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"
80 #include "ctdl_module.h"
82 #include "smtp_util.h"
83 enum { /* Command states for login authentication */
92 * Here's where our SMTP session begins its happy day.
94 void smtp_greeting(int is_msa)
97 char message_to_spammer[1024];
99 strcpy(CC->cs_clientname, "SMTP session");
100 CC->internal_pgm = 1;
101 CC->cs_flags |= CS_STEALTH;
102 CC->session_specific_data = malloc(sizeof(citsmtp));
103 memset(SMTP, 0, sizeof(citsmtp));
105 sSMTP->is_msa = is_msa;
107 /* If this config option is set, reject connections from problem
108 * addresses immediately instead of after they execute a RCPT
110 if ( (config.c_rbl_at_greeting) && (sSMTP->is_msa == 0) ) {
111 if (rbl_check(message_to_spammer)) {
112 if (server_shutting_down)
113 cprintf("421 %s\r\n", message_to_spammer);
115 cprintf("550 %s\r\n", message_to_spammer);
116 CC->kill_me = KILLME_SPAMMER;
117 /* no need to free_recipients(valid), it's not allocated yet */
122 /* Otherwise we're either clean or we check later. */
124 if (CC->nologin==1) {
125 cprintf("451 Too many connections are already open; please try again later.\r\n");
126 CC->kill_me = KILLME_MAX_SESSIONS_EXCEEDED;
127 /* no need to free_recipients(valid), it's not allocated yet */
131 /* Note: the FQDN *must* appear as the first thing after the 220 code.
132 * Some clients (including citmail.c) depend on it being there.
134 cprintf("220 %s ESMTP Citadel server ready.\r\n", config.c_fqdn);
139 * SMTPS is just like SMTP, except it goes crypto right away.
141 void smtps_greeting(void) {
142 CtdlModuleStartCryptoMsgs(NULL, NULL, NULL);
144 if (!CC->redirect_ssl) CC->kill_me = KILLME_NO_CRYPTO; /* kill session if no crypto */
151 * SMTP MSA port requires authentication.
153 void smtp_msa_greeting(void) {
159 * LMTP is like SMTP but with some extra bonus footage added.
161 void lmtp_greeting(void) {
169 * Generic SMTP MTA greeting
171 void smtp_mta_greeting(void) {
177 * We also have an unfiltered LMTP socket that bypasses spam filters.
179 void lmtp_unfiltered_greeting(void) {
185 sSMTP->is_unfiltered = 1;
190 * Login greeting common to all auth methods
192 void smtp_auth_greeting(void) {
193 cprintf("235 Hello, %s\r\n", CC->user.fullname);
194 syslog(LOG_NOTICE, "SMTP authenticated %s\n", CC->user.fullname);
195 CC->internal_pgm = 0;
196 CC->cs_flags &= ~CS_STEALTH;
201 * Implement HELO and EHLO commands.
203 * which_command: 0=HELO, 1=EHLO, 2=LHLO
205 void smtp_hello(char *argbuf, int which_command) {
206 citsmtp *sSMTP = SMTP;
208 safestrncpy(sSMTP->helo_node, argbuf, sizeof sSMTP->helo_node);
210 if ( (which_command != 2) && (sSMTP->is_lmtp) ) {
211 cprintf("500 Only LHLO is allowed when running LMTP\r\n");
215 if ( (which_command == 2) && (sSMTP->is_lmtp == 0) ) {
216 cprintf("500 LHLO is only allowed when running LMTP\r\n");
220 if (which_command == 0) {
221 cprintf("250 Hello %s (%s [%s])\r\n",
228 if (which_command == 1) {
229 cprintf("250-Hello %s (%s [%s])\r\n",
236 cprintf("250-Greetings and joyous salutations.\r\n");
238 cprintf("250-HELP\r\n");
239 cprintf("250-SIZE %ld\r\n", config.c_maxmsglen);
243 * Offer TLS, but only if TLS is not already active.
244 * Furthermore, only offer TLS when running on
245 * the SMTP-MSA port, not on the SMTP-MTA port, due to
246 * questionable reliability of TLS in certain sending MTA's.
