2 * This module is an SMTP and ESMTP server for the Citadel system.
3 * It is compliant with all of the following:
5 * RFC 821 - Simple Mail Transfer Protocol
6 * RFC 876 - Survey of SMTP Implementations
7 * RFC 1047 - Duplicate messages and SMTP
8 * RFC 1652 - 8 bit MIME
9 * RFC 1869 - Extended Simple Mail Transfer Protocol
10 * RFC 1870 - SMTP Service Extension for Message Size Declaration
11 * RFC 2033 - Local Mail Transfer Protocol
12 * RFC 2197 - SMTP Service Extension for Command Pipelining
13 * RFC 2476 - Message Submission
14 * RFC 2487 - SMTP Service Extension for Secure SMTP over TLS
15 * RFC 2554 - SMTP Service Extension for Authentication
16 * RFC 2821 - Simple Mail Transfer Protocol
17 * RFC 2822 - Internet Message Format
18 * RFC 2920 - SMTP Service Extension for Command Pipelining
20 * The VRFY and EXPN commands have been removed from this implementation
21 * because nobody uses these commands anymore, except for spammers.
23 * Copyright (c) 1998-2012 by the citadel.org team
25 * This program is open source software; you can redistribute it and/or modify
26 * it under the terms of the GNU General Public License version 3.
28 * This program is distributed in the hope that it will be useful,
29 * but WITHOUT ANY WARRANTY; without even the implied warranty of
30 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
31 * GNU General Public License for more details.
43 #include <sys/types.h>
46 #if TIME_WITH_SYS_TIME
47 # include <sys/time.h>
51 # include <sys/time.h>
61 #include <sys/socket.h>
62 #include <netinet/in.h>
63 #include <arpa/inet.h>
64 #include <libcitadel.h>
67 #include "citserver.h"
74 #include "internet_addressing.h"
77 #include "clientsocket.h"
78 #include "locate_host.h"
79 #include "citadel_dirs.h"
88 #include "ctdl_module.h"
90 #include "smtp_util.h"
91 enum { /* Command states for login authentication */
100 * Here's where our SMTP session begins its happy day.
102 void smtp_greeting(int is_msa)
105 char message_to_spammer[1024];
107 strcpy(CC->cs_clientname, "SMTP session");
108 CC->internal_pgm = 1;
109 CC->cs_flags |= CS_STEALTH;
110 CC->session_specific_data = malloc(sizeof(citsmtp));
111 memset(SMTP, 0, sizeof(citsmtp));
113 sSMTP->is_msa = is_msa;
115 /* If this config option is set, reject connections from problem
116 * addresses immediately instead of after they execute a RCPT
118 if ( (config.c_rbl_at_greeting) && (sSMTP->is_msa == 0) ) {
119 if (rbl_check(message_to_spammer)) {
120 if (server_shutting_down)
121 cprintf("421 %s\r\n", message_to_spammer);
123 cprintf("550 %s\r\n", message_to_spammer);
124 CC->kill_me = KILLME_SPAMMER;
125 /* no need to free_recipients(valid), it's not allocated yet */
130 /* Otherwise we're either clean or we check later. */
132 if (CC->nologin==1) {
133 cprintf("451 Too many connections are already open; please try again later.\r\n");
134 CC->kill_me = KILLME_MAX_SESSIONS_EXCEEDED;
135 /* no need to free_recipients(valid), it's not allocated yet */
139 /* Note: the FQDN *must* appear as the first thing after the 220 code.
140 * Some clients (including citmail.c) depend on it being there.
142 cprintf("220 %s ESMTP Citadel server ready.\r\n", config.c_fqdn);
147 * SMTPS is just like SMTP, except it goes crypto right away.
149 void smtps_greeting(void) {
150 CtdlModuleStartCryptoMsgs(NULL, NULL, NULL);
152 if (!CC->redirect_ssl) CC->kill_me = KILLME_NO_CRYPTO; /* kill session if no crypto */
159 * SMTP MSA port requires authentication.
