4 * This module is an SMTP and ESMTP implementation for the Citadel system.
5 * It is compliant with all of the following:
7 * RFC 821 - Simple Mail Transfer Protocol
8 * RFC 876 - Survey of SMTP Implementations
9 * RFC 1047 - Duplicate messages and SMTP
10 * RFC 1652 - 8 bit MIME
11 * RFC 1869 - Extended Simple Mail Transfer Protocol
12 * RFC 1870 - SMTP Service Extension for Message Size Declaration
13 * RFC 2033 - Local Mail Transfer Protocol
14 * RFC 2197 - SMTP Service Extension for Command Pipelining
15 * RFC 2476 - Message Submission
16 * RFC 2487 - SMTP Service Extension for Secure SMTP over TLS
17 * RFC 2554 - SMTP Service Extension for Authentication
18 * RFC 2821 - Simple Mail Transfer Protocol
19 * RFC 2822 - Internet Message Format
20 * RFC 2920 - SMTP Service Extension for Command Pipelining
22 * The VRFY and EXPN commands have been removed from this implementation
23 * because nobody uses these commands anymore, except for spammers.
35 #include <sys/types.h>
38 #if TIME_WITH_SYS_TIME
39 # include <sys/time.h>
43 # include <sys/time.h>
53 #include <sys/socket.h>
54 #include <netinet/in.h>
55 #include <arpa/inet.h>
56 #include <libcitadel.h>
59 #include "citserver.h"
68 #include "internet_addressing.h"
71 #include "clientsocket.h"
72 #include "locate_host.h"
73 #include "citadel_dirs.h"
82 #include "ctdl_module.h"
86 struct citsmtp { /* Information about the current session */
91 int number_of_recipients;
93 int message_originated_locally;
99 enum { /* Command states for login authentication */
106 #define SMTP ((struct citsmtp *)CC->session_specific_data)
109 int run_queue_now = 0; /* Set to 1 to ignore SMTP send retry times */
113 /*****************************************************************************/
114 /* SMTP SERVER (INBOUND) STUFF */
115 /*****************************************************************************/
119 * Here's where our SMTP session begins its happy day.
121 void smtp_greeting(int is_msa)
123 char message_to_spammer[1024];
125 strcpy(CC->cs_clientname, "SMTP session");
126 CC->internal_pgm = 1;
127 CC->cs_flags |= CS_STEALTH;
128 CC->session_specific_data = malloc(sizeof(struct citsmtp));
129 memset(SMTP, 0, sizeof(struct citsmtp));
130 SMTP->is_msa = is_msa;
132 /* If this config option is set, reject connections from problem
133 * addresses immediately instead of after they execute a RCPT
135 if ( (config.c_rbl_at_greeting) && (SMTP->is_msa == 0) ) {
136 if (rbl_check(message_to_spammer)) {
137 if (CtdlThreadCheckStop())
138 cprintf("421 %s\r\n", message_to_spammer);
140 cprintf("550 %s\r\n", message_to_spammer);
142 /* no need to free_recipients(valid), it's not allocated yet */
147 /* Otherwise we're either clean or we check later. */
149 if (CC->nologin==1) {
150 cprintf("500 Too many users are already online (maximum is %d)\r\n",
154 /* no need to free_recipients(valid), it's not allocated yet */
158 /* Note: the FQDN *must* appear as the first thing after the 220 code.
159 * Some clients (including citmail.c) depend on it being there.
161 cprintf("220 %s ESMTP Citadel server ready.\r\n", config.c_fqdn);
166 * SMTPS is just like SMTP, except it goes crypto right away.
168 void smtps_greeting(void) {
169 CtdlModuleStartCryptoMsgs(NULL, NULL, NULL);
171 if (!CC->redirect_ssl) CC->kill_me = 1; /* kill session if no crypto */
178 * SMTP MSA port requires authentication.
180 void smtp_msa_greeting(void) {
186 * LMTP is like SMTP but with some extra bonus footage added.
188 void lmtp_greeting(void) {
195 * Generic SMTP MTA greeting
197 void smtp_mta_greeting(void) {
203 * We also have an unfiltered LMTP socket that bypasses spam filters.
205 void lmtp_unfiltered_greeting(void) {
208 SMTP->is_unfiltered = 1;
213 * Login greeting common to all auth methods
215 void smtp_auth_greeting(void) {
216 cprintf("235 Hello, %s\r\n", CC->user.fullname);
217 CtdlLogPrintf(CTDL_NOTICE, "SMTP authenticated %s\n", CC->user.fullname);
218 CC->internal_pgm = 0;
219 CC->cs_flags &= ~CS_STEALTH;
224 * Implement HELO and EHLO commands.
226 * which_command: 0=HELO, 1=EHLO, 2=LHLO
228 void smtp_hello(char *argbuf, int which_command) {
230 safestrncpy(SMTP->helo_node, argbuf, sizeof SMTP->helo_node);
232 if ( (which_command != 2) && (SMTP->is_lmtp) ) {
233 cprintf("500 Only LHLO is allowed when running LMTP\r\n");
237 if ( (which_command == 2) && (SMTP->is_lmtp == 0) ) {
238 cprintf("500 LHLO is only allowed when running LMTP\r\n");
242 if (which_command == 0) {
243 cprintf("250 Hello %s (%s [%s])\r\n",
250 if (which_command == 1) {
251 cprintf("250-Hello %s (%s [%s])\r\n",
258 cprintf("250-Greetings and joyous salutations.\r\n");
260 cprintf("250-HELP\r\n");
261 cprintf("250-SIZE %ld\r\n", config.c_maxmsglen);
265 * Offer TLS, but only if TLS is not already active.
266 * Furthermore, only offer TLS when running on
267 * the SMTP-MSA port, not on the SMTP-MTA port, due to
268 * questionable reliability of TLS in certain sending MTA's.
270 if ( (!CC->redirect_ssl) && (SMTP->is_msa) ) {
271 cprintf("250-STARTTLS\r\n");
273 #endif /* HAVE_OPENSSL */
275 cprintf("250-AUTH LOGIN PLAIN\r\n"
276 "250-AUTH=LOGIN PLAIN\r\n"
285 * Implement HELP command.