248 if ( (!CC->redirect_ssl) && (sSMTP->is_msa) ) {
249 cprintf("250-STARTTLS\r\n");
251 #endif /* HAVE_OPENSSL */
253 cprintf("250-AUTH LOGIN PLAIN\r\n"
254 "250-AUTH=LOGIN PLAIN\r\n"
263 * Implement HELP command.
265 void smtp_help(void) {
266 cprintf("214 RTFM http://www.ietf.org/rfc/rfc2821.txt\r\n");
273 void smtp_get_user(char *argbuf) {
276 citsmtp *sSMTP = SMTP;
278 CtdlDecodeBase64(username, argbuf, SIZ);
279 /* syslog(LOG_DEBUG, "Trying <%s>\n", username); */
280 if (CtdlLoginExistingUser(NULL, username) == login_ok) {
281 CtdlEncodeBase64(buf, "Password:", 9, 0);
282 cprintf("334 %s\r\n", buf);
283 sSMTP->command_state = smtp_password;
286 cprintf("500 No such user.\r\n");
287 sSMTP->command_state = smtp_command;
295 void smtp_get_pass(char *argbuf) {
299 memset(password, 0, sizeof(password));
300 len = CtdlDecodeBase64(password, argbuf, SIZ);
301 /* syslog(LOG_DEBUG, "Trying <%s>\n", password); */
302 if (CtdlTryPassword(password, len) == pass_ok) {
303 smtp_auth_greeting();
306 cprintf("535 Authentication failed.\r\n");
308 SMTP->command_state = smtp_command;
313 * Back end for PLAIN auth method (either inline or multistate)
315 void smtp_try_plain(char *encoded_authstring) {
316 char decoded_authstring[1024];
323 CtdlDecodeBase64(decoded_authstring, encoded_authstring, strlen(encoded_authstring) );
324 safestrncpy(ident, decoded_authstring, sizeof ident);
325 safestrncpy(user, &decoded_authstring[strlen(ident) + 1], sizeof user);
326 len = safestrncpy(pass, &decoded_authstring[strlen(ident) + strlen(user) + 2], sizeof pass);
328 len = sizeof(pass) - 1;
330 SMTP->command_state = smtp_command;
332 if (!IsEmptyStr(ident)) {
333 result = CtdlLoginExistingUser(user, ident);
336 result = CtdlLoginExistingUser(NULL, user);
339 if (result == login_ok) {
340 if (CtdlTryPassword(pass, len) == pass_ok) {
341 smtp_auth_greeting();
345 cprintf("504 Authentication failed.\r\n");
350 * Attempt to perform authenticated SMTP
352 void smtp_auth(char *argbuf) {
353 char username_prompt[64];
355 char encoded_authstring[1024];
358 cprintf("504 Already logged in.\r\n");
362 extract_token(method, argbuf, 0, ' ', sizeof method);
364 if (!strncasecmp(method, "login", 5) ) {
365 if (strlen(argbuf) >= 7) {
366 smtp_get_user(&argbuf[6]);
369 CtdlEncodeBase64(username_prompt, "Username:", 9, 0);
370 cprintf("334 %s\r\n", username_prompt);
371 SMTP->command_state = smtp_user;
376 if (!strncasecmp(method, "plain", 5) ) {
377 if (num_tokens(argbuf, ' ') < 2) {
379 SMTP->command_state = smtp_plain;
383 extract_token(encoded_authstring, argbuf, 1, ' ', sizeof encoded_authstring);
385 smtp_try_plain(encoded_authstring);
389 if (strncasecmp(method, "login", 5) ) {
390 cprintf("504 Unknown authentication method.\r\n");
398 * Implements the RSET (reset state) command.
399 * Currently this just zeroes out the state buffer. If pointers to data
400 * allocated with malloc() are ever placed in the state buffer, we have to
401 * be sure to free() them first!
403 * Set do_response to nonzero to output the SMTP RSET response code.
405 void smtp_rset(int do_response) {
408 citsmtp *sSMTP = SMTP;
411 * Our entire SMTP state is discarded when a RSET command is issued,
412 * but we need to preserve this one little piece of information, so
413 * we save it for later.