161 void smtp_msa_greeting(void) {
167 * LMTP is like SMTP but with some extra bonus footage added.
169 void lmtp_greeting(void) {
177 * Generic SMTP MTA greeting
179 void smtp_mta_greeting(void) {
185 * We also have an unfiltered LMTP socket that bypasses spam filters.
187 void lmtp_unfiltered_greeting(void) {
193 sSMTP->is_unfiltered = 1;
198 * Login greeting common to all auth methods
200 void smtp_auth_greeting(void) {
201 cprintf("235 Hello, %s\r\n", CC->user.fullname);
202 syslog(LOG_NOTICE, "SMTP authenticated %s\n", CC->user.fullname);
203 CC->internal_pgm = 0;
204 CC->cs_flags &= ~CS_STEALTH;
209 * Implement HELO and EHLO commands.
211 * which_command: 0=HELO, 1=EHLO, 2=LHLO
213 void smtp_hello(char *argbuf, int which_command) {
214 citsmtp *sSMTP = SMTP;
216 safestrncpy(sSMTP->helo_node, argbuf, sizeof sSMTP->helo_node);
218 if ( (which_command != 2) && (sSMTP->is_lmtp) ) {
219 cprintf("500 Only LHLO is allowed when running LMTP\r\n");
223 if ( (which_command == 2) && (sSMTP->is_lmtp == 0) ) {
224 cprintf("500 LHLO is only allowed when running LMTP\r\n");
228 if (which_command == 0) {
229 cprintf("250 Hello %s (%s [%s])\r\n",
236 if (which_command == 1) {
237 cprintf("250-Hello %s (%s [%s])\r\n",
244 cprintf("250-Greetings and joyous salutations.\r\n");
246 cprintf("250-HELP\r\n");
247 cprintf("250-SIZE %ld\r\n", config.c_maxmsglen);
251 * Offer TLS, but only if TLS is not already active.
252 * Furthermore, only offer TLS when running on
253 * the SMTP-MSA port, not on the SMTP-MTA port, due to
254 * questionable reliability of TLS in certain sending MTA's.
256 if ( (!CC->redirect_ssl) && (sSMTP->is_msa) ) {
257 cprintf("250-STARTTLS\r\n");
259 #endif /* HAVE_OPENSSL */
261 cprintf("250-AUTH LOGIN PLAIN\r\n"
262 "250-AUTH=LOGIN PLAIN\r\n"
271 * Implement HELP command.
273 void smtp_help(void) {
274 cprintf("214 RTFM http://www.ietf.org/rfc/rfc2821.txt\r\n");
281 void smtp_get_user(char *argbuf) {
284 citsmtp *sSMTP = SMTP;
286 CtdlDecodeBase64(username, argbuf, SIZ);
287 /* syslog(LOG_DEBUG, "Trying <%s>\n", username); */
288 if (CtdlLoginExistingUser(NULL, username) == login_ok) {
289 CtdlEncodeBase64(buf, "Password:", 9, 0);
290 cprintf("334 %s\r\n", buf);
291 sSMTP->command_state = smtp_password;
294 cprintf("500 No such user.\r\n");
295 sSMTP->command_state = smtp_command;
303 void smtp_get_pass(char *argbuf) {
307 memset(password, 0, sizeof(password));
308 len = CtdlDecodeBase64(password, argbuf, SIZ);
309 /* syslog(LOG_DEBUG, "Trying <%s>\n", password); */
310 if (CtdlTryPassword(password, len) == pass_ok) {
311 smtp_auth_greeting();
314 cprintf("535 Authentication failed.\r\n");
316 SMTP->command_state = smtp_command;
321 * Back end for PLAIN auth method (either inline or multistate)
323 void smtp_try_plain(char *encoded_authstring) {
324 char decoded_authstring[1024];
331 CtdlDecodeBase64(decoded_authstring, encoded_authstring, strlen(encoded_authstring) );
332 safestrncpy(ident, decoded_authstring, sizeof ident);
333 safestrncpy(user, &decoded_authstring[strlen(ident) + 1], sizeof user);
334 len = safestrncpy(pass, &decoded_authstring[strlen(ident) + strlen(user) + 2], sizeof pass);
336 len = sizeof(pass) - 1;
338 SMTP->command_state = smtp_command;
340 if (!IsEmptyStr(ident)) {
341 result = CtdlLoginExistingUser(user, ident);
