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- iRedMail 版本号：v0.9.0
- 使用哪个数据库存储用户帐号（OpenLDAP，MySQL，PostgreSQL）：MySQL
- 使用的 Linux/BSD 发行版名称及版本号：Ubuntu 14.04
- 与您的问题相关的日志信息：

Feb  6 17:07:19 mail postfix/qmgr[2931]: 69291265C9: from=<sogo@mail.jandb.cn>, size=1054, nrcpt=1 (queue active)
Feb  6 17:07:19 mail postfix/qmgr[2931]: 66B56265CB: from=<sogo@mail.jandb.cn>, size=843, nrcpt=1 (queue active)
Feb  6 17:07:19 mail postfix/qmgr[2931]: 3BE6D265C7: from=<sogo@mail.jandb.cn>, size=1054, nrcpt=1 (queue active)
Feb  6 17:07:19 mail postfix/qmgr[2931]: 31084265C6: from=<sogo@mail.jandb.cn>, size=843, nrcpt=1 (queue active)
Feb  6 17:07:19 mail postfix/qmgr[2931]: BD67527786: from=<sogo@mail.jandb.cn>, size=843, nrcpt=1 (queue active)
Feb  6 17:07:19 mail postfix/qmgr[2931]: A55EA265CA: from=<sogo@mail.jandb.cn>, size=1054, nrcpt=1 (queue active)
Feb  6 17:07:19 mail postfix/qmgr[2931]: A37E5265CD: from=<sogo@mail.jandb.cn>, size=843, nrcpt=1 (queue active)
Feb  6 17:07:19 mail postfix/pipe[3442]: 69291265C9: to=<postmaster@jandb.cn>, relay=dovecot, delay=2478, delays=2478/0.02/0/0.07, dsn=2.0Feb  6 17:07:19 mail postfix/qmgr[2931]: 69291265C9: removed
Feb  6 17:07:19 mail postfix/pipe[3447]: 31084265C6: to=<postmaster@jandb.cn>, relay=dovecot, delay=2537, delays=2537/0.03/0/0.06, dsn=2.0.0, status=sent (delivered via dovecot service)
Feb  6 17:07:19 mail postfix/qmgr[2931]: 31084265C6: removed
Feb  6 17:07:19 mail postfix/pipe[3443]: 66B56265CB: to=<postmaster@jandb.cn>, relay=dovecot, delay=2478, delays=2478/0.01/0/0.1, dsn=2.0.0, status=sent (delivered via dovecot service)
Feb  6 17:07:19 mail postfix/qmgr[2931]: 66B56265CB: removed
Feb  6 17:07:19 mail postfix/pipe[3466]: A37E5265CD: to=<postmaster@jandb.cn>, relay=dovecot, delay=2418, delays=2418/0.08/0/0.03, dsn=2.0.0, status=sent (delivered via dovecot service)
Feb  6 17:07:19 mail postfix/qmgr[2931]: A37E5265CD: removed
Feb  6 17:07:19 mail postfix/pipe[3442]: A55EA265CA: to=<postmaster@jandb.cn>, relay=dovecot, delay=2418, delays=2418/0.07/0/0.05, dsn=2.0.0, status=sent (delivered via dovecot service)
Feb  6 17:07:19 mail postfix/qmgr[2931]: A55EA265CA: removed
Feb  6 17:07:19 mail postfix/pipe[3445]: 3BE6D265C7: to=<postmaster@jandb.cn>, relay=dovecot, delay=2537, delays=2537/0.02/0/0.1, dsn=2.0.0, status=sent (delivered via dovecot service)
Feb  6 17:07:19 mail postfix/qmgr[2931]: 3BE6D265C7: removed.0, status=sent (delivered via dovecot service)
Feb  6 17:07:19 mail postfix/pipe[3449]: BD67527786: to=<postmaster@jandb.cn>, relay=dovecot, delay=3138, delays=3138/0.04/0/0.08, dsn=2.0.0, status=sent (delivered via dovecot service)
Feb  6 17:07:19 mail postfix/qmgr[2931]: BD67527786: removed
Feb  6 17:07:39 mail postfix/smtpd[3481]: connect from localhost[127.0.0.1]
Feb  6 17:07:39 mail roundcube: SMTP server does not support authentication ():
Feb  6 17:07:39 mail roundcube: SMTP Error: SMTP error: Authentication failure: SMTP server does not support authentication (Code: ) in /usr/share/apache2/roundcubemail-1.0.4/program/lib/Roundcube/rcube.php on line 1505 (POST /mail/?_task=mail&_unlock=loading1423242461803&_lang=undefined&_framed=1?_task=mail&_action=send)
Feb  6 17:07:39 mail postfix/smtpd[3481]: disconnect from localhost[127.0.0.1]

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我不知道这是哪里出了问题，看了论坛里面很多帖子，但是没有找到合适的解决方法，谢谢！