415 is_lmtp = sSMTP->is_lmtp;
416 is_unfiltered = sSMTP->is_unfiltered;
418 memset(sSMTP, 0, sizeof(citsmtp));
421 * It is somewhat ambiguous whether we want to log out when a RSET
422 * command is issued. Here's the code to do it. It is commented out
423 * because some clients (such as Pine) issue RSET commands before
424 * each message, but still expect to be logged in.
426 * if (CC->logged_in) {
432 * Reinstate this little piece of information we saved (see above).
434 sSMTP->is_lmtp = is_lmtp;
435 sSMTP->is_unfiltered = is_unfiltered;
438 cprintf("250 Zap!\r\n");
443 * Clear out the portions of the state buffer that need to be cleared out
444 * after the DATA command finishes.
446 void smtp_data_clear(void) {
447 citsmtp *sSMTP = SMTP;
449 strcpy(sSMTP->from, "");
450 strcpy(sSMTP->recipients, "");
451 sSMTP->number_of_recipients = 0;
452 sSMTP->delivery_mode = 0;
453 sSMTP->message_originated_locally = 0;
457 * Implements the "MAIL FROM:" command
459 void smtp_mail(char *argbuf) {
463 citsmtp *sSMTP = SMTP;
465 if (!IsEmptyStr(sSMTP->from)) {
466 cprintf("503 Only one sender permitted\r\n");
470 if (strncasecmp(argbuf, "From:", 5)) {
471 cprintf("501 Syntax error\r\n");
475 strcpy(sSMTP->from, &argbuf[5]);
476 striplt(sSMTP->from);
477 if (haschar(sSMTP->from, '<') > 0) {
478 stripallbut(sSMTP->from, '<', '>');
481 /* We used to reject empty sender names, until it was brought to our
482 * attention that RFC1123 5.2.9 requires that this be allowed. So now
483 * we allow it, but replace the empty string with a fake
484 * address so we don't have to contend with the empty string causing
485 * other code to fail when it's expecting something there.
487 if (IsEmptyStr(sSMTP->from)) {
488 strcpy(sSMTP->from, "someone@example.com");
491 /* If this SMTP connection is from a logged-in user, force the 'from'
492 * to be the user's Internet e-mail address as Citadel knows it.
495 safestrncpy(sSMTP->from, CC->cs_inet_email, sizeof sSMTP->from);
496 cprintf("250 Sender ok <%s>\r\n", sSMTP->from);
497 sSMTP->message_originated_locally = 1;
501 else if (sSMTP->is_lmtp) {
502 /* Bypass forgery checking for LMTP */
505 /* Otherwise, make sure outsiders aren't trying to forge mail from
506 * this system (unless, of course, c_allow_spoofing is enabled)
508 else if (config.c_allow_spoofing == 0) {
509 process_rfc822_addr(sSMTP->from, user, node, name);
510 if (CtdlHostAlias(node) != hostalias_nomatch) {
511 cprintf("550 You must log in to send mail from %s\r\n", node);
512 strcpy(sSMTP->from, "");
517 cprintf("250 Sender ok\r\n");
523 * Implements the "RCPT To:" command
525 void smtp_rcpt(char *argbuf) {
527 char message_to_spammer[SIZ];
528 struct recptypes *valid = NULL;
529 citsmtp *sSMTP = SMTP;
531 if (IsEmptyStr(sSMTP->from)) {
532 cprintf("503 Need MAIL before RCPT\r\n");
536 if (strncasecmp(argbuf, "To:", 3)) {
537 cprintf("501 Syntax error\r\n");
541 if ( (sSMTP->is_msa) && (!CC->logged_in) ) {
542 cprintf("550 You must log in to send mail on this port.\r\n");
543 strcpy(sSMTP->from, "");
