各位版友你们好，我用imail在服务器上建立了imail服务器，已经一年多了，收发邮件正常，但是跟一家公司通信时老是被退回，但是有时候也能发过去，他们也能发过来，没有被退回过，
下面是被退回的列子
>Unknown user: yucb@v2tech.com
>
>
>Original message follows.
>
>Received: from hp520 [125.110.239.140] by localhost with ESMTP
>  (SMTPD32-8.01) id ADF56B00B4; Thu, 23 Aug 2007 14:49:25 +0800
>Date: Thu, 23 Aug 2007 14:49:27 +0800
>From: "george" <george.ye@easyget.com.cn>
>To: "yucb" <yucb@v2tech.com>
>References: <200708231356385761800@v2tech.com>
>Subject: =?gb2312?B?UmU6INfctPrQrdLp?=
>Message-ID: <200708231449275935395@easyget.com.cn>
>X-mailer: Foxmail 6, 8, 105, 25 [cn]
>Mime-Version: 1.0
>Content-Type: multipart/mixed;
> boundary="=====001_Dragon104043024042_====="
>
>This is a multi-part message in MIME format.
>
>--=====001_Dragon104043024042_=====
>Content-Type: text/plain;
> charset="gb2312"
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>
>0M8R4KGxGuEAAAAAAAAAAAAAAAAAAAAAPgADAP7/CQAGAAAAAAAAAAAAAAACAAAA9QAAAAAAAAAA
>EAAA9wAAAAEAAAD+////AAAAAPMAAAD0AAAA////////////////////////////////////////
>
>[message truncated]
>
>.
= = = = = = = = = = = = = = = = = = = =

恳请帮我看一下  ，谢谢 ！！

这退信看不出什么，除非你输错对方地址。

贴日志吧。

我在SPOOL中看到有两种.log格式 spamxxx.log、Wxxxx.log、如：spam0824.log 和W2070823.log 另外还有来两个 Q4d1f00400118834a.SMD D4d1f00400118834a.SMD是什么意思 ，spool下面还有个web 文件夹是什么意思

贴那种日志

Unknown user: dujiao@v2tech.com
Unknown user: fuxw@v2tech.com
Unknown user: huangjg@v2tech.com
Unknown user: leewei@v2tech.com
Unknown user: luojf@v2tech.com
Unknown user: miaoxh@v2tech.com
Unknown user: yangwl@v2tech.com
Unknown user: yucb@v2tech.com
Unknown user: zhangguang@v2tech.com
Unknown user: luojf@ivage.com


Original message follows.

Received: from richard [125.110.236.198] by localhost with ESMTP
  (SMTPD32-8.01) id A09C20138; Mon, 20 Aug 2007 09:38:36 +0800
Date: Mon, 20 Aug 2007 09:38:35 +0800
From: "=?gb2312?B?yqmzybn7?="  <richard.shi@easyget.com.cn >
To: "=?gb2312?B?wt6+orfl?="  <luojf@ivage.com >,
"=?gb2312?B?wt5qaW5mZW5n?="  <luojf@v2tech.com >
Cc: "=?gb2312?B?t/vQy86w?="  <fuxw@v2tech.com >,
"=?gb2312?B?w+fQobq9?="  <miaoxh@v2tech.com >,
"=?gb2312?B?1cW54g==?="  <zhangguang@v2tech.com >,
"=?gb2312?B?tsW9vw==?="  <dujiao@v2tech.com >,
"=?gb2312?B?u8a8zLn6?="  <huangjg@v2tech.com >,
"=?gb2312?B?wO7Oug==?="  <leewei@v2tech.com >,
"=?gb2312?B?0e7N8sHB?="  <yangwl@v2tech.com >,
"=?gb2312?B?0+Czr7H2?="  <yucb@v2tech.com >,
"=?gb2312?B?0razztPu?="  <george.ye@easyget.com.cn >,
"=?gb2312?B?z8S6xg==?="  <summer.xia@easyget.com.cn >,
"chengguocool"  <chengguocool@163.com >
References:   <200708200929079060422@easyget.com.cn >
Subject: =?gb2312?B?VjLGvcyovLBJVkFHRca9zKjOyszi?=
Message-ID:  <200708200938350463464@easyget.com.cn >
Organization: =?gb2312?B?zsLW3dLXuN/Qxc+ivLzK9dPQz965q8u+?=
X-mailer: Foxmail 6, 4, 104, 20 [cn]
Mime-Version: 1.0
Content-Type: multipart/alternative;
boundary="=====003_Dragon201226634325_====="


This is a multi-part message in MIME format.

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charset="gb2312"
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[message truncated]

可能是你的smtp里面填入的dns有问题
或者该域名不存在

一般来说，我觉得你如果发送邮件到其它所有邮箱都正常，就一个有问题，你可以联系下对方的管理员，再结合你自己的邮件日志，共同找出问题。

Unknown user

1 检查你的服务器上有没有 v2tech 这个邮局 如果有删除掉

2 联系对方确认是否有这些用户存在，你的服务器解析他们是否正常，检查他MX记录做的是否符合规范

3 有问题时使用 163 的邮箱测试发送