==== 必填信息。没有填写将不予回复 ====
- iRedMail 版本号：
- 使用哪个数据库存储用户帐号（OpenLDAP，MySQL，PostgreSQL）：
- 使用的 Linux/BSD 发行版名称及版本号：
- 与您的问题相关的日志信息：
==== ==== 必填信息。没有填写将不予回复 ====
- iRedMail 版本号：0.9.5
- 使用哪个数据库存储用户帐号（MySQL）：
- 使用的 Linux/BSD 发行版名称及版本号：CentOS6.6
- 与您的问题相关的日志信息：
====

问题描述：外部邮件向iRedmail发送邮件提示：“收件人地址错误或不存在，邮件无法送达，正在进行第4次重投。”，大概20-30分钟才能收到邮件

自己尝试的方法： service dovecot restart   [当时会秒收，但过一会儿就不行了]

求大神帮忙处理，谢谢！

/var/log/dovecot.log 信息如下：

May 09 13:43:51 imap(garywu@beiyo.net): Info: Disconnected: Logged out in=343 out=2198
May 09 13:44:51 auth-worker(16325): Info: mysql(127.0.0.1): Connected to database vmail
May 09 13:44:51 imap-login: Info: Login: user=<garywu@beiyo.net>, method=PLAIN, rip=127.0.0.1, lip=127.0.0.1, mpid=16324, secured, session=<zS6wTmIyOgB/AAAB>
May 09 13:44:51 imap(garywu@beiyo.net): Info: Disconnected: Logged out in=343 out=2198
May 09 13:45:51 imap-login: Info: Login: user=<garywu@beiyo.net>, method=PLAIN, rip=127.0.0.1, lip=127.0.0.1, mpid=16331, secured, session=<1LxDUmIyPwB/AAAB>
May 09 13:45:51 imap(garywu@beiyo.net): Info: Disconnected: Logged out in=343 out=2198
May 09 13:46:51 auth-worker(16338): Info: mysql(127.0.0.1): Connected to database vmail
May 09 13:46:51 imap-login: Info: Login: user=<garywu@beiyo.net>, method=PLAIN, rip=127.0.0.1, lip=127.0.0.1, mpid=16337, secured, session=<nGjXVWIyQwB/AAAB>
May 09 13:46:51 imap(garywu@beiyo.net): Info: Disconnected: Logged out in=343 out=2198
May 09 13:47:51 imap-login: Info: Login: user=<garywu@beiyo.net>, method=PLAIN, rip=127.0.0.1, lip=127.0.0.1, mpid=16344, secured, session=<d29rWWIySAB/AAAB>
May 09 13:47:51 imap(garywu@beiyo.net): Info: Disconnected: Logged out in=343 out=2198
May 09 13:48:51 imap-login: Info: Login: user=<garywu@beiyo.net>, method=PLAIN, rip=127.0.0.1, lip=127.0.0.1, mpid=16350, secured, session=<Vnn+XGIyTAB/AAAB>
May 09 13:48:51 imap(garywu@beiyo.net): Info: Disconnected: Logged out in=343 out=2198
May 09 13:49:51 imap-login: Info: Login: user=<garywu@beiyo.net>, method=PLAIN, rip=127.0.0.1, lip=127.0.0.1, mpid=16358, secured, session=<zP2RYGIyUAB/AAAB>
May 09 13:49:51 imap(garywu@beiyo.net): Info: Disconnected: Logged out in=343 out=2198
May 09 13:50:51 auth-worker(16368): Info: mysql(127.0.0.1): Connected to database vmail
May 09 13:50:51 imap-login: Info: Login: user=<garywu@beiyo.net>, method=PLAIN, rip=127.0.0.1, lip=127.0.0.1, mpid=16367, secured, session=<C8IlZGIyVAB/AAAB>
May 09 13:50:52 imap(garywu@beiyo.net): Info: Disconnected: Logged out in=343 out=2198
May 09 13:51:51 imap-login: Info: Login: user=<garywu@beiyo.net>, method=PLAIN, rip=127.0.0.1, lip=127.0.0.1, mpid=16392, secured, session=<bxe5Z2IyawB/AAAB>
May 09 13:51:52 imap(garywu@beiyo.net): Info: Disconnected: Logged out in=556 out=9050
May 09 13:52:51 imap-login: Info: Login: user=<garywu@beiyo.net>, method=PLAIN, rip=127.0.0.1, lip=127.0.0.1, mpid=16399, secured, session=<oalMa2IybwB/AAAB>
May 09 13:52:51 dict: Info: mysql(127.0.0.1): Connected to database vmail
May 09 13:52:51 imap(garywu@beiyo.net): Info: Disconnected: Logged out in=343 out=2260
[root@mail ~]#
[root@mail ~]#

更多log信息，请详见附件！