344 result = CtdlLoginExistingUser(NULL, user);
347 if (result == login_ok) {
348 if (CtdlTryPassword(pass, len) == pass_ok) {
349 smtp_auth_greeting();
353 cprintf("504 Authentication failed.\r\n");
358 * Attempt to perform authenticated SMTP
360 void smtp_auth(char *argbuf) {
361 char username_prompt[64];
363 char encoded_authstring[1024];
366 cprintf("504 Already logged in.\r\n");
370 extract_token(method, argbuf, 0, ' ', sizeof method);
372 if (!strncasecmp(method, "login", 5) ) {
373 if (strlen(argbuf) >= 7) {
374 smtp_get_user(&argbuf[6]);
377 CtdlEncodeBase64(username_prompt, "Username:", 9, 0);
378 cprintf("334 %s\r\n", username_prompt);
379 SMTP->command_state = smtp_user;
384 if (!strncasecmp(method, "plain", 5) ) {
385 if (num_tokens(argbuf, ' ') < 2) {
387 SMTP->command_state = smtp_plain;
391 extract_token(encoded_authstring, argbuf, 1, ' ', sizeof encoded_authstring);
393 smtp_try_plain(encoded_authstring);
397 if (strncasecmp(method, "login", 5) ) {
398 cprintf("504 Unknown authentication method.\r\n");
406 * Implements the RSET (reset state) command.
407 * Currently this just zeroes out the state buffer. If pointers to data
408 * allocated with malloc() are ever placed in the state buffer, we have to
409 * be sure to free() them first!
411 * Set do_response to nonzero to output the SMTP RSET response code.
413 void smtp_rset(int do_response) {
416 citsmtp *sSMTP = SMTP;
419 * Our entire SMTP state is discarded when a RSET command is issued,
420 * but we need to preserve this one little piece of information, so
421 * we save it for later.
423 is_lmtp = sSMTP->is_lmtp;
424 is_unfiltered = sSMTP->is_unfiltered;
426 memset(sSMTP, 0, sizeof(citsmtp));
429 * It is somewhat ambiguous whether we want to log out when a RSET
430 * command is issued. Here's the code to do it. It is commented out
431 * because some clients (such as Pine) issue RSET commands before
432 * each message, but still expect to be logged in.
434 * if (CC->logged_in) {
440 * Reinstate this little piece of information we saved (see above).
442 sSMTP->is_lmtp = is_lmtp;
443 sSMTP->is_unfiltered = is_unfiltered;
446 cprintf("250 Zap!\r\n");
451 * Clear out the portions of the state buffer that need to be cleared out
452 * after the DATA command finishes.
454 void smtp_data_clear(void) {
455 citsmtp *sSMTP = SMTP;
457 strcpy(sSMTP->from, "");
458 strcpy(sSMTP->recipients, "");
459 sSMTP->number_of_recipients = 0;
460 sSMTP->delivery_mode = 0;
461 sSMTP->message_originated_locally = 0;
465 * Implements the "MAIL FROM:" command
467 void smtp_mail(char *argbuf) {
471 citsmtp *sSMTP = SMTP;
473 if (!IsEmptyStr(sSMTP->from)) {
474 cprintf("503 Only one sender permitted\r\n");
478 if (strncasecmp(argbuf, "From:", 5)) {
479 cprintf("501 Syntax error\r\n");
483 strcpy(sSMTP->from, &argbuf[5]);
484 striplt(sSMTP->from);
485 if (haschar(sSMTP->from, '<') > 0) {
486 stripallbut(sSMTP->from, '<', '>');
489 /* We used to reject empty sender names, until it was brought to our
490 * attention that RFC1123 5.2.9 requires that this be allowed. So now
491 * we allow it, but replace the empty string with a fake
492 * address so we don't have to contend with the empty string causing
493 * other code to fail when it's expecting something there.