547 safestrncpy(recp, &argbuf[3], sizeof recp);
549 stripallbut(recp, '<', '>');
551 if ( (strlen(recp) + strlen(sSMTP->recipients) + 1 ) >= SIZ) {
552 cprintf("452 Too many recipients\r\n");
557 if ( (!CC->logged_in) /* Don't RBL authenticated users */
558 && (!sSMTP->is_lmtp) ) { /* Don't RBL LMTP clients */
559 if (config.c_rbl_at_greeting == 0) { /* Don't RBL again if we already did it */
560 if (rbl_check(message_to_spammer)) {
561 if (server_shutting_down)
562 cprintf("421 %s\r\n", message_to_spammer);
564 cprintf("550 %s\r\n", message_to_spammer);
565 /* no need to free_recipients(valid), it's not allocated yet */
571 valid = validate_recipients(
573 smtp_get_Recipients(),
574 (sSMTP->is_lmtp)? POST_LMTP: (CC->logged_in)? POST_LOGGED_IN: POST_EXTERNAL
576 if (valid->num_error != 0) {
577 cprintf("550 %s\r\n", valid->errormsg);
578 free_recipients(valid);
582 if (valid->num_internet > 0) {
584 if (CtdlCheckInternetMailPermission(&CC->user)==0) {
585 cprintf("551 <%s> - you do not have permission to send Internet mail\r\n", recp);
586 free_recipients(valid);
592 if (valid->num_internet > 0) {
593 if ( (sSMTP->message_originated_locally == 0)
594 && (sSMTP->is_lmtp == 0) ) {
595 cprintf("551 <%s> - relaying denied\r\n", recp);
596 free_recipients(valid);
601 cprintf("250 RCPT ok <%s>\r\n", recp);
602 if (!IsEmptyStr(sSMTP->recipients)) {
603 strcat(sSMTP->recipients, ",");
605 strcat(sSMTP->recipients, recp);
606 sSMTP->number_of_recipients += 1;
608 free_recipients(valid);
616 * Implements the DATA command
618 void smtp_data(void) {
620 char *defbody; //TODO: remove me
621 struct CtdlMessage *msg = NULL;
624 struct recptypes *valid;
628 citsmtp *sSMTP = SMTP;
630 if (IsEmptyStr(sSMTP->from)) {
631 cprintf("503 Need MAIL command first.\r\n");
635 if (sSMTP->number_of_recipients < 1) {
636 cprintf("503 Need RCPT command first.\r\n");
640 cprintf("354 Transmit message now - terminate with '.' by itself\r\n");
642 datestring(nowstamp, sizeof nowstamp, time(NULL), DATESTRING_RFC822);
643 defbody = malloc(4096);
645 if (defbody != NULL) {
646 if (sSMTP->is_lmtp && (CC->cs_UDSclientUID != -1)) {
647 snprintf(defbody, 4096,
648 "Received: from %s (Citadel from userid %ld)\n"
651 (long int) CC->cs_UDSclientUID,
656 snprintf(defbody, 4096,
657 "Received: from %s (%s [%s])\n"
666 body = CtdlReadMessageBodyBuf(HKEY("."), config.c_maxmsglen, defbody, 1, NULL);
668 cprintf("550 Unable to save message: internal error.\r\n");
672 syslog(LOG_DEBUG, "Converting message...\n");
673 msg = convert_internet_message_buf(&body);
675 /* If the user is locally authenticated, FORCE the From: header to
676 * show up as the real sender. Yes, this violates the RFC standard,
677 * but IT MAKES SENSE. If you prefer strict RFC adherence over
678 * common sense, you can disable this in the configuration.
680 * We also set the "message room name" ('O' field) to MAILROOM
681 * (which is Mail> on most systems) to prevent it from getting set
682 * to something ugly like "0000058008.Sent Items>" when the message
683 * is read with a Citadel client.