287 void smtp_help(void) {
288 cprintf("214 RTFM http://www.ietf.org/rfc/rfc2821.txt\r\n");
295 void smtp_get_user(char *argbuf) {
299 CtdlDecodeBase64(username, argbuf, SIZ);
300 /* CtdlLogPrintf(CTDL_DEBUG, "Trying <%s>\n", username); */
301 if (CtdlLoginExistingUser(NULL, username) == login_ok) {
302 CtdlEncodeBase64(buf, "Password:", 9, 0);
303 cprintf("334 %s\r\n", buf);
304 SMTP->command_state = smtp_password;
307 cprintf("500 No such user.\r\n");
308 SMTP->command_state = smtp_command;
316 void smtp_get_pass(char *argbuf) {
319 CtdlDecodeBase64(password, argbuf, SIZ);
320 /* CtdlLogPrintf(CTDL_DEBUG, "Trying <%s>\n", password); */
321 if (CtdlTryPassword(password) == pass_ok) {
322 smtp_auth_greeting();
325 cprintf("535 Authentication failed.\r\n");
327 SMTP->command_state = smtp_command;
332 * Back end for PLAIN auth method (either inline or multistate)
334 void smtp_try_plain(char *encoded_authstring) {
335 char decoded_authstring[1024];
341 CtdlDecodeBase64(decoded_authstring, encoded_authstring, strlen(encoded_authstring) );
342 safestrncpy(ident, decoded_authstring, sizeof ident);
343 safestrncpy(user, &decoded_authstring[strlen(ident) + 1], sizeof user);
344 safestrncpy(pass, &decoded_authstring[strlen(ident) + strlen(user) + 2], sizeof pass);
346 SMTP->command_state = smtp_command;
348 if (!IsEmptyStr(ident)) {
349 result = CtdlLoginExistingUser(user, ident);
352 result = CtdlLoginExistingUser(NULL, user);
355 if (result == login_ok) {
356 if (CtdlTryPassword(pass) == pass_ok) {
357 smtp_auth_greeting();
361 cprintf("504 Authentication failed.\r\n");
366 * Attempt to perform authenticated SMTP
368 void smtp_auth(char *argbuf) {
369 char username_prompt[64];
371 char encoded_authstring[1024];
374 cprintf("504 Already logged in.\r\n");
378 extract_token(method, argbuf, 0, ' ', sizeof method);
380 if (!strncasecmp(method, "login", 5) ) {
381 if (strlen(argbuf) >= 7) {
382 smtp_get_user(&argbuf[6]);
385 CtdlEncodeBase64(username_prompt, "Username:", 9, 0);
386 cprintf("334 %s\r\n", username_prompt);
387 SMTP->command_state = smtp_user;
392 if (!strncasecmp(method, "plain", 5) ) {
393 if (num_tokens(argbuf, ' ') < 2) {
395 SMTP->command_state = smtp_plain;
399 extract_token(encoded_authstring, argbuf, 1, ' ', sizeof encoded_authstring);
401 smtp_try_plain(encoded_authstring);
405 if (strncasecmp(method, "login", 5) ) {
406 cprintf("504 Unknown authentication method.\r\n");
414 * Implements the RSET (reset state) command.
415 * Currently this just zeroes out the state buffer. If pointers to data
416 * allocated with malloc() are ever placed in the state buffer, we have to
417 * be sure to free() them first!
419 * Set do_response to nonzero to output the SMTP RSET response code.
421 void smtp_rset(int do_response) {
426 * Our entire SMTP state is discarded when a RSET command is issued,
427 * but we need to preserve this one little piece of information, so
428 * we save it for later.
430 is_lmtp = SMTP->is_lmtp;
431 is_unfiltered = SMTP->is_unfiltered;
433 memset(SMTP, 0, sizeof(struct citsmtp));
436 * It is somewhat ambiguous whether we want to log out when a RSET
437 * command is issued. Here's the code to do it. It is commented out
438 * because some clients (such as Pine) issue RSET commands before
439 * each message, but still expect to be logged in.
441 * if (CC->logged_in) {
447 * Reinstate this little piece of information we saved (see above).
449 SMTP->is_lmtp = is_lmtp;
450 SMTP->is_unfiltered = is_unfiltered;
453 cprintf("250 Zap!\r\n");
458 * Clear out the portions of the state buffer that need to be cleared out
459 * after the DATA command finishes.
461 void smtp_data_clear(void) {
462 strcpy(SMTP->from, "");
463 strcpy(SMTP->recipients, "");
464 SMTP->number_of_recipients = 0;
465 SMTP->delivery_mode = 0;
466 SMTP->message_originated_locally = 0;
469 const char *smtp_get_Recipients(void)
473 else return SMTP->from;
478 * Implements the "MAIL From:" command
480 void smtp_mail(char *argbuf) {
485 if (!IsEmptyStr(SMTP->from)) {
486 cprintf("503 Only one sender permitted\r\n");
490 if (strncasecmp(argbuf, "From:", 5)) {
491 cprintf("501 Syntax error\r\n");
495 strcpy(SMTP->from, &argbuf[5]);
497 if (haschar(SMTP->from, '<') > 0) {
498 stripallbut(SMTP->from, '<', '>');
501 /* We used to reject empty sender names, until it was brought to our
502 * attention that RFC1123 5.2.9 requires that this be allowed. So now
503 * we allow it, but replace the empty string with a fake
504 * address so we don't have to contend with the empty string causing
505 * other code to fail when it's expecting something there.
507 if (IsEmptyStr(SMTP->from)) {
508 strcpy(SMTP->from, "someone@example.com");
511 /* If this SMTP connection is from a logged-in user, force the 'from'
512 * to be the user's Internet e-mail address as Citadel knows it.
