are");
7830 /* List the addresses, with error information if allowed */
7832 /* store addr_defer for machine readable part */
7833 address_item *addr_dsndefer = addr_defer;
7837 address_item *addr = addr_defer;
7838 addr_defer = addr->next;
7839 if (print_address_information(addr, f, US" ", US"\n ", US""))
7840 print_address_error(addr, f, US"Delay reason: ");
7849 if ((wmf_text = next_emf(wmf, US"final")))
7850 fprintf(f, "%s", CS wmf_text);
7856 "No action is required on your part. Delivery attempts will continue for\n"
7857 "some time, and this warning may be repeated at intervals if the message\n"
7858 "remains undelivered. Eventually the mail delivery software will give up,\n"
7859 "and when that happens, the message will be returned to you.\n");
7862 /* output machine readable part */
7863 fprintf(f, "\n--%s\n"
7864 "Content-type: message/delivery-status\n\n"
7865 "Reporting-MTA: dns; %s\n",
7867 smtp_active_hostname);
7872 /* must be decoded from xtext: see RFC 3461:6.3a */
7874 if (auth_xtextdecode(dsn_envid, &xdec_envid) > 0)
7875 fprintf(f,"Original-Envelope-ID: %s\n", dsn_envid);
7877 fprintf(f,"X-Original-Envelope-ID: error decoding xtext formated ENVID\n");
7881 for ( ; addr_dsndefer; addr_dsndefer = addr_dsndefer->next)
7883 if (addr_dsndefer->dsn_orcpt)
7884 fprintf(f, "Original-Recipient: %s\n", addr_dsndefer->dsn_orcpt);
7886 fprintf(f, "Action: delayed\n"
7887 "Final-Recipient: rfc822;%s\n"
7889 addr_dsndefer->address);
7890 if (addr_dsndefer->host_used && addr_dsndefer->host_used->name)
7892 fprintf(f, "Remote-MTA: dns; %s\n",
7893 addr_dsndefer->host_used->name);
7894 print_dsn_diagnostic_code(addr_dsndefer, f);
7900 "Content-type: text/rfc822-headers\n\n",
7904 /* header only as required by RFC. only failure DSN needs to honor RET=FULL */
7905 int topt = topt_add_return_path | topt_no_body;
7906 transport_filter_argv = NULL; /* Just in case */
7907 return_path = sender_address; /* In case not previously set */
7908 /* Write the original email out */
7909 transport_write_message(NULL, fileno(f), topt, 0, NULL, NULL, NULL, NULL, NULL, 0);
7912 fprintf(f,"\n--%s--\n", bound);
7916 /* Close and wait for child process to complete, without a timeout.
7917 If there's an error, don't update the count. */
7920 if (child_close(pid, 0) == 0)
7922 warning_count = count;
7923 update_spool = TRUE; /* Ensure spool rewritten */
7929 /* Clear deliver_domain */
7931 deliver_domain = NULL;
7933 /* If this was a first delivery attempt, unset the first time flag, and
7934 ensure that the spool gets updated. */
7936 if (deliver_firsttime)
7938 deliver_firsttime = FALSE;
7939 update_spool = TRUE;
7942 /* If delivery was frozen and freeze_tell is set, generate an appropriate
7943 message, unless the message is a local error message (to avoid loops). Then
7944 log the freezing. If the text in "frozen_info" came from a system filter,
7945 it has been escaped into printing characters so as not to mess up log lines.