685 if ( (CC->logged_in) && (config.c_rfc822_strict_from != CFG_SMTP_FROM_NOFILTER) ) {
688 if (!IsEmptyStr(msg->cm_fields['F']) &&
689 ((config.c_rfc822_strict_from == CFG_SMTP_FROM_CORRECT) ||
690 (config.c_rfc822_strict_from == CFG_SMTP_FROM_REJECT) ) )
692 if (!IsEmptyStr(CC->cs_inet_email))
693 validemail = strcmp(CC->cs_inet_email, msg->cm_fields['F']) == 0;
695 (!IsEmptyStr(CC->cs_inet_other_emails)))
697 int num_secondary_emails = 0;
699 num_secondary_emails = num_tokens(CC->cs_inet_other_emails, '|');
700 for (i=0; i < num_secondary_emails && !validemail; ++i) {
702 extract_token(buf, CC->cs_inet_other_emails,i,'|',sizeof CC->cs_inet_other_emails);
703 validemail = strcmp(buf, msg->cm_fields['F']) == 0;
708 if (!validemail && (config.c_rfc822_strict_from == CFG_SMTP_FROM_REJECT)) {
709 syslog(LOG_ERR, "invalid sender '%s' - rejecting this message", msg->cm_fields['F']);
710 cprintf("550 Invalid sender '%s' - rejecting this message.\r\n", msg->cm_fields['F']);
714 if (msg->cm_fields['A'] != NULL) free(msg->cm_fields['A']);
715 if (msg->cm_fields['N'] != NULL) free(msg->cm_fields['N']);
716 if (msg->cm_fields['H'] != NULL) free(msg->cm_fields['H']);
717 if (msg->cm_fields['O'] != NULL) free(msg->cm_fields['O']);
718 msg->cm_fields['A'] = strdup(CC->user.fullname);
719 msg->cm_fields['N'] = strdup(config.c_nodename);
720 msg->cm_fields['H'] = strdup(config.c_humannode);
721 msg->cm_fields['O'] = strdup(MAILROOM);
724 if (msg->cm_fields['F'] != NULL) free(msg->cm_fields['F']);
725 msg->cm_fields['F'] = strdup(CC->cs_inet_email);
729 /* Set the "envelope from" address */
730 if (msg->cm_fields['P'] != NULL) {
731 free(msg->cm_fields['P']);
733 msg->cm_fields['P'] = strdup(sSMTP->from);
735 /* Set the "envelope to" address */
736 if (msg->cm_fields['V'] != NULL) {
737 free(msg->cm_fields['V']);
739 msg->cm_fields['V'] = strdup(sSMTP->recipients);
741 /* Submit the message into the Citadel system. */
742 valid = validate_recipients(
744 smtp_get_Recipients(),
745 (sSMTP->is_lmtp)? POST_LMTP: (CC->logged_in)? POST_LOGGED_IN: POST_EXTERNAL
748 /* If there are modules that want to scan this message before final
749 * submission (such as virus checkers or spam filters), call them now
750 * and give them an opportunity to reject the message.
752 if (sSMTP->is_unfiltered) {
756 scan_errors = PerformMessageHooks(msg, EVT_SMTPSCAN);
759 if (scan_errors > 0) { /* We don't want this message! */
761 if (msg->cm_fields['0'] == NULL) {
762 msg->cm_fields['0'] = strdup("Message rejected by filter");
765 sprintf(result, "550 %s\r\n", msg->cm_fields['0']);
768 else { /* Ok, we'll accept this message. */
769 msgnum = CtdlSubmitMsg(msg, valid, "", 0);
771 sprintf(result, "250 Message accepted.\r\n");
774 sprintf(result, "550 Internal delivery error\r\n");
778 /* For SMTP and ESMTP, just print the result message. For LMTP, we
779 * have to print one result message for each recipient. Since there
780 * is nothing in Citadel which would cause different recipients to
781 * have different results, we can get away with just spitting out the
782 * same message once for each recipient.
784 if (sSMTP->is_lmtp) {
785 for (i=0; i<sSMTP->number_of_recipients; ++i) {
786 cprintf("%s", result);
790 cprintf("%s", result);
793 /* Write something to the syslog(which may or may not be where the
794 * rest of the Citadel logs are going; some sysadmins want LOG_MAIL).
796 syslog((LOG_MAIL | LOG_INFO),
797 "%ld: from=<%s>, nrcpts=%d, relay=%s [%s], stat=%s",
800 sSMTP->number_of_recipients,
807 CtdlFreeMessage(msg);
808 free_recipients(valid);
809 smtp_data_clear(); /* clear out the buffers now */
814 * implements the STARTTLS command
816 void smtp_starttls(void)
818 char ok_response[SIZ];
819 char nosup_response[SIZ];
820 char error_response[SIZ];
822 sprintf(ok_response, "220 Begin TLS negotiation now\r\n");
823 sprintf(nosup_response, "554 TLS not supported here\r\n");
824 sprintf(error_response, "554 Internal error\r\n");
825 CtdlModuleStartCryptoMsgs(ok_response, nosup_response, error_response);
831 * Main command loop for SMTP server sessions.