515 safestrncpy(SMTP->from, CC->cs_inet_email, sizeof SMTP->from);
516 cprintf("250 Sender ok <%s>\r\n", SMTP->from);
517 SMTP->message_originated_locally = 1;
521 else if (SMTP->is_lmtp) {
522 /* Bypass forgery checking for LMTP */
525 /* Otherwise, make sure outsiders aren't trying to forge mail from
526 * this system (unless, of course, c_allow_spoofing is enabled)
528 else if (config.c_allow_spoofing == 0) {
529 process_rfc822_addr(SMTP->from, user, node, name);
530 if (CtdlHostAlias(node) != hostalias_nomatch) {
531 cprintf("550 You must log in to send mail from %s\r\n", node);
532 strcpy(SMTP->from, "");
537 cprintf("250 Sender ok\r\n");
543 * Implements the "RCPT To:" command
545 void smtp_rcpt(char *argbuf) {
547 char message_to_spammer[SIZ];
548 struct recptypes *valid = NULL;
550 if (IsEmptyStr(SMTP->from)) {
551 cprintf("503 Need MAIL before RCPT\r\n");
555 if (strncasecmp(argbuf, "To:", 3)) {
556 cprintf("501 Syntax error\r\n");
560 if ( (SMTP->is_msa) && (!CC->logged_in) ) {
561 cprintf("550 You must log in to send mail on this port.\r\n");
562 strcpy(SMTP->from, "");
566 safestrncpy(recp, &argbuf[3], sizeof recp);
568 stripallbut(recp, '<', '>');
570 if ( (strlen(recp) + strlen(SMTP->recipients) + 1 ) >= SIZ) {
571 cprintf("452 Too many recipients\r\n");
576 if ( (!CC->logged_in) /* Don't RBL authenticated users */
577 && (!SMTP->is_lmtp) ) { /* Don't RBL LMTP clients */
578 if (config.c_rbl_at_greeting == 0) { /* Don't RBL again if we already did it */
579 if (rbl_check(message_to_spammer)) {
580 if (CtdlThreadCheckStop())
581 cprintf("421 %s\r\n", message_to_spammer);
583 cprintf("550 %s\r\n", message_to_spammer);
584 /* no need to free_recipients(valid), it's not allocated yet */
590 valid = validate_recipients(recp,
591 smtp_get_Recipients (),
592 (SMTP->is_lmtp)? POST_LMTP:
593 (CC->logged_in)? POST_LOGGED_IN:
595 if (valid->num_error != 0) {
596 cprintf("550 %s\r\n", valid->errormsg);
597 free_recipients(valid);
601 if (valid->num_internet > 0) {
603 if (CtdlCheckInternetMailPermission(&CC->user)==0) {
604 cprintf("551 <%s> - you do not have permission to send Internet mail\r\n", recp);
605 free_recipients(valid);
611 if (valid->num_internet > 0) {
612 if ( (SMTP->message_originated_locally == 0)
613 && (SMTP->is_lmtp == 0) ) {
614 cprintf("551 <%s> - relaying denied\r\n", recp);
615 free_recipients(valid);
620 cprintf("250 RCPT ok <%s>\r\n", recp);
621 if (!IsEmptyStr(SMTP->recipients)) {
622 strcat(SMTP->recipients, ",");
624 strcat(SMTP->recipients, recp);
625 SMTP->number_of_recipients += 1;
627 free_recipients(valid);
635 * Implements the DATA command
637 void smtp_data(void) {
639 struct CtdlMessage *msg = NULL;
642 struct recptypes *valid;
647 if (IsEmptyStr(SMTP->from)) {
648 cprintf("503 Need MAIL command first.\r\n");
652 if (SMTP->number_of_recipients < 1) {
653 cprintf("503 Need RCPT command first.\r\n");
657 cprintf("354 Transmit message now - terminate with '.' by itself\r\n");
659 datestring(nowstamp, sizeof nowstamp, time(NULL), DATESTRING_RFC822);
662 if (body != NULL) snprintf(body, 4096,
663 "Received: from %s (%s [%s])\n"
671 body = CtdlReadMessageBody(".", config.c_maxmsglen, body, 1, 0);
673 cprintf("550 Unable to save message: internal error.\r\n");
677 CtdlLogPrintf(CTDL_DEBUG, "Converting message...\n");
678 msg = convert_internet_message(body);
680 /* If the user is locally authenticated, FORCE the From: header to
681 * show up as the real sender. Yes, this violates the RFC standard,
682 * but IT MAKES SENSE. If you prefer strict RFC adherence over
683 * common sense, you can disable this in the configuration.
685 * We also set the "message room name" ('O' field) to MAILROOM
686 * (which is Mail> on most systems) to prevent it from getting set
687 * to something ugly like "0000058008.Sent Items>" when the message
688 * is read with a Citadel client.
690 if ( (CC->logged_in) && (config.c_rfc822_strict_from == 0) ) {
691 if (msg->cm_fields['A'] != NULL) free(msg->cm_fields['A']);
692 if (msg->cm_fields['N'] != NULL) free(msg->cm_fields['N']);
693 if (msg->cm_fields['H'] != NULL) free(msg->cm_fields['H']);
694 if (msg->cm_fields['F'] != NULL) free(msg->cm_fields['F']);
695 if (msg->cm_fields['O'] != NULL) free(msg->cm_fields['O']);
696 msg->cm_fields['A'] = strdup(CC->user.fullname);
697 msg->cm_fields['N'] = strdup(config.c_nodename);
698 msg->cm_fields['H'] = strdup(config.c_humannode);
699 msg->cm_fields['F'] = strdup(CC->cs_inet_email);
700 msg->cm_fields['O'] = strdup(MAILROOM);
703 /* Set the "envelope from" address */
704 if (msg->cm_fields['P'] != NULL) {
705 free(msg->cm_fields['P']);
707 msg->cm_fields['P'] = strdup(SMTP->from);
709 /* Set the "envelope to" address */
710 if (msg->cm_fields['V'] != NULL) {
711 free(msg->cm_fields['V']);
713 msg->cm_fields['V'] = strdup(SMTP->recipients);
715 /* Submit the message into the Citadel system. */
716 valid = validate_recipients(SMTP->recipients,
717 smtp_get_Recipients (),
718 (SMTP->is_lmtp)? POST_LMTP:
719 (CC->logged_in)? POST_LOGGED_IN:
722 /* If there are modules that want to scan this message before final
723 * submission (such as virus checkers or spam filters), call them now
724 * and give them an opportunity to reject the message.
726 if (SMTP->is_unfiltered) {
730 scan_errors = PerformMessageHooks(msg, EVT_SMTPSCAN);
733 if (scan_errors > 0) { /* We don't want this message! */
735 if (msg->cm_fields['0'] == NULL) {
736 msg->cm_fields['0'] = strdup("Message rejected by filter");
739 sprintf(result, "550 %s\r\n", msg->cm_fields['0']);
742 else { /* Ok, we'll accept this message. */
743 msgnum = CtdlSubmitMsg(msg, valid, "", 0);
745 sprintf(result, "250 Message accepted.\r\n");
748 sprintf(result, "550 Internal delivery error\r\n");
752 /* For SMTP and ESTMP, just print the result message. For LMTP, we
753 * have to print one result message for each recipient. Since there
754 * is nothing in Citadel which would cause different recipients to
755 * have different results, we can get away with just spitting out the
756 * same message once for each recipient.
759 for (i=0; i<SMTP->number_of_recipients; ++i) {
760 cprintf("%s", result);
764 cprintf("%s", result);
767 /* Write something to the syslog (which may or may not be where the
768 * rest of the Citadel logs are going; some sysadmins want LOG_MAIL).
