我有一个使用server.app运行的OS X邮件服务器。 在后台运行Postfix。 最近，我的邮件队列已经堵塞，我不太清楚为什么。 我会尝试用sudo postqueue -f强制队列，但是它不会做任何事情。 让服务器处理队列的唯一方法是重新启动系统。
邮件服务器可以正常工作2-3天，然后再次开始堵塞。 这或多或less会迫使我每隔2-3天重新启动一次系统，以确保邮件正在交付。
如果我运行mailq ，第一个条目如下所示：
0410E1878AAF 16737 Wed Jul 22 11:38:06 [email protected] (host 127.0.0.1[127.0.0.1] said: 451 4.5.0 id=77854-02 - Temporary MTA failure on relaying, From MTA() during fwd-connect (All attempts (1) failed connecting to smtp:[127.0.0.1]:10025): id=77854-02 (in reply to end of DATA command)) [email protected]
所有后续的条目看起来像这样：
048E21879841 16926 Wed Jul 22 13:07:16 [email protected] (connect to 127.0.0.1[127.0.0.1]:10024: Can't assign requested address) [email protected]
如果我在第一个条目发生的时候查看/var/log/mail.log ，我看到：
Jul 22 11:38:06 mymailserver.com postfix/postscreen[73556]: CONNECT from [198.52.135.223]:39777 to [MYSERVER'SIPADDRESS]:25 Jul 22 11:38:06 mymailserver.com postfix/postscreen[73556]: PREGREET 29 after 0.08 from [198.52.135.223]:39777: EHLO shunpiking.mexilar.xyz\r\n Jul 22 11:38:06 mymailserver.com postfix/smtpd[73557]: connect from shunpiking.mexilar.xyz[198.52.135.223] Jul 22 11:42:52 mymailserver.com postfix/anvil[73561]: statistics: max connection rate 1/60s for (smtpd:198.52.135.223) at Jul 22 11:38:06 Jul 22 11:42:52 mymailserver.com postfix/anvil[73561]: statistics: max connection count 1 for (smtpd:198.52.135.223) at Jul 22 11:38:06 Jul 22 11:42:52 mymailserver.com postfix/anvil[73561]: statistics: max cache size 1 at Jul 22 11:38:06
我在上面的mail.log条目中编辑了服务器的实际主机名和IP地址。
在我看来，服务器越来越受到打击，并试图限制自己，但我不明白为什么一切都closures了。 有没有人有一些见解，如何修复这个问题？
编辑：
这是来自/Library/Server/Mail/Config/postfix/master.cf的master.cf文件：
# # Postfix master process configuration file. For details on the format # of the file, see the master(5) manual page (command: "man 5 master"). # # Do not forget to execute "postfix reload" after editing this file. # # ========================================================================== # service type private unpriv chroot wakeup maxproc command + args # (yes) (yes) (yes) (never) (100) # ========================================================================== # ==== Begin auto-generated section ======================================== # This section of the master.cf file is auto-generated by the Server Admin # Mail backend plugin whenever mails settings are modified. smtp inet n - n - 1 postscreen smtpd pass - - n - - smtpd -o receive_override_options=no_address_mappings dnsblog unix - - n - 0 dnsblog tlsproxy unix - - n - 0 tlsproxy submission inet n - n - - smtpd -o smtpd_tls_security_level=encrypt smtp unix - - n - - smtp # === End auto-generated section =========================================== proxywrite unix - - n - 1 proxymap # Modern SMTP clients communicate securely over port 25 using the STARTTLS command. # Some older clients, such as Outlook 2000 and its predecessors, do not properly # support this command and instead assume a preconfigured secure connection # on port 465. This was sometimes called "smtps", but such usage was never # approved by the IANA and therefore conflicts with another, legitimate assignment. # For more details about managing secure SMTP connections with postfix, please see: # http://www.postfix.org/TLS_README.html # To read more about configuring secure connections with Outlook 2000, please read: # http://support.microsoft.com/default.aspx?scid=kb;en-us;Q307772 # Apple does not support the use of port 465 for this purpose. # After determining that connecting clients do require this behavior, you may choose # to manually enable support for these older clients by uncommenting the following # four lines. #465 inet n - n - - smtpd # -o smtpd_tls_wrappermode=yes # -o smtpd_sasl_auth_enable=yes # -o smtpd_client_restrictions=permit_sasl_authenticated,reject # -o milter_macro_daemon_name=ORIGINATING #628 inet n - n - - qmqpd pickup fifo n - n 60 1 pickup -o content_filter=smtp-amavis:[127.0.0.1]:10024 cleanup unix n - n - 0 cleanup qmgr fifo n - n 300 1 qmgr #qmgr fifo n - n 300 1 oqmgr tlsmgr unix - - n 1000? 1 tlsmgr rewrite unix - - n - - trivial-rewrite bounce unix - - n - 0 bounce defer unix - - n - 0 bounce trace unix - - n - 0 bounce verify unix - - n - 1 verify sacl-cache unix - - n - 1 sacl-cache flush unix n - n 1000? 