iRedmail能发邮件，但收不到。使用roundcubemail和outlook2003进行邮件收发，发现可以发出去，但是收不到，一直提示"status=deferred (command died with signal 11: "/usr/libexec/dovecot/deliver")，不知道是如何引起的，还请大家帮忙看看。日志如下：
Aug 31 16:20:57 mail postfix/qmgr[18749]: DD61D188009F: removed
Aug 31 16:20:57 mail postfix/pipe[18868]: 084F318800A6: to=<feifei@moyonline.com>, relay=dovecot, delay=0.01, delays=0/0/0/0.01, dsn=5.3.0, status=bounced (Command died with signal 11: "/usr/libexec/dovecot/deliver")
Aug 31 16:20:57 mail postfix/cleanup[18853]: 0B591188009F: message-id=<201008310                                                                                        82057.0B591188009F@mail1.moyonline.com>
Aug 31 16:20:57 mail postfix/bounce[18870]: 084F318800A6: sender non-delivery notification: 0B591188009F
Aug 31 16:20:57 mail postfix/qmgr[18749]: 0B591188009F: from=<>, size=3367, nrcpt=1 (queue active)
Aug 31 16:20:57 mail postfix/qmgr[18749]: 084F318800A6: removed
Aug 31 16:20:57 mail postfix/pipe[18868]: 0B591188009F: to=<feifei@moyonline.com>, relay=dovecot, delay=0, delays=0/0/0/0, dsn=5.3.0, status=bounced (Command died with signal 11: "/usr/libexec/dovecot/deliver")
Aug 31 16:20:57 mail postfix/qmgr[18749]: 0B591188009F: removed
bounced (CommAug 31 16:34:07 mail postfix/qmgr[18749]: 674711880008: from=<policyd@mail.moyonline.com>, size=1165, nrcpt=1 (queueactive)
Aug 31 16:34:07 mail postfix/qmgr[18749]: DE36B1880010: from=<policyd@mail.moyonline.com>, size=1149, nrcpt=1 (queue active)
and died with signal 11: "/usr/libexec/dovecot/deliver"Aug 31 16:34:37 mail postfix/smtp[19507]: connect to mail.moyonline.com[222.66.156.194]:25: Connection timed out
Aug 31 16:34:37 mail postfix/smtp[19508]: connect to mail.moyonline.com[222.66.156.194]:25: Connection timed out
Aug 31 16:35:07 mail postfix/smtp[19507]: connect to mail.moyonline.com[222.66.156.194]:25: Connection timed out
Aug 31 16:35:07 mail postfix/smtp[19507]: 674711880008: to=<policyd@mail.moyonline.com>, relay=none, delay=8811, delays=8751/0.02/61/0, dsn=4.4.1, status=deferred (connect to mail.moyonline.com[222.66.156.194]:25: Connection timed out)
Aug 31 16:35:07 mail postfix/smtp[19508]: connect to mail.moyonline.com[222.66.156.194]:25: Connection timed out
Aug 31 16:35:07 mail postfix/smtp[19508]: DE36B1880010: to=<policyd@mail.moyonline.com>, relay=none, delay=8811, delays=8750/0.01/61/0, dsn=4.4.1, status=deferred (connect to mail.moyonline.com[222.66.156.194]:25: Connection timed out)