771 syslog((LOG_MAIL | LOG_INFO),
772 "%ld: from=<%s>, nrcpts=%d, relay=%s [%s], stat=%s",
775 SMTP->number_of_recipients,
783 CtdlFreeMessage(msg);
784 free_recipients(valid);
785 smtp_data_clear(); /* clear out the buffers now */
790 * implements the STARTTLS command (Citadel API version)
792 void smtp_starttls(void)
794 char ok_response[SIZ];
795 char nosup_response[SIZ];
796 char error_response[SIZ];
799 "220 Begin TLS negotiation now\r\n");
800 sprintf(nosup_response,
801 "554 TLS not supported here\r\n");
802 sprintf(error_response,
803 "554 Internal error\r\n");
804 CtdlModuleStartCryptoMsgs(ok_response, nosup_response, error_response);
811 * Main command loop for SMTP sessions.
813 void smtp_command_loop(void) {
817 memset(cmdbuf, 0, sizeof cmdbuf); /* Clear it, just in case */
818 if (client_getln(cmdbuf, sizeof cmdbuf) < 1) {
819 CtdlLogPrintf(CTDL_CRIT, "Client disconnected: ending session.\n");
823 CtdlLogPrintf(CTDL_INFO, "SMTP server: %s\n", cmdbuf);
824 while (strlen(cmdbuf) < 5) strcat(cmdbuf, " ");
826 if (SMTP->command_state == smtp_user) {
827 smtp_get_user(cmdbuf);
830 else if (SMTP->command_state == smtp_password) {
831 smtp_get_pass(cmdbuf);
834 else if (SMTP->command_state == smtp_plain) {
835 smtp_try_plain(cmdbuf);
838 else if (!strncasecmp(cmdbuf, "AUTH", 4)) {
839 smtp_auth(&cmdbuf[5]);
842 else if (!strncasecmp(cmdbuf, "DATA", 4)) {
846 else if (!strncasecmp(cmdbuf, "HELO", 4)) {
847 smtp_hello(&cmdbuf[5], 0);
850 else if (!strncasecmp(cmdbuf, "EHLO", 4)) {
851 smtp_hello(&cmdbuf[5], 1);
854 else if (!strncasecmp(cmdbuf, "LHLO", 4)) {
855 smtp_hello(&cmdbuf[5], 2);
858 else if (!strncasecmp(cmdbuf, "HELP", 4)) {
862 else if (!strncasecmp(cmdbuf, "MAIL", 4)) {
863 smtp_mail(&cmdbuf[5]);
866 else if (!strncasecmp(cmdbuf, "NOOP", 4)) {
867 cprintf("250 NOOP\r\n");
870 else if (!strncasecmp(cmdbuf, "QUIT", 4)) {
871 cprintf("221 Goodbye...\r\n");
876 else if (!strncasecmp(cmdbuf, "RCPT", 4)) {
877 smtp_rcpt(&cmdbuf[5]);
880 else if (!strncasecmp(cmdbuf, "RSET", 4)) {
884 else if (!strcasecmp(cmdbuf, "STARTTLS")) {
889 cprintf("502 I'm afraid I can't do that.\r\n");
898 /*****************************************************************************/
899 /* SMTP CLIENT (OUTBOUND PROCESSING) STUFF */
900 /*****************************************************************************/
907 * Called by smtp_do_procmsg() to attempt delivery to one SMTP host
910 void smtp_try(const char *key, const char *addr, int *status,
911 char *dsn, size_t n, long msgnum)
918 char user[1024], node[1024], name[1024];
932 /* Parse out the host portion of the recipient address */
933 process_rfc822_addr(addr, user, node, name);
935 CtdlLogPrintf(CTDL_DEBUG, "SMTP client: Attempting delivery to <%s> @ <%s> (%s)\n",
938 /* Load the message out of the database */
939 CC->redirect_buffer = malloc(SIZ);
940 CC->redirect_len = 0;
941 CC->redirect_alloc = SIZ;
942 CtdlOutputMsg(msgnum, MT_RFC822, HEADERS_ALL, 0, 1, NULL, ESC_DOT);
943 msgtext = CC->redirect_buffer;
944 msg_size = CC->redirect_len;
945 CC->redirect_buffer = NULL;
946 CC->redirect_len = 0;
947 CC->redirect_alloc = 0;
949 /* Extract something to send later in the 'MAIL From:' command */
950 strcpy(mailfrom, "");
954 if (ptr = memreadline(ptr, buf, sizeof buf), *ptr == 0) {
957 if (!strncasecmp(buf, "From:", 5)) {
958 safestrncpy(mailfrom, &buf[5], sizeof mailfrom);
960 for (i=0; mailfrom[i]; ++i) {
961 if (!isprint(mailfrom[i])) {
962 strcpy(&mailfrom[i], &mailfrom[i+1]);
967 /* Strip out parenthesized names */
970 for (i=0; mailfrom[i]; ++i) {
971 if (mailfrom[i] == '(') lp = i;
972 if (mailfrom[i] == ')') rp = i;
974 if ((lp>0)&&(rp>lp)) {
975 strcpy(&mailfrom[lp-1], &mailfrom[rp+1]);
978 /* Prefer brokketized names */
981 for (i=0; mailfrom[i]; ++i) {
982 if (mailfrom[i] == '<') lp = i;
983 if (mailfrom[i] == '>') rp = i;
985 if ( (lp>=0) && (rp>lp) ) {
987 strcpy(mailfrom, &mailfrom[lp]);
992 } while (scan_done == 0);
993 if (IsEmptyStr(mailfrom)) strcpy(mailfrom, "someone@somewhere.org");
994 stripallbut(mailfrom, '<', '>');
996 /* Figure out what mail exchanger host we have to connect to */
997 num_mxhosts = getmx(mxhosts, node);
998 CtdlLogPrintf(CTDL_DEBUG, "Number of MX hosts for <%s> is %d\n", node, num_mxhosts);
999 if (num_mxhosts < 1) {
1001 snprintf(dsn, SIZ, "No MX hosts found for <%s>", node);
1006 for (mx=0; (mx<num_mxhosts && sock < 0); ++mx) {
1008 extract_token(buf, mxhosts, mx, '|', sizeof buf);
1009 strcpy(mx_user, "");
1010 strcpy(mx_pass, "");
1011 if (num_tokens(buf, '@') > 1) {
1012 strcpy (mx_user, buf);
1013 endpart = strrchr(mx_user, '@');
1015 strcpy (mx_host, endpart + 1);
1016 endpart = strrchr(mx_user, ':');
1017 if (endpart != NULL) {
1018 strcpy(mx_pass, endpart+1);
1023 strcpy (mx_host, buf);