495 if (IsEmptyStr(sSMTP->from)) {
496 strcpy(sSMTP->from, "someone@example.com");
499 /* If this SMTP connection is from a logged-in user, force the 'from'
500 * to be the user's Internet e-mail address as Citadel knows it.
503 safestrncpy(sSMTP->from, CC->cs_inet_email, sizeof sSMTP->from);
504 cprintf("250 Sender ok <%s>\r\n", sSMTP->from);
505 sSMTP->message_originated_locally = 1;
509 else if (sSMTP->is_lmtp) {
510 /* Bypass forgery checking for LMTP */
513 /* Otherwise, make sure outsiders aren't trying to forge mail from
514 * this system (unless, of course, c_allow_spoofing is enabled)
516 else if (config.c_allow_spoofing == 0) {
517 process_rfc822_addr(sSMTP->from, user, node, name);
518 if (CtdlHostAlias(node) != hostalias_nomatch) {
519 cprintf("550 You must log in to send mail from %s\r\n", node);
520 strcpy(sSMTP->from, "");
525 cprintf("250 Sender ok\r\n");
531 * Implements the "RCPT To:" command
533 void smtp_rcpt(char *argbuf) {
535 char message_to_spammer[SIZ];
536 struct recptypes *valid = NULL;
537 citsmtp *sSMTP = SMTP;
539 if (IsEmptyStr(sSMTP->from)) {
540 cprintf("503 Need MAIL before RCPT\r\n");
544 if (strncasecmp(argbuf, "To:", 3)) {
545 cprintf("501 Syntax error\r\n");
549 if ( (sSMTP->is_msa) && (!CC->logged_in) ) {
550 cprintf("550 You must log in to send mail on this port.\r\n");
551 strcpy(sSMTP->from, "");
555 safestrncpy(recp, &argbuf[3], sizeof recp);
557 stripallbut(recp, '<', '>');
559 if ( (strlen(recp) + strlen(sSMTP->recipients) + 1 ) >= SIZ) {
560 cprintf("452 Too many recipients\r\n");
565 if ( (!CC->logged_in) /* Don't RBL authenticated users */
566 && (!sSMTP->is_lmtp) ) { /* Don't RBL LMTP clients */
567 if (config.c_rbl_at_greeting == 0) { /* Don't RBL again if we already did it */
568 if (rbl_check(message_to_spammer)) {
569 if (server_shutting_down)
570 cprintf("421 %s\r\n", message_to_spammer);
572 cprintf("550 %s\r\n", message_to_spammer);
573 /* no need to free_recipients(valid), it's not allocated yet */
579 valid = validate_recipients(
581 smtp_get_Recipients(),
582 (sSMTP->is_lmtp)? POST_LMTP: (CC->logged_in)? POST_LOGGED_IN: POST_EXTERNAL
584 if (valid->num_error != 0) {
585 cprintf("550 %s\r\n", valid->errormsg);
586 free_recipients(valid);
590 if (valid->num_internet > 0) {
592 if (CtdlCheckInternetMailPermission(&CC->user)==0) {
593 cprintf("551 <%s> - you do not have permission to send Internet mail\r\n", recp);
594 free_recipients(valid);
600 if (valid->num_internet > 0) {
601 if ( (sSMTP->message_originated_locally == 0)
602 && (sSMTP->is_lmtp == 0) ) {
603 cprintf("551 <%s> - relaying denied\r\n", recp);
604 free_recipients(valid);
609 cprintf("250 RCPT ok <%s>\r\n", recp);
610 if (!IsEmptyStr(sSMTP->recipients)) {
611 strcat(sSMTP->recipients, ",");
613 strcat(sSMTP->recipients, recp);
614 sSMTP->number_of_recipients += 1;
