1、通过postfixadmin进行啬的用户，当勾选了"Send Welcome mail"选项后，服务器在发送这封邮件时出错：
-------------------------------------------------------------------
Mar 22 15:38:51 CiRedMail postfix/smtpd[3497]: connect from CiRedMail.xxx.com.cn[127.0.0.1]
Mar 22 15:38:52 CiRedMail postfix/smtpd[3497]: NOQUEUE: reject: RCPT from CiRedMail.xxx.com.cn[127.0.0.1]: 550 5.1.0 <postmaster@xxx.com.cn>: Sender address rejected: User unknown in virtual mailbox table; from=<postmaster@xxx.com.cn> to=<username@xxx.com.cn> proto=ESMTP helo=<ciredmail.xxx.com.cn>
Mar 22 15:38:52 CiRedMail postfix/smtpd[3497]: warning: non-SMTP command from CiRedMail.xxx.com.cn[127.0.0.1]: To: username@xxx.com.cn

2、在测试假期自动回复时，出现了主题中文乱码的情况：
-------------------------------------------------------------------
Return-Path: <MAILER-DAEMON>
Delivered-To: username@xxx.com.cn
Received: by CiRedMail.xxx.com.cn (iRedMail, from userid 500)
    id 84B2E1289B6; Mon, 22 Mar 2010 15:57:27 +0800 (CST)
Message-ID: <dovecot-1269244647-450846-0@CiRedMail.xxx.com.cn>
Date: Mon, 22 Mar 2010 15:57:27 +0800
X-Sieve: CMU Sieve 2.3
From: www@xxx.com.cn
To: <username@xxx.com.cn>
Subject: Auto: Fwd: �??�??�??�?��?已读�?: �?�?�?�件
In-Reply-To: <b83391021c25c96b9342168a29642224@127.0.0.1>
Auto-Submitted: auto-replied (vacation)
Precedence: bulk
MIME-Version: 1.0
Content-Type: text/plain; charset=utf-8
Content-Transfer-Encoding: 8bit

您好！

我现在不，有事请与我的同事联系，谢谢！

请问版主如何更改邮箱管理员密码呢？谢谢！

系统环境：CentOS5.2+iRedmail 4.0
搭建完成后已经正常运行了3个月，最近出现不能接收外网邮件的问题，请版主指教，谢谢！
可以发给外网邮件，但是不能接收外网邮件，下面的日志了我发给163邮箱的，可以接收，但是不是从163发给本地邮箱。
从内网邮箱发给163时候的日志如下：
Aug 14 10:41:09 postfix postfix/cleanup[29449]: B2C85C8805C: message-id=<200908141041029216150@wudo.com.cn>
Aug 14 10:41:09 postfix postfix/qmgr[27396]: B2C85C8805C: from=<changjun@wudo.com.cn>, size=1598, nrcpt=1 (queue active)
Aug 14 02:41:09 postfix postfix/smtpd[29445]: disconnect from unknown[172.16.1.200]
Aug 14 10:41:10 postfix postfix/smtpd[29453]: connect from postfix.wudo.com.cn[127.0.0.1]
Aug 14 02:41:10 postfix postfix/smtpd[29453]: 16A82C8805D: client=postfix.w.wudo.com.cn[127.0.0.1]
Aug 14 10:41:10 postfix postfix/cleanup[29449]: 16A82C8805D: message-id=<200908141041029216150@wudo.com.cn>
Aug 14 10:41:10 postfix postfix/qmgr[27396]: 16A82C8805D: from=<changjun@wudo.com.cn>, size=2482, nrcpt=1 (queue active)
Aug 14 02:41:10 postfix postfix/smtpd[29453]: disconnect from postfix.wudo.com.cn[127.0.0.1]
Aug 14 10:41:10 postfix amavis[3000]: (03000-05) Passed CLEAN, MYNETS LOCAL [172.16.1.200] [172.16.1.200] <changjun@wudo.com.cn> -> <xf2008@163.com>, Message-ID: <200908141041029216150@wudo.com.cn>, mail_id: H-8zyMDECyru, Hits: -6.687, size: 1598, queued_as: 16A82C8805D, 355 ms
Aug 14 10:41:10 postfix postfix/smtp[29450]: B2C85C8805C: to=<xf2008@163.com>, relay=127.0.0.1[127.0.0.1]:10024, delay=0.54, delays=0.18/0.01/0/0.36, dsn=2.0.0, status=sent (250 2.0.0 Ok, id=03000-05, from MTA([127.0.0.1]:10025): 250 2.0.0 Ok: queued as 16A82C8805D)
Aug 14 10:41:10 postfix postfix/qmgr[27396]: B2C85C8805C: removed
Aug 14 10:41:26 postfix postfix/smtp[29457]: 16A82C8805D: to=<xf2008@163.com>, relay=mxnew-d.163.com[220.181.12.68]:25, delay=17, delays=0.01/0.01/15/1.5, dsn=2.0.0, status=sent (250 Mail OK queued as mx18,RMCowLDrGAW5zoRKo1JeHw--.57193S2 1250217670)
Aug 14 10:41:26 postfix postfix/qmgr[27396]: 16A82C8805D: removed

从163邮箱发给内网时候的日志如下：
Aug 14 10:44:29 postfix postfix/anvil[29447]: statistics: max connection rate 1/60s for (smtp:172.16.1.200) at Aug 14 10:41:09
Aug 14 10:44:29 postfix postfix/anvil[29447]: statistics: max connection count 1 for (smtp:172.16.1.200) at Aug 14 10:41:09
Aug 14 10:44:29 postfix postfix/anvil[29447]: statistics: max cache size 1 at Aug 14 10:41:09

163的退信：

退信原因： 未知退信原因
英文说明:Can not connect to wali.com.cn:210.72.232.132:25

我的主机名称是 postfix.wudo.com.cn

我telnet 110 25 端口也正常，结果如下：
telnet postfix.wudo.com.cn 110
+OK Dovecot ready.

telnet postfix.wudo.com.cn 25
220 postfix.wali.com.cn ESMTP iRedMail

DNS设置；
postfix A 202.105.58.162
MX 202.105.58.162.