1024 endpart = strrchr(mx_host, ':');
1027 strcpy(mx_port, endpart + 1);
1030 strcpy(mx_port, "25");
1032 CtdlLogPrintf(CTDL_DEBUG, "SMTP client: connecting to %s : %s ...\n", mx_host, mx_port);
1033 sock = sock_connect(mx_host, mx_port, "tcp");
1034 snprintf(dsn, SIZ, "Could not connect: %s", strerror(errno));
1035 if (sock >= 0) CtdlLogPrintf(CTDL_DEBUG, "SMTP client: connected!\n");
1038 snprintf(dsn, SIZ, "%s", strerror(errno));
1041 snprintf(dsn, SIZ, "Unable to connect to %s : %s\n", mx_host, mx_port);
1047 *status = 4; /* dsn is already filled in */
1051 /* Process the SMTP greeting from the server */
1052 if (ml_sock_gets(sock, buf) < 0) {
1054 strcpy(dsn, "Connection broken during SMTP conversation");
1057 CtdlLogPrintf(CTDL_DEBUG, "<%s\n", buf);
1058 if (buf[0] != '2') {
1059 if (buf[0] == '4') {
1061 safestrncpy(dsn, &buf[4], 1023);
1066 safestrncpy(dsn, &buf[4], 1023);
1071 /* At this point we know we are talking to a real SMTP server */
1073 /* Do a EHLO command. If it fails, try the HELO command. */
1074 snprintf(buf, sizeof buf, "EHLO %s\r\n", config.c_fqdn);
1075 CtdlLogPrintf(CTDL_DEBUG, ">%s", buf);
1076 sock_write(sock, buf, strlen(buf));
1077 if (ml_sock_gets(sock, buf) < 0) {
1079 strcpy(dsn, "Connection broken during SMTP HELO");
1082 CtdlLogPrintf(CTDL_DEBUG, "<%s\n", buf);
1083 if (buf[0] != '2') {
1084 snprintf(buf, sizeof buf, "HELO %s\r\n", config.c_fqdn);
1085 CtdlLogPrintf(CTDL_DEBUG, ">%s", buf);
1086 sock_write(sock, buf, strlen(buf));
1087 if (ml_sock_gets(sock, buf) < 0) {
1089 strcpy(dsn, "Connection broken during SMTP HELO");
1093 if (buf[0] != '2') {
1094 if (buf[0] == '4') {
1096 safestrncpy(dsn, &buf[4], 1023);
1101 safestrncpy(dsn, &buf[4], 1023);
1106 /* Do an AUTH command if necessary */
1107 if (!IsEmptyStr(mx_user)) {
1109 sprintf(buf, "%s%c%s%c%s", mx_user, '\0', mx_user, '\0', mx_pass);
1110 CtdlEncodeBase64(encoded, buf, strlen(mx_user) + strlen(mx_user) + strlen(mx_pass) + 2, 0);
1111 snprintf(buf, sizeof buf, "AUTH PLAIN %s\r\n", encoded);
1112 CtdlLogPrintf(CTDL_DEBUG, ">%s", buf);
1113 sock_write(sock, buf, strlen(buf));
1114 if (ml_sock_gets(sock, buf) < 0) {
1116 strcpy(dsn, "Connection broken during SMTP AUTH");
1119 CtdlLogPrintf(CTDL_DEBUG, "<%s\n", buf);
1120 if (buf[0] != '2') {
1121 if (buf[0] == '4') {
1123 safestrncpy(dsn, &buf[4], 1023);
1128 safestrncpy(dsn, &buf[4], 1023);
1134 /* previous command succeeded, now try the MAIL From: command */
1135 snprintf(buf, sizeof buf, "MAIL From: <%s>\r\n", mailfrom);
1136 CtdlLogPrintf(CTDL_DEBUG, ">%s", buf);
1137 sock_write(sock, buf, strlen(buf));
1138 if (ml_sock_gets(sock, buf) < 0) {
1140 strcpy(dsn, "Connection broken during SMTP MAIL");
1143 CtdlLogPrintf(CTDL_DEBUG, "<%s\n", buf);
1144 if (buf[0] != '2') {
1145 if (buf[0] == '4') {
1147 safestrncpy(dsn, &buf[4], 1023);
1152 safestrncpy(dsn, &buf[4], 1023);
1157 /* MAIL succeeded, now try the RCPT To: command */
1158 snprintf(buf, sizeof buf, "RCPT To: <%s@%s>\r\n", user, node);
1159 CtdlLogPrintf(CTDL_DEBUG, ">%s", buf);
1160 sock_write(sock, buf, strlen(buf));
1161 if (ml_sock_gets(sock, buf) < 0) {
1163 strcpy(dsn, "Connection broken during SMTP RCPT");
1166 CtdlLogPrintf(CTDL_DEBUG, "<%s\n", buf);
1167 if (buf[0] != '2') {
1168 if (buf[0] == '4') {
1170 safestrncpy(dsn, &buf[4], 1023);
1175 safestrncpy(dsn, &buf[4], 1023);
1180 /* RCPT succeeded, now try the DATA command */
1181 CtdlLogPrintf(CTDL_DEBUG, ">DATA\n");
1182 sock_write(sock, "DATA\r\n", 6);
1183 if (ml_sock_gets(sock, buf) < 0) {
1185 strcpy(dsn, "Connection broken during SMTP DATA");
1188 CtdlLogPrintf(CTDL_DEBUG, "<%s\n", buf);
1189 if (buf[0] != '3') {
1190 if (buf[0] == '4') {
1192 safestrncpy(dsn, &buf[4], 1023);
1197 safestrncpy(dsn, &buf[4], 1023);
1202 /* If we reach this point, the server is expecting data.*/
1203 sock_write(sock, msgtext, msg_size);
1204 if (msgtext[msg_size-1] != 10) {
1205 CtdlLogPrintf(CTDL_WARNING, "Possible problem: message did not "
1206 "correctly terminate. (expecting 0x10, got 0x%02x)\n",
1210 sock_write(sock, ".\r\n", 3);
1211 if (ml_sock_gets(sock, buf) < 0) {
1213 strcpy(dsn, "Connection broken during SMTP message transmit");
1216 CtdlLogPrintf(CTDL_DEBUG, "%s\n", buf);
1217 if (buf[0] != '2') {
1218 if (buf[0] == '4') {
1220 safestrncpy(dsn, &buf[4], 1023);
1225 safestrncpy(dsn, &buf[4], 1023);
1231 safestrncpy(dsn, &buf[4], 1023);
1234 CtdlLogPrintf(CTDL_DEBUG, ">QUIT\n");
1235 sock_write(sock, "QUIT\r\n", 6);
1236 ml_sock_gets(sock, buf);
1237 CtdlLogPrintf(CTDL_DEBUG, "<%s\n", buf);
1238 CtdlLogPrintf(CTDL_INFO, "SMTP client: delivery to <%s> @ <%s> (%s) succeeded\n",
1241 bail: free(msgtext);
1244 /* Write something to the syslog (which may or may not be where the
1245 * rest of the Citadel logs are going; some sysadmins want LOG_MAIL).
