==== 提供基本信息便于分析问题并得到快速回复 ====
- iRedMail 版本：
- 7.0

- 使用的 Linux/BSD 发行版名称及版本号
- Centos 5.5

- 与您的问题相关的日志信息：
- 张工你好.之前使用一直正常.是自行修改成与AD域整合的方式
- 现在服务器换了机房。把grep到有IP地址的地方都进行了修改成新的IP还是无法正常连接到AD域。Hosts文件与解析也已修改
- web上登陆提示 连接到服务器失败
- 张工和各位有什么提示需要修改的地方吗.

tail -200 dovecot.log
Apr 11 07:41:35 imap-login: Error: Can't connect to auth server at default: Resource temporarily unavailable
Apr 11 07:41:35 imap-login: Error: Can't connect to auth server at default: Resource temporarily unavailable
Apr 11 07:41:35 pop3-login: Error: Can't connect to auth server at default: Resource temporarily unavailable
Apr 11 07:41:35 pop3-login: Error: Can't connect to auth server at default: Resource temporarily unavailable
Apr 11 07:41:35 pop3-login: Error: Can't connect to auth server at default: Resource temporarily unavailable
Apr 11 07:41:35 imap-login: Error: Can't connect to auth server at default: Resource temporarily unavailable
Apr 11 07:41:35 imap-login: Error: Can't connect to auth server at default: Resource temporarily unavailable
Apr 11 07:41:35 pop3-login: Error: Can't connect to auth server at default: Resource temporarily unavailable
Apr 11 07:41:35 pop3-login: Error: Can't connect to auth server at default: Resource temporarily unavailable
Apr 11 07:41:35 imap-login: Error: Can't connect to auth server at default: Resource temporarily unavailable
Apr 11 07:41:35 imap-login: Error: Can't connect to auth server at default: Resource temporarily unavailable
Apr 11 07:41:35 pop3-login: Error: Can't connect to auth server at default: Resource temporarily unavailable
Apr 11 07:41:35 imap-login: Error: Can't connect to auth server at default: Resource temporarily unavailable
Apr 11 07:41:35 pop3-login: Error: Can't connect to auth server at default: Resource temporarily unavailable
Apr 11 07:41:35 pop3-login: Error: Can't connect to auth server at default: Resource temporarily unavailable
Apr 11 07:41:35 pop3-login: Error: Can't connect to auth server at default: Resource temporarily unavailable
Apr 11 07:41:35 dovecot: Warning: Killed with signal 15 (by pid=16079 uid=0 code=kill)
Apr 11 07:41:35 pop3-login: Info: Disconnected: Shutting down (no au
Apr 11 07:41:35 pop3-login: Info: Disconnected: Shutting down (no auth attempts): rip=117.79.232.224, lip=118.26.201.250
Apr 11 07:41:35 imap-login: Info: Disconnected: Shutting down (no auth attempts): rip=58.249.24.21, lip=118.26.201.250
Apr 11 07:41:35 imap-login: Info: Disconnected: Shutting down (no auth attempts): rip=218.247.145.2, lip=118.26.201.250
Apr 11 07:41:36 dovecot: Info: Dovecot v1.2.16 starting up (core dumps disabled)
Apr 11 07:41:36 auth(default): Fatal: Socket already exists: /var/spool/postfix/dovecot-auth
Apr 11 07:41:36 dovecot: Fatal: Auth process died too early - shutting down

tailf /var/log/maillog
[root@mail ~]# tailf /var/log/maillog
Apr 11 08:10:40 mail postfix/master[16064]: warning: process /usr/libexec/postfix/smtpd pid 16820 exit status 1
Apr 11 08:10:40 mail postfix/master[16064]: warning: process /usr/libexec/postfix/smtpd pid 16821 exit status 1
Apr 11 08:10:40 mail postfix/master[16064]: warning: process /usr/libexec/postfix/smtpd pid 16822 exit status 1
Apr 11 08:10:40 mail postfix/master[16064]: warning: process /usr/libexec/postfix/smtpd pid 16823 exit status 1
Apr 11 08:10:40 mail postfix/master[16064]: warning: process /usr/libexec/postfix/smtpd pid 16824 exit status 1
Apr 11 08:10:40 mail postfix/master[16064]: warning: process /usr/libexec/postfix/smtpd pid 16825 exit status 1
Apr 11 08:10:40 mail postfix/master[16064]: warning: process /usr/libexec/postfix/smtpd pid 16826 exit status 1
Apr 11 08:10:40 mail postfix/master[16064]: warning: process /usr/libexec/postfix/smtpd pid 16827 exit status 1
Apr 11 08:10:40 mail postfix/master[16064]: warning: process /usr/libexec/postfix/smtpd pid 16828 exit status 1
Apr 11 08:10:40 mail postfix/master[16064]: warning: process /usr/libexec/postfix/smtpd pid 16829 exit status 1
Apr 11 08:18:55 mail postfix/qmgr[17137]: 8B2287D2BA0: from=<>, size=2447, nrcpt=1 (queue active)
Apr 11 08:18:55 mail postfix/qmgr[17137]: CE2977D2BB1: from=<root@mail.777.com>, size=672, nrcpt=1 (queue active)
Apr 11 08:18:55 mail postfix/qmgr[17137]: 9F9399F0863: from=<root@mail.777.com>, size=672, nrcpt=1 (queue active)
Apr 11 08:18:55 mail postfix/qmgr[17137]: 7F3A07D2BAC: from=<root@mail.777.com>, size=672, nrcpt=1 (queue active)
Apr 11 08:18:55 mail postfix/smtpd[17141]: warning: SASL: Connect to ./dovecot-auth failed: Connection refused
Apr 11 08:18:55 mail postfix/smtpd[17141]: fatal: no SASL authentication mechanisms
Apr 11 08:18:56 mail postfix/master[17134]: warning: process /usr/libexec/postfix/local pid 17140 exit status 1
Apr 11 08:18:56 mail postfix/master[17134]: warning: /usr/libexec/postfix/local: bad command startup -- throttling
Apr 11 08:18:56 mail postfix/master[17134]: warning: process /usr/libexec/postfix/smtpd pid 17141 exit status 1
Apr 11 08:18:56 mail postfix/master[17134]: warning: /usr/libexec/postfix/smtpd: bad command startup -- throttling
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