0 flush proxymap unix - - n - - proxymap # When relaying mail as backup MX, disable fallback_relay to avoid MX loops relay unix - - n - - smtp -o smtp_fallback_relay= # -o smtp_helo_timeout=5 -o smtp_connect_timeout=5 showq unix n - n - - showq error unix - - n - - error retry unix - - n - - error discard unix - - n - - discard local unix - nn - - local virtual unix - nn - - virtual lmtp unix - - n - - lmtp anvil unix - - n - 1 anvil scache unix - - n - 1 scache # # ==================================================================== # Interfaces to non-Postfix software. Be sure to examine the manual # pages of the non-Postfix software to find out what options it wants. # # Many of the following services use the Postfix pipe(8) delivery # agent. See the pipe(8) man page for information about ${recipient} # and other message envelope options. # ==================================================================== # # maildrop. See the Postfix MAILDROP_README file for details. # Also specify in main.cf: maildrop_destination_recipient_limit=1 # #maildrop unix - nn - - pipe # flags=DRhu user=vmail argv=/usr/local/bin/maildrop -d ${recipient} # # ==================================================================== # # Recent Cyrus versions can use the existing "lmtp" master.cf entry. # # Specify in cyrus.conf: # lmtp cmd="lmtpd -a" listen="localhost:lmtp" proto=tcp4 # # Specify in main.cf one or more of the following: # mailbox_transport = lmtp:inet:localhost # virtual_transport = lmtp:inet:localhost # # ==================================================================== # # Cyrus 2.1.5 (Amos Gouaux) # Also specify in main.cf: cyrus_destination_recipient_limit=1 # #cyrus unix - nn - - pipe # user=_cyrus argv=/usr/bin/cyrus/bin/deliver -e -r ${sender} -m ${extension} ${user} # # ==================================================================== # # Old example of delivery via Cyrus. # #old-cyrus unix - nn - - pipe # flags=R user=cyrus argv=/cyrus/bin/deliver -e -m ${extension} ${user} # # ==================================================================== # # Dovecot # dovecot unix - nn - 25 pipe # flags=DRhu user=_dovecot:mail argv=/Applications/Server.app/Contents/ServerRoot/usr/libexec/dovecot/dovecot-lda -d ${user} # Use these settings to enable +addressing ([email protected]) flags=DRhu user=_dovecot:mail argv=/Applications/Server.app/Contents/ServerRoot/usr/libexec/dovecot/dovecot-lda -d ${user} -a ${recipient} -m ${extension} # # ==================================================================== # # Greylist policy server # policy unix - nn - - spawn user=nobody:mail argv=/usr/bin/perl /usr/libexec/postfix/greylist.pl # # ==================================================================== # # See the Postfix UUCP_README file for configuration details. # #uucp unix - nn - - pipe # flags=Fqhu user=uucp argv=uux -r -n -z -a$sender - $nexthop!rmail ($recipient) # # ==================================================================== # # Other external delivery methods. # #ifmail unix - nn - - pipe # flags=F user=ftn argv=/usr/lib/ifmail/ifmail -r $nexthop ($recipient) # #bsmtp unix - nn - - pipe # flags=Fq. user=bsmtp argv=/usr/local/sbin/bsmtp -f $sender $nexthop $recipient # #scalemail-backend unix - nn - 2 pipe # flags=R user=scalemail argv=/usr/lib/scalemail/bin/scalemail-store # ${nexthop} ${user} ${extension} # #mailman unix - nn - - pipe # flags=FR user=list argv=/usr/lib/mailman/bin/postfix-to-mailman.py # ${nexthop} ${user} smtp-amavis unix - - y - 2 smtp -o smtp_data_done_timeout=1200 -o smtp_send_xforward_command=yes -o disable_dns_lookups=yes -o max_use=20 127.0.0.1:10025 inet n - y - - smtpd -o content_filter= -o smtpd_tls_security_level=none -o smtpd_delay_reject=no -o smtpd_client_restrictions=permit_mynetworks,reject -o smtpd_helo_restrictions= -o smtpd_sender_restrictions= -o smtpd_recipient_restrictions=permit_mynetworks,reject -o smtpd_data_restrictions=reject_unauth_pipelining -o smtpd_end_of_data_restrictions= -o smtpd_restriction_classes= -o mynetworks=127.0.0.0/8 -o smtpd_error_sleep_time=0 -o smtpd_soft_error_limit=1001 -o smtpd_hard_error_limit=1000 -o smtpd_client_connection_count_limit=0 -o smtpd_client_connection_rate_limit=0 -o receive_override_options=no_header_body_checks,no_unknown_recipient_checks,no_milters -o local_header_rewrite_clients= -o smtpd_milters= -o local_recipient_maps= -o relay_recipient_maps=
编辑2：
经过进一步检查，当事情开始阻塞时，我仍然可以通过键入telnet 127.0.0.1 10024在10024上telnet 127.0.0.1 10024 ，但是我不能telnet到10025.我得到以下错误：
Trying ::1... telnet: connect to address ::1: Connection refused Trying 127.0.0.1... telnet: connect to address 127.0.0.1: Can't assign requested address Trying fe80::1... telnet: connect to address fe80::1: Connection refused telnet: Unable to connect to remote host
也许这会导致更多的线索？