1247 if (enable_syslog) {
1248 syslog((LOG_MAIL | LOG_INFO),
1249 "%ld: to=<%s>, relay=%s, stat=%s",
1263 * smtp_do_bounce() is caled by smtp_do_procmsg() to scan a set of delivery
1264 * instructions for "5" codes (permanent fatal errors) and produce/deliver
1265 * a "bounce" message (delivery status notification).
1267 void smtp_do_bounce(char *instr) {
1275 char bounceto[1024];
1277 int num_bounces = 0;
1278 int bounce_this = 0;
1279 long bounce_msgid = (-1);
1280 time_t submitted = 0L;
1281 struct CtdlMessage *bmsg = NULL;
1283 struct recptypes *valid;
1284 int successful_bounce = 0;
1290 CtdlLogPrintf(CTDL_DEBUG, "smtp_do_bounce() called\n");
1291 strcpy(bounceto, "");
1292 sprintf(boundary, "=_Citadel_Multipart_%s_%04x%04x", config.c_fqdn, getpid(), ++seq);
1293 lines = num_tokens(instr, '\n');
1295 /* See if it's time to give up on delivery of this message */
1296 for (i=0; i<lines; ++i) {
1297 extract_token(buf, instr, i, '\n', sizeof buf);
1298 extract_token(key, buf, 0, '|', sizeof key);
1299 extract_token(addr, buf, 1, '|', sizeof addr);
1300 if (!strcasecmp(key, "submitted")) {
1301 submitted = atol(addr);
1305 if ( (time(NULL) - submitted) > SMTP_GIVE_UP ) {
1309 /* Start building our bounce message */
1311 bmsg = (struct CtdlMessage *) malloc(sizeof(struct CtdlMessage));
1312 if (bmsg == NULL) return;
1313 memset(bmsg, 0, sizeof(struct CtdlMessage));
1315 bmsg->cm_magic = CTDLMESSAGE_MAGIC;
1316 bmsg->cm_anon_type = MES_NORMAL;
1317 bmsg->cm_format_type = FMT_RFC822;
1318 bmsg->cm_fields['A'] = strdup("Citadel");
1319 bmsg->cm_fields['O'] = strdup(MAILROOM);
1320 bmsg->cm_fields['N'] = strdup(config.c_nodename);
1321 bmsg->cm_fields['U'] = strdup("Delivery Status Notification (Failure)");
1322 bmsg->cm_fields['M'] = malloc(1024);
1324 strcpy(bmsg->cm_fields['M'], "Content-type: multipart/mixed; boundary=\"");
1325 strcat(bmsg->cm_fields['M'], boundary);
1326 strcat(bmsg->cm_fields['M'], "\"\r\n");
1327 strcat(bmsg->cm_fields['M'], "MIME-Version: 1.0\r\n");
1328 strcat(bmsg->cm_fields['M'], "X-Mailer: " CITADEL "\r\n");
1329 strcat(bmsg->cm_fields['M'], "\r\nThis is a multipart message in MIME format.\r\n\r\n");
1330 strcat(bmsg->cm_fields['M'], "--");
1331 strcat(bmsg->cm_fields['M'], boundary);
1332 strcat(bmsg->cm_fields['M'], "\r\n");
1333 strcat(bmsg->cm_fields['M'], "Content-type: text/plain\r\n\r\n");
1335 if (give_up) strcat(bmsg->cm_fields['M'],
1336 "A message you sent could not be delivered to some or all of its recipients\n"
1337 "due to prolonged unavailability of its destination(s).\n"
1338 "Giving up on the following addresses:\n\n"
1341 else strcat(bmsg->cm_fields['M'],
1342 "A message you sent could not be delivered to some or all of its recipients.\n"
1343 "The following addresses were undeliverable:\n\n"
1347 * Now go through the instructions checking for stuff.
1349 for (i=0; i<lines; ++i) {
1350 extract_token(buf, instr, i, '\n', sizeof buf);
1351 extract_token(key, buf, 0, '|', sizeof key);
1352 extract_token(addr, buf, 1, '|', sizeof addr);
1353 status = extract_int(buf, 2);
1354 extract_token(dsn, buf, 3, '|', sizeof dsn);
1357 CtdlLogPrintf(CTDL_DEBUG, "key=<%s> addr=<%s> status=%d dsn=<%s>\n",
1358 key, addr, status, dsn);
1360 if (!strcasecmp(key, "bounceto")) {
1361 strcpy(bounceto, addr);
1364 if (!strcasecmp(key, "msgid")) {
1365 omsgid = atol(addr);
1368 if (!strcasecmp(key, "remote")) {
1369 if (status == 5) bounce_this = 1;
1370 if (give_up) bounce_this = 1;
1376 if (bmsg->cm_fields['M'] == NULL) {
1377 CtdlLogPrintf(CTDL_ERR, "ERROR ... M field is null "
1378 "(%s:%d)\n", __FILE__, __LINE__);
1381 bmsg->cm_fields['M'] = realloc(bmsg->cm_fields['M'],
1382 strlen(bmsg->cm_fields['M']) + 1024 );
1383 strcat(bmsg->cm_fields['M'], addr);
1384 strcat(bmsg->cm_fields['M'], ": ");
1385 strcat(bmsg->cm_fields['M'], dsn);
1386 strcat(bmsg->cm_fields['M'], "\r\n");
1388 remove_token(instr, i, '\n');
1394 /* Attach the original message */
1396 strcat(bmsg->cm_fields['M'], "--");
1397 strcat(bmsg->cm_fields['M'], boundary);
1398 strcat(bmsg->cm_fields['M'], "\r\n");
1399 strcat(bmsg->cm_fields['M'], "Content-type: message/rfc822\r\n");
1400 strcat(bmsg->cm_fields['M'], "Content-Transfer-Encoding: 7bit\r\n");
1401 strcat(bmsg->cm_fields['M'], "Content-Disposition: inline\r\n");
1402 strcat(bmsg->cm_fields['M'], "\r\n");
1404 CC->redirect_buffer = malloc(SIZ);
1405 CC->redirect_len = 0;
1406 CC->redirect_alloc = SIZ;
1407 CtdlOutputMsg(omsgid, MT_RFC822, HEADERS_ALL, 0, 1, NULL, 0);
1408 omsgtext = CC->redirect_buffer;
1409 omsgsize = CC->redirect_len;
1410 CC->redirect_buffer = NULL;
1411 CC->redirect_len = 0;
1412 CC->redirect_alloc = 0;
1413 bmsg->cm_fields['M'] = realloc(bmsg->cm_fields['M'],
1414 (strlen(bmsg->cm_fields['M']) + omsgsize + 1024) );
1415 strcat(bmsg->cm_fields['M'], omsgtext);
1419 /* Close the multipart MIME scope */
1420 strcat(bmsg->cm_fields['M'], "--");
1421 strcat(bmsg->cm_fields['M'], boundary);
1422 strcat(bmsg->cm_fields['M'], "--\r\n");
1424 /* Deliver the bounce if there's anything worth mentioning */
1425 CtdlLogPrintf(CTDL_DEBUG, "num_bounces = %d\n", num_bounces);
1426 if (num_bounces > 0) {
1428 /* First try the user who sent the message */
1429 CtdlLogPrintf(CTDL_DEBUG, "bounce to user? <%s>\n", bounceto);
1430 if (IsEmptyStr(bounceto)) {
1431 CtdlLogPrintf(CTDL_ERR, "No bounce address specified\n");
1432 bounce_msgid = (-1L);
1435 /* Can we deliver the bounce to the original sender? */
1436 valid = validate_recipients(bounceto, smtp_get_Recipients (), 0);
1437 if (valid != NULL) {
1438 if (valid->num_error == 0) {
1439 CtdlSubmitMsg(bmsg, valid, "", QP_EADDR);
1440 successful_bounce = 1;
1444 /* If not, post it in the Aide> room */
1445 if (successful_bounce == 0) {
1446 CtdlSubmitMsg(bmsg, NULL, config.c_aideroom, QP_EADDR);
1449 /* Free up the memory we used */
1450 if (valid != NULL) {
1451 free_recipients(valid);
1455 CtdlFreeMessage(bmsg);
1456 CtdlLogPrintf(CTDL_DEBUG, "Done processing bounces\n");
1461 * smtp_purge_completed_deliveries() is caled by smtp_do_procmsg() to scan a
1462 * set of delivery instructions for completed deliveries and remove them.