616 free_recipients(valid);
624 * Implements the DATA command
626 void smtp_data(void) {
628 char *defbody; //TODO: remove me
629 struct CtdlMessage *msg = NULL;
632 struct recptypes *valid;
636 citsmtp *sSMTP = SMTP;
638 if (IsEmptyStr(sSMTP->from)) {
639 cprintf("503 Need MAIL command first.\r\n");
643 if (sSMTP->number_of_recipients < 1) {
644 cprintf("503 Need RCPT command first.\r\n");
648 cprintf("354 Transmit message now - terminate with '.' by itself\r\n");
650 datestring(nowstamp, sizeof nowstamp, time(NULL), DATESTRING_RFC822);
651 defbody = malloc(4096);
653 if (defbody != NULL) {
654 if (sSMTP->is_lmtp && (CC->cs_UDSclientUID != -1)) {
655 snprintf(defbody, 4096,
656 "Received: from %s (Citadel from userid %ld)\n"
659 (long int) CC->cs_UDSclientUID,
664 snprintf(defbody, 4096,
665 "Received: from %s (%s [%s])\n"
674 body = CtdlReadMessageBodyBuf(HKEY("."), config.c_maxmsglen, defbody, 1, NULL);
676 cprintf("550 Unable to save message: internal error.\r\n");
680 syslog(LOG_DEBUG, "Converting message...\n");
681 msg = convert_internet_message_buf(&body);
683 /* If the user is locally authenticated, FORCE the From: header to
684 * show up as the real sender. Yes, this violates the RFC standard,
685 * but IT MAKES SENSE. If you prefer strict RFC adherence over
686 * common sense, you can disable this in the configuration.
688 * We also set the "message room name" ('O' field) to MAILROOM
689 * (which is Mail> on most systems) to prevent it from getting set
690 * to something ugly like "0000058008.Sent Items>" when the message
691 * is read with a Citadel client.
693 if ( (CC->logged_in) && (config.c_rfc822_strict_from != CFG_SMTP_FROM_NOFILTER) ) {
696 if (!IsEmptyStr(msg->cm_fields['F']) &&
697 ((config.c_rfc822_strict_from == CFG_SMTP_FROM_CORRECT) ||
698 (config.c_rfc822_strict_from == CFG_SMTP_FROM_REJECT) ) )
700 if (!IsEmptyStr(CC->cs_inet_email))
701 validemail = strcmp(CC->cs_inet_email, msg->cm_fields['F']) == 0;
703 (!IsEmptyStr(CC->cs_inet_other_emails)))
705 int num_secondary_emails = 0;
707 num_secondary_emails = num_tokens(CC->cs_inet_other_emails, '|');
708 for (i=0; i < num_secondary_emails && !validemail; ++i) {
710 extract_token(buf, CC->cs_inet_other_emails,i,'|',sizeof CC->cs_inet_other_emails);
711 validemail = strcmp(buf, msg->cm_fields['F']) == 0;
716 if (!validemail && (config.c_rfc822_strict_from == CFG_SMTP_FROM_REJECT)) {
717 syslog(LOG_ERR, "invalid sender '%s' - rejecting this message", msg->cm_fields['F']);
718 cprintf("550 Invalid sender '%s' - rejecting this message.\r\n", msg->cm_fields['F']);
722 if (msg->cm_fields['A'] != NULL) free(msg->cm_fields['A']);
723 if (msg->cm_fields['N'] != NULL) free(msg->cm_fields['N']);
724 if (msg->cm_fields['H'] != NULL) free(msg->cm_fields['H']);
725 if (msg->cm_fields['O'] != NULL) free(msg->cm_fields['O']);