7946 For the "tell" message, we turn \n back into newline. Also, insert a newline
7947 near the start instead of the ": " string. */
7951 if (freeze_tell && freeze_tell[0] != 0 && !local_error_message)
7953 uschar *s = string_copy(frozen_info);
7954 uschar *ss = Ustrstr(s, " by the system filter: ");
7965 if (*ss == '\\' && ss[1] == 'n')
7972 moan_tell_someone(freeze_tell, addr_defer, US"Message frozen",
7973 "Message %s has been frozen%s.\nThe sender is <%s>.\n", message_id,
7977 /* Log freezing just before we update the -H file, to minimize the chance
7978 of a race problem. */
7980 deliver_msglog("*** Frozen%s\n", frozen_info);
7981 log_write(0, LOG_MAIN, "Frozen%s", frozen_info);
7984 /* If there have been any updates to the non-recipients list, or other things
7985 that get written to the spool, we must now update the spool header file so
7986 that it has the right information for the next delivery attempt. If there
7987 was more than one address being delivered, the header_change update is done
7988 earlier, in case one succeeds and then something crashes. */
7991 debug_printf("delivery deferred: update_spool=%d header_rewritten=%d\n",
7992 update_spool, header_rewritten);
7994 if (update_spool || header_rewritten)
7995 /* Panic-dies on error */
7996 (void)spool_write_header(message_id, SW_DELIVERING, NULL);
7999 /* Finished with the message log. If the message is complete, it will have
8000 been unlinked or renamed above. */
8002 if (message_logs) (void)fclose(message_log);
8004 /* Now we can close and remove the journal file. Its only purpose is to record
8005 successfully completed deliveries asap so that this information doesn't get
8006 lost if Exim (or the machine) crashes. Forgetting about a failed delivery is
8007 not serious, as trying it again is not harmful. The journal might not be open
8008 if all addresses were deferred at routing or directing. Nevertheless, we must
8009 remove it if it exists (may have been lying around from a crash during the
8010 previous delivery attempt). We don't remove the journal if a delivery
8011 subprocess failed to pass back delivery information; this is controlled by
8012 the remove_journal flag. When the journal is left, we also don't move the
8013 message off the main spool if frozen and the option is set. It should get moved
8014 at the next attempt, after the journal has been inspected. */
8016 if (journal_fd >= 0) (void)close(journal_fd);
8020 sprintf(CS spoolname, "%s/input/%s/%s-J", spool_directory, message_subdir, id);
8021 if (Uunlink(spoolname) < 0 && errno != ENOENT)
8022 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to unlink %s: %s", spoolname,
8025 /* Move the message off the spool if reqested */
8027 #ifdef SUPPORT_MOVE_FROZEN_MESSAGES
8028 if (deliver_freeze && move_frozen_messages)
8029 (void)spool_move_message(id, message_subdir, US"", US"F");
8033 /* Closing the data file frees the lock; if the file has been unlinked it
8034 will go away. Otherwise the message becomes available for another process
8037 (void)close(deliver_datafile);
8038 deliver_datafile = -1;
8039 DEBUG(D_deliver) debug_printf("end delivery of %s\n", id);
8041 /* It is unlikely that there will be any cached resources, since they are
8042 released after routing, and in the delivery subprocesses. However, it's
8043 possible for an expansion for something afterwards (for example,
8044 expand_check_condition) to do a lookup. We must therefore be sure everything is
8048 acl_where = ACL_WHERE_UNKNOWN;
8057 if (!regex_PIPELINING) regex_PIPELINING =
8058 regex_must_compile(US"\\n250[\\s\\-]PIPELINING(\\s|\\n|$)", FALSE, TRUE);
8060 if (!regex_SIZE) regex_SIZE =
8061 regex_must_compile(US"\\n250[\\s\\-]SIZE(\\s|\\n|$)", FALSE, TRUE);
8063 if (!regex_AUTH) regex_AUTH =
8064 regex_must_compile(US"\\n250[\\s\\-]AUTH\\s+([\\-\\w\\s]+)(?:\\n|$)",
8068 if (!regex_STARTTLS) regex_STARTTLS =
8069 regex_must_compile(US"\\n250[\\s\\-]STARTTLS(\\s|\\n|$)", FALSE, TRUE);
8072 #ifndef DISABLE_PRDR
8073 if (!regex_PRDR) regex_PRDR =
8074 regex_must_compile(US"\\n250[\\s\\-]PRDR(\\s|\\n|$)", FALSE, TRUE);
8078 if (!regex_UTF8) regex_UTF8 =
8079 regex_must_compile(US"\\n250[\\s\\-]SMTPUTF8(\\s|\\n|$)", FALSE, TRUE);
8082 if (!regex_DSN) regex_DSN =
8083 regex_must_compile(US"\\n250[\\s\\-]DSN(\\s|\\n|$)", FALSE, TRUE);
8085 if (!regex_IGNOREQUOTA) regex_IGNOREQUOTA =
8086 regex_must_compile(US"\\n250[\\s\\-]IGNOREQUOTA(\\s|\\n|$)", FALSE, TRUE);
8091 deliver_get_sender_address (uschar * id)
8094 uschar * new_sender_address,
8095 * save_sender_address;
8097 if (!spool_open_datafile(id))
8100 /* Save and restore the global sender_address. I'm not sure if we should
8101 not save/restore all the other global variables too, because
8102 spool_read_header() may change all of them. But OTOH, when this
8103 deliver_get_sender_address() gets called, the current message is done
8104 already and nobody needs the globals anymore. (HS12, 2015-08-21) */
8106 sprintf(CS spoolname, "%s-H", id);
8107 save_sender_address = sender_address;
8109 rc = spool_read_header(spoolname, TRUE, TRUE);
8111 new_sender_address = sender_address;
8112 sender_address = save_sender_address;
8114 if (rc != spool_read_OK)
8117 assert(new_sender_address);
8119 (void)close(deliver_datafile);
8120 deliver_datafile = -1;
8122 return new_sender_address;
8127 /* End of deliver.c */