1464 * It returns the number of incomplete deliveries remaining.
1466 int smtp_purge_completed_deliveries(char *instr) {
1477 lines = num_tokens(instr, '\n');
1478 for (i=0; i<lines; ++i) {
1479 extract_token(buf, instr, i, '\n', sizeof buf);
1480 extract_token(key, buf, 0, '|', sizeof key);
1481 extract_token(addr, buf, 1, '|', sizeof addr);
1482 status = extract_int(buf, 2);
1483 extract_token(dsn, buf, 3, '|', sizeof dsn);
1487 if (!strcasecmp(key, "remote")) {
1488 if (status == 2) completed = 1;
1493 remove_token(instr, i, '\n');
1506 * Called by smtp_do_queue() to handle an individual message.
1508 void smtp_do_procmsg(long msgnum, void *userdata) {
1509 struct CtdlMessage *msg = NULL;
1511 char *results = NULL;
1519 long text_msgid = (-1);
1520 int incomplete_deliveries_remaining;
1521 time_t attempted = 0L;
1522 time_t last_attempted = 0L;
1523 time_t retry = SMTP_RETRY_INTERVAL;
1525 CtdlLogPrintf(CTDL_DEBUG, "SMTP client: smtp_do_procmsg(%ld)\n", msgnum);
1527 msg = CtdlFetchMessage(msgnum, 1);
1529 CtdlLogPrintf(CTDL_ERR, "SMTP client: tried %ld but no such message!\n", msgnum);
1533 instr = strdup(msg->cm_fields['M']);
1534 CtdlFreeMessage(msg);
1536 /* Strip out the headers amd any other non-instruction line */
1537 lines = num_tokens(instr, '\n');
1538 for (i=0; i<lines; ++i) {
1539 extract_token(buf, instr, i, '\n', sizeof buf);
1540 if (num_tokens(buf, '|') < 2) {
1541 remove_token(instr, i, '\n');
1547 /* Learn the message ID and find out about recent delivery attempts */
1548 lines = num_tokens(instr, '\n');
1549 for (i=0; i<lines; ++i) {
1550 extract_token(buf, instr, i, '\n', sizeof buf);
1551 extract_token(key, buf, 0, '|', sizeof key);
1552 if (!strcasecmp(key, "msgid")) {
1553 text_msgid = extract_long(buf, 1);
1555 if (!strcasecmp(key, "retry")) {
1556 /* double the retry interval after each attempt */
1557 retry = extract_long(buf, 1) * 2L;
1558 if (retry > SMTP_RETRY_MAX) {
1559 retry = SMTP_RETRY_MAX;
1561 remove_token(instr, i, '\n');
1563 if (!strcasecmp(key, "attempted")) {
1564 attempted = extract_long(buf, 1);
1565 if (attempted > last_attempted)
1566 last_attempted = attempted;
1571 * Postpone delivery if we've already tried recently.
1573 if (((time(NULL) - last_attempted) < retry) && (run_queue_now == 0)) {
1574 CtdlLogPrintf(CTDL_DEBUG, "SMTP client: Retry time not yet reached.\n");
1581 * Bail out if there's no actual message associated with this
1583 if (text_msgid < 0L) {
1584 CtdlLogPrintf(CTDL_ERR, "SMTP client: no 'msgid' directive found!\n");
1589 /* Plow through the instructions looking for 'remote' directives and
1590 * a status of 0 (no delivery yet attempted) or 3/4 (transient errors
1591 * were experienced and it's time to try again)
1593 lines = num_tokens(instr, '\n');
1594 for (i=0; i<lines; ++i) {
1595 extract_token(buf, instr, i, '\n', sizeof buf);
1596 extract_token(key, buf, 0, '|', sizeof key);
1597 extract_token(addr, buf, 1, '|', sizeof addr);
1598 status = extract_int(buf, 2);
1599 extract_token(dsn, buf, 3, '|', sizeof dsn);
1600 if ( (!strcasecmp(key, "remote"))
1601 && ((status==0)||(status==3)||(status==4)) ) {
1603 /* Remove this "remote" instruction from the set,
1604 * but replace the set's final newline if
1605 * remove_token() stripped it. It has to be there.
1607 remove_token(instr, i, '\n');
1608 if (instr[strlen(instr)-1] != '\n') {
1609 strcat(instr, "\n");
1614 CtdlLogPrintf(CTDL_DEBUG, "SMTP client: Trying <%s>\n", addr);
1615 smtp_try(key, addr, &status, dsn, sizeof dsn, text_msgid);
1617 if (results == NULL) {
1618 results = malloc(1024);
1619 memset(results, 0, 1024);
1622 results = realloc(results, strlen(results) + 1024);
1624 snprintf(&results[strlen(results)], 1024,
1626 key, addr, status, dsn);
1631 if (results != NULL) {
1632 instr = realloc(instr, strlen(instr) + strlen(results) + 2);
1633 strcat(instr, results);
1638 /* Generate 'bounce' messages */
1639 smtp_do_bounce(instr);
1641 /* Go through the delivery list, deleting completed deliveries */
1642 incomplete_deliveries_remaining =
1643 smtp_purge_completed_deliveries(instr);
1647 * No delivery instructions remain, so delete both the instructions
1648 * message and the message message.