726 msg->cm_fields['A'] = strdup(CC->user.fullname);
727 msg->cm_fields['N'] = strdup(config.c_nodename);
728 msg->cm_fields['H'] = strdup(config.c_humannode);
729 msg->cm_fields['O'] = strdup(MAILROOM);
732 if (msg->cm_fields['F'] != NULL) free(msg->cm_fields['F']);
733 msg->cm_fields['F'] = strdup(CC->cs_inet_email);
737 /* Set the "envelope from" address */
738 if (msg->cm_fields['P'] != NULL) {
739 free(msg->cm_fields['P']);
741 msg->cm_fields['P'] = strdup(sSMTP->from);
743 /* Set the "envelope to" address */
744 if (msg->cm_fields['V'] != NULL) {
745 free(msg->cm_fields['V']);
747 msg->cm_fields['V'] = strdup(sSMTP->recipients);
749 /* Submit the message into the Citadel system. */
750 valid = validate_recipients(
752 smtp_get_Recipients(),
753 (sSMTP->is_lmtp)? POST_LMTP: (CC->logged_in)? POST_LOGGED_IN: POST_EXTERNAL
756 /* If there are modules that want to scan this message before final
757 * submission (such as virus checkers or spam filters), call them now
758 * and give them an opportunity to reject the message.
760 if (sSMTP->is_unfiltered) {
764 scan_errors = PerformMessageHooks(msg, EVT_SMTPSCAN);
767 if (scan_errors > 0) { /* We don't want this message! */
769 if (msg->cm_fields['0'] == NULL) {
770 msg->cm_fields['0'] = strdup("Message rejected by filter");
773 sprintf(result, "550 %s\r\n", msg->cm_fields['0']);
776 else { /* Ok, we'll accept this message. */
777 msgnum = CtdlSubmitMsg(msg, valid, "", 0);
779 sprintf(result, "250 Message accepted.\r\n");
782 sprintf(result, "550 Internal delivery error\r\n");
786 /* For SMTP and ESMTP, just print the result message. For LMTP, we
787 * have to print one result message for each recipient. Since there
788 * is nothing in Citadel which would cause different recipients to
789 * have different results, we can get away with just spitting out the
790 * same message once for each recipient.
792 if (sSMTP->is_lmtp) {
793 for (i=0; i<sSMTP->number_of_recipients; ++i) {
794 cprintf("%s", result);
798 cprintf("%s", result);
801 /* Write something to the syslog(which may or may not be where the
802 * rest of the Citadel logs are going; some sysadmins want LOG_MAIL).
804 syslog((LOG_MAIL | LOG_INFO),
805 "%ld: from=<%s>, nrcpts=%d, relay=%s [%s], stat=%s",
808 sSMTP->number_of_recipients,
815 CtdlFreeMessage(msg);
816 free_recipients(valid);
817 smtp_data_clear(); /* clear out the buffers now */
822 * implements the STARTTLS command
824 void smtp_starttls(void)
826 char ok_response[SIZ];
827 char nosup_response[SIZ];
828 char error_response[SIZ];
830 sprintf(ok_response, "220 Begin TLS negotiation now\r\n");
831 sprintf(nosup_response, "554 TLS not supported here\r\n");
832 sprintf(error_response, "554 Internal error\r\n");
833 CtdlModuleStartCryptoMsgs(ok_response, nosup_response, error_response);
839 * Main command loop for SMTP server sessions.