833 void smtp_command_loop(void) {
835 citsmtp *sSMTP = SMTP;
838 syslog(LOG_EMERG, "Session SMTP data is null. WTF? We will crash now.\n");
839 return cit_panic_backtrace (0);
843 memset(cmdbuf, 0, sizeof cmdbuf); /* Clear it, just in case */
844 if (client_getln(cmdbuf, sizeof cmdbuf) < 1) {
845 syslog(LOG_CRIT, "SMTP: client disconnected: ending session.\n");
846 CC->kill_me = KILLME_CLIENT_DISCONNECTED;
849 syslog(LOG_INFO, "SMTP server: %s\n", cmdbuf);
850 while (strlen(cmdbuf) < 5) strcat(cmdbuf, " ");
852 if (sSMTP->command_state == smtp_user) {
853 smtp_get_user(cmdbuf);
856 else if (sSMTP->command_state == smtp_password) {
857 smtp_get_pass(cmdbuf);
860 else if (sSMTP->command_state == smtp_plain) {
861 smtp_try_plain(cmdbuf);
864 else if (!strncasecmp(cmdbuf, "AUTH", 4)) {
865 smtp_auth(&cmdbuf[5]);
868 else if (!strncasecmp(cmdbuf, "DATA", 4)) {
872 else if (!strncasecmp(cmdbuf, "HELO", 4)) {
873 smtp_hello(&cmdbuf[5], 0);
876 else if (!strncasecmp(cmdbuf, "EHLO", 4)) {
877 smtp_hello(&cmdbuf[5], 1);
880 else if (!strncasecmp(cmdbuf, "LHLO", 4)) {
881 smtp_hello(&cmdbuf[5], 2);
884 else if (!strncasecmp(cmdbuf, "HELP", 4)) {
888 else if (!strncasecmp(cmdbuf, "MAIL", 4)) {
889 smtp_mail(&cmdbuf[5]);
892 else if (!strncasecmp(cmdbuf, "NOOP", 4)) {
893 cprintf("250 NOOP\r\n");
896 else if (!strncasecmp(cmdbuf, "QUIT", 4)) {
897 cprintf("221 Goodbye...\r\n");
898 CC->kill_me = KILLME_CLIENT_LOGGED_OUT;
902 else if (!strncasecmp(cmdbuf, "RCPT", 4)) {
903 smtp_rcpt(&cmdbuf[5]);
906 else if (!strncasecmp(cmdbuf, "RSET", 4)) {
910 else if (!strcasecmp(cmdbuf, "STARTTLS")) {
915 cprintf("502 I'm afraid I can't do that.\r\n");
922 /*****************************************************************************/
923 /* MODULE INITIALIZATION STUFF */
924 /*****************************************************************************/
926 * This cleanup function blows away the temporary memory used by
929 void smtp_cleanup_function(void) {
931 /* Don't do this stuff if this is not an SMTP session! */
932 if (CC->h_command_function != smtp_command_loop) return;
934 syslog(LOG_DEBUG, "Performing SMTP cleanup hook\n");
940 const char *CitadelServiceSMTP_MTA="SMTP-MTA";
941 const char *CitadelServiceSMTPS_MTA="SMTPs-MTA";
942 const char *CitadelServiceSMTP_MSA="SMTP-MSA";
943 const char *CitadelServiceSMTP_LMTP="LMTP";
944 const char *CitadelServiceSMTP_LMTP_UNF="LMTP-UnF";
946 CTDL_MODULE_INIT(smtp)
950 CtdlRegisterServiceHook(config.c_smtp_port, /* SMTP MTA */
955 CitadelServiceSMTP_MTA);
958 CtdlRegisterServiceHook(config.c_smtps_port,
963 CitadelServiceSMTPS_MTA);
966 CtdlRegisterServiceHook(config.c_msa_port, /* SMTP MSA */
971 CitadelServiceSMTP_MSA);
973 CtdlRegisterServiceHook(0, /* local LMTP */
978 CitadelServiceSMTP_LMTP);
980 CtdlRegisterServiceHook(0, /* local LMTP */
981 file_lmtp_unfiltered_socket,
982 lmtp_unfiltered_greeting,
985 CitadelServiceSMTP_LMTP_UNF);
987 CtdlRegisterSessionHook(smtp_cleanup_function, EVT_STOP, PRIO_STOP + 250);
990 /* return our module name for the log */