~]# service dovecot start
Starting Dovecot Imap: Warning: Last died with error (see error log for more information): Time just moved backwards by 6 seconds. This might cause a lot of problems, so I'll just kill myself now. http://wiki.dovecot.org/TimeMovedBackwards
                                                           [  OK  ]
提示好像是时间同步有问题，我现在同步的时候是中科院的时间服务器，还是一样，貌似时间比iredmail默认的时候快了，就会自动退出，慢了倒不会，一时找不到解决问题的办法，各位帮帮忙，在此谢谢了！