841 void smtp_command_loop(void) {
843 citsmtp *sSMTP = SMTP;
846 syslog(LOG_EMERG, "Session SMTP data is null. WTF? We will crash now.\n");
847 return cit_panic_backtrace (0);
851 memset(cmdbuf, 0, sizeof cmdbuf); /* Clear it, just in case */
852 if (client_getln(cmdbuf, sizeof cmdbuf) < 1) {
853 syslog(LOG_CRIT, "SMTP: client disconnected: ending session.\n");
854 CC->kill_me = KILLME_CLIENT_DISCONNECTED;
857 syslog(LOG_INFO, "SMTP server: %s\n", cmdbuf);
858 while (strlen(cmdbuf) < 5) strcat(cmdbuf, " ");
860 if (sSMTP->command_state == smtp_user) {
861 smtp_get_user(cmdbuf);
864 else if (sSMTP->command_state == smtp_password) {
865 smtp_get_pass(cmdbuf);
868 else if (sSMTP->command_state == smtp_plain) {
869 smtp_try_plain(cmdbuf);
872 else if (!strncasecmp(cmdbuf, "AUTH", 4)) {
873 smtp_auth(&cmdbuf[5]);
876 else if (!strncasecmp(cmdbuf, "DATA", 4)) {
880 else if (!strncasecmp(cmdbuf, "HELO", 4)) {
881 smtp_hello(&cmdbuf[5], 0);
884 else if (!strncasecmp(cmdbuf, "EHLO", 4)) {
885 smtp_hello(&cmdbuf[5], 1);
888 else if (!strncasecmp(cmdbuf, "LHLO", 4)) {
889 smtp_hello(&cmdbuf[5], 2);
892 else if (!strncasecmp(cmdbuf, "HELP", 4)) {
896 else if (!strncasecmp(cmdbuf, "MAIL", 4)) {
897 smtp_mail(&cmdbuf[5]);
900 else if (!strncasecmp(cmdbuf, "NOOP", 4)) {
901 cprintf("250 NOOP\r\n");
904 else if (!strncasecmp(cmdbuf, "QUIT", 4)) {
905 cprintf("221 Goodbye...\r\n");
906 CC->kill_me = KILLME_CLIENT_LOGGED_OUT;
910 else if (!strncasecmp(cmdbuf, "RCPT", 4)) {
911 smtp_rcpt(&cmdbuf[5]);
914 else if (!strncasecmp(cmdbuf, "RSET", 4)) {
918 else if (!strcasecmp(cmdbuf, "STARTTLS")) {
923 cprintf("502 I'm afraid I can't do that.\r\n");
930 /*****************************************************************************/
931 /* MODULE INITIALIZATION STUFF */
932 /*****************************************************************************/
934 * This cleanup function blows away the temporary memory used by
937 void smtp_cleanup_function(void) {
939 /* Don't do this stuff if this is not an SMTP session! */
940 if (CC->h_command_function != smtp_command_loop) return;
942 syslog(LOG_DEBUG, "Performing SMTP cleanup hook\n");
948 const char *CitadelServiceSMTP_MTA="SMTP-MTA";
949 const char *CitadelServiceSMTPS_MTA="SMTPs-MTA";
950 const char *CitadelServiceSMTP_MSA="SMTP-MSA";
951 const char *CitadelServiceSMTP_LMTP="LMTP";
952 const char *CitadelServiceSMTP_LMTP_UNF="LMTP-UnF";
954 CTDL_MODULE_INIT(smtp)
958 CtdlRegisterServiceHook(config.c_smtp_port, /* SMTP MTA */
963 CitadelServiceSMTP_MTA);
966 CtdlRegisterServiceHook(config.c_smtps_port,
971 CitadelServiceSMTPS_MTA);
974 CtdlRegisterServiceHook(config.c_msa_port, /* SMTP MSA */
979 CitadelServiceSMTP_MSA);
981 CtdlRegisterServiceHook(0, /* local LMTP */
986 CitadelServiceSMTP_LMTP);
988 CtdlRegisterServiceHook(0, /* local LMTP */
989 file_lmtp_unfiltered_socket,
990 lmtp_unfiltered_greeting,
993 CitadelServiceSMTP_LMTP_UNF);
995 CtdlRegisterSessionHook(smtp_cleanup_function, EVT_STOP, PRIO_STOP + 250);
998 /* return our module name for the log */