1650 if (incomplete_deliveries_remaining <= 0) {
1652 delmsgs[0] = msgnum;
1653 delmsgs[1] = text_msgid;
1654 CtdlDeleteMessages(SMTP_SPOOLOUT_ROOM, delmsgs, 2, "");
1658 * Uncompleted delivery instructions remain, so delete the old
1659 * instructions and replace with the updated ones.
1661 if (incomplete_deliveries_remaining > 0) {
1662 CtdlDeleteMessages(SMTP_SPOOLOUT_ROOM, &msgnum, 1, "");
1663 msg = malloc(sizeof(struct CtdlMessage));
1664 memset(msg, 0, sizeof(struct CtdlMessage));
1665 msg->cm_magic = CTDLMESSAGE_MAGIC;
1666 msg->cm_anon_type = MES_NORMAL;
1667 msg->cm_format_type = FMT_RFC822;
1668 msg->cm_fields['M'] = malloc(strlen(instr)+SIZ);
1669 snprintf(msg->cm_fields['M'],
1671 "Content-type: %s\n\n%s\n"
1674 SPOOLMIME, instr, (long)time(NULL), (long)retry );
1675 CtdlSubmitMsg(msg, NULL, SMTP_SPOOLOUT_ROOM, QP_EADDR);
1676 CtdlFreeMessage(msg);
1687 * Run through the queue sending out messages.
1689 void smtp_do_queue(void) {
1690 static int doing_queue = 0;
1693 * This is a simple concurrency check to make sure only one queue run
1694 * is done at a time. We could do this with a mutex, but since we
1695 * don't really require extremely fine granularity here, we'll do it
1696 * with a static variable instead.
1698 if (doing_queue) return;
1702 * Go ahead and run the queue
1704 CtdlLogPrintf(CTDL_INFO, "SMTP client: processing outbound queue\n");
1706 if (getroom(&CC->room, SMTP_SPOOLOUT_ROOM) != 0) {
1707 CtdlLogPrintf(CTDL_ERR, "Cannot find room <%s>\n", SMTP_SPOOLOUT_ROOM);
1710 CtdlForEachMessage(MSGS_ALL, 0L, NULL,
1711 SPOOLMIME, NULL, smtp_do_procmsg, NULL);
1713 CtdlLogPrintf(CTDL_INFO, "SMTP client: queue run completed\n");
1720 /*****************************************************************************/
1721 /* SMTP UTILITY COMMANDS */
1722 /*****************************************************************************/
1724 void cmd_smtp(char *argbuf) {
1731 if (CtdlAccessCheck(ac_aide)) return;
1733 extract_token(cmd, argbuf, 0, '|', sizeof cmd);
1735 if (!strcasecmp(cmd, "mx")) {
1736 extract_token(node, argbuf, 1, '|', sizeof node);
1737 num_mxhosts = getmx(buf, node);
1738 cprintf("%d %d MX hosts listed for %s\n",
1739 LISTING_FOLLOWS, num_mxhosts, node);
1740 for (i=0; i<num_mxhosts; ++i) {
1741 extract_token(node, buf, i, '|', sizeof node);
1742 cprintf("%s\n", node);
1748 else if (!strcasecmp(cmd, "runqueue")) {
1750 cprintf("%d All outbound SMTP will be retried now.\n", CIT_OK);
1755 cprintf("%d Invalid command.\n", ERROR + ILLEGAL_VALUE);
1762 * Initialize the SMTP outbound queue
1764 void smtp_init_spoolout(void) {
1765 struct ctdlroom qrbuf;
1768 * Create the room. This will silently fail if the room already
1769 * exists, and that's perfectly ok, because we want it to exist.
1771 create_room(SMTP_SPOOLOUT_ROOM, 3, "", 0, 1, 0, VIEW_MAILBOX);
1774 * Make sure it's set to be a "system room" so it doesn't show up
1775 * in the <K>nown rooms list for Aides.
1777 if (lgetroom(&qrbuf, SMTP_SPOOLOUT_ROOM) == 0) {
1778 qrbuf.QRflags2 |= QR2_SYSTEM;
1786 /*****************************************************************************/
1787 /* MODULE INITIALIZATION STUFF */
1788 /*****************************************************************************/
1790 * This cleanup function blows away the temporary memory used by
1793 void smtp_cleanup_function(void) {
1795 /* Don't do this stuff if this is not an SMTP session! */
1796 if (CC->h_command_function != smtp_command_loop) return;
1798 CtdlLogPrintf(CTDL_DEBUG, "Performing SMTP cleanup hook\n");
1804 const char *CitadelServiceSMTP_MTA="SMTP-MTA";
1805 const char *CitadelServiceSMTPS_MTA="SMTPs-MTA";
1806 const char *CitadelServiceSMTP_MSA="SMTP-MSA";
1807 const char *CitadelServiceSMTP_LMTP="LMTP";
1808 const char *CitadelServiceSMTP_LMTP_UNF="LMTP-UnF";
1810 CTDL_MODULE_INIT(smtp)
1814 CtdlRegisterServiceHook(config.c_smtp_port, /* SMTP MTA */
1819 CitadelServiceSMTP_MTA);
1822 CtdlRegisterServiceHook(config.c_smtps_port,
1827 CitadelServiceSMTPS_MTA);
1830 CtdlRegisterServiceHook(config.c_msa_port, /* SMTP MSA */
1835 CitadelServiceSMTP_MSA);
1837 CtdlRegisterServiceHook(0, /* local LMTP */
1842 CitadelServiceSMTP_LMTP);
1844 CtdlRegisterServiceHook(0, /* local LMTP */
1845 file_lmtp_unfiltered_socket,
1846 lmtp_unfiltered_greeting,
1849 CitadelServiceSMTP_LMTP_UNF);
1851 smtp_init_spoolout();
1852 CtdlRegisterSessionHook(smtp_do_queue, EVT_TIMER);
1853 CtdlRegisterSessionHook(smtp_cleanup_function, EVT_STOP);
1854 CtdlRegisterProtoHook(cmd_smtp, "SMTP", "SMTP utility commands");
1857 /* return our Subversion id for the Log */