退信内容
----- Original Message -----
From: "Corp Email US" <Mail Service@us.biz-email.net>
To: <daisyzhang@jxsilk.cn>
Sent: Wednesday, February 20, 2008 3:47 PM
Subject: Returned mail: permanent problems with the remote server

> The original message was received at Wed, 20 Feb 2008 15:47:57 +0800
>
>   ----- The following addresses had permanent fatal errors -----
> <haidong@ostarsilk.com>
> <jianqiu@ostarsilk.com>
>
>   ----- Transcript of session follows -----
> 554 permanent problems with the remote server mail.ostarsilk.com
退信附件内容：
Reporting-MTA: DNS; us.biz-email.net
Arrival-Date: Wed, 20 Feb 2008 09:39:18 +0800
Original-Recipient: RFC822; <haidong@ostarsilk.com>,<[email=jianqiu@ostarsilk.com]jianqiu@ostarsilk.com[/email]>
Final-Recipient: RFC822; <haidong@ostarsilk.com>,<[email=jianqiu@ostarsilk.com]jianqiu@ostarsilk.com[/email]>
Action: failed
Remote-MTA: DNS; mail.ostarsilk.com
Last-Attempt-Date: Wed, 20 Feb 2008 15:47:57 +0800


另外一封邮件也有退信
退信内容：
----- Original Message -----
From: "Corp Email US" <Mail Service@us.biz-email.net>
To: <daisyzhang@jxsilk.cn>
Sent: Tuesday, February 19, 2008 5:29 PM
Subject: Returned mail: could not connect and send the mail to mail.vincentdunn.com

> The original message was received at Tue, 19 Feb 2008 17:29:20 +0800
>
>   ----- The following addresses had permanent fatal errors -----
> <Emiliatownsmen@vincentdunn.com>
>
>   ----- Transcript of session follows -----
> 554 could not connect and send the mail to mail.vincentdunn.com
退信附件内容：
Reporting-MTA: DNS; us.biz-email.net
Arrival-Date: Tue, 19 Feb 2008 09:55:44 +0800
Original-Recipient: RFC822; <Emiliatownsmen@vincentdunn.com>
Final-Recipient: RFC822; <Emiliatownsmen@vincentdunn.com>
Action: failed
Remote-MTA: DNS; mail.vincentdunn.com
Last-Attempt-Date: Tue, 19 Feb 2008 17:29:20 +0800

是什么原因呢？

好像都是无法解析对方邮件服务器DNS造成的么？可是通过我们公司自己的邮件服务器发不通，通过转发服务器也法不通，会不会是对方服务器设置的问题呢？但是这种情况发生了几次了，让我有点困惑，可不可能是我们公司邮件服务器上设置出了什么问题》

首先，俺不是高手。
俺觉得核心是下面两个问题
554 permanent problems with the remote server mail.ostarsilk.com
554 could not connect and send the mail to mail.vincentdunn.com

具体问题要看服务器的smtp投递报告

上面一封的原因，通过查看日志，我自己已经找到了，是对方邮件服务器设置了接受的邮件最大只有5M，我们发过去的邮件超过限制造成的...
       这是下面那封退信的日志文件：
ue 2008-02-19 09:11:48: Session 4313; child 2
Tue 2008-02-19 09:11:25: Parsing Message <d:\mdaemon\queues\remote\pd35000255249.msg>
Tue 2008-02-19 09:11:25: From: daisyzhang@jxsilk.cn
Tue 2008-02-19 09:11:25: To: Emiliatownsmen@vincentdunn.com
Tue 2008-02-19 09:11:25: Subject: Re: Audrey
Tue 2008-02-19 09:11:25: Message-ID: <[email=007701c87294$54e996a0$970aa8c0@jxsilk.cn]007701c87294$54e996a0$970aa8c0@jxsilk.cn[/email]>
Tue 2008-02-19 09:11:25: MX-record resolution of [vincentdunn.com] in progress (DNS Server: 220.189.127.108)...
Tue 2008-02-19 09:11:26: *  P=010 D=vincentdunn.com TTL=(1440) MX=[mail.vincentdunn.com] {69.94.121.241}
Tue 2008-02-19 09:11:26: Attempting MX: P=010 D=vincentdunn.com TTL=(1440) MX=[mail.vincentdunn.com] {69.94.121.241}
Tue 2008-02-19 09:11:26: Attempting SMTP connection to [69.94.121.241 : 25]
Tue 2008-02-19 09:11:26: Waiting for socket connection...
Tue 2008-02-19 09:11:41: Winsock Error 10060 The connection timed out.
Tue 2008-02-19 09:11:41: Attempting to send message to gateway.
Tue 2008-02-19 09:11:41: Attempting SMTP connection to [cnc.corp-email.com : 25]
Tue 2008-02-19 09:11:41: A-record resolution of [cnc.corp-email.com] in progress (DNS Server: 220.189.127.108)...
Tue 2008-02-19 09:11:41: D=cnc.corp-email.com TTL=(10) A=[210.51.23.8]
Tue 2008-02-19 09:11:41: Attempting SMTP connection to [210.51.23.8 : 25]
Tue 2008-02-19 09:11:41: Waiting for socket connection...
Tue 2008-02-19 09:11:41: Socket connection established (192.168.13.3 : 2685 -> 210.51.23.8 : 25)
Tue 2008-02-19 09:11:41: Waiting for protocol initiation...
Tue 2008-02-19 09:11:46: <-- 220 cnc2.biz-email.net ESMTP Antispam; Tue, 19 Feb 2008 09:09:33 +0800
Tue 2008-02-19 09:11:46: --> EHLO jxsilk.cn
Tue 2008-02-19 09:11:46: <-- 250-cnc2.biz-email.net Hello jxsilk.cn [220.189.249.211], pleased to meet you.
Tue 2008-02-19 09:11:46: <-- 250-ENHANCEDSTATUSCODES
Tue 2008-02-19 09:11:46: <-- 250-SIZE 31457280
Tue 2008-02-19 09:11:46: <-- 250-EXPN
Tue 2008-02-19 09:11:46: <-- 250-ETRN
Tue 2008-02-19 09:11:46: <-- 250-ATRN
Tue 2008-02-19 09:11:46: <-- 250-DSN
Tue 2008-02-19 09:11:46: <-- 250-CHECKPOINT
Tue 2008-02-19 09:11:46: <-- 250-8BITMIME
Tue 2008-02-19 09:11:46: <-- 250-AUTH CRAM-MD5 PLAIN LOGIN DIGEST-MD5
Tue 2008-02-19 09:11:46: <-- 250-STARTTLS
Tue 2008-02-19 09:11:46: <-- 250 HELP
Tue 2008-02-19 09:11:46: --> AUTH CRAM-MD5
Tue 2008-02-19 09:11:46: <-- 334 PDIwMDgwMjE5MDkwOTI4QGNuYzIuYml6LWVtYWlsLm5ldD4=
Tue 2008-02-19 09:11:46: --> anhzaWxrIDgwNWNhMjllNjViYzI3NTNhMjY5Y2RjNmVhMDc0Mzdk
Tue 2008-02-19 09:11:47: <-- 235 2.0.0 Authentication successful
Tue 2008-02-19 09:11:47: --> MAIL From:<daisyzhang@jxsilk.cn> SIZE=4167
Tue 2008-02-19 09:11:47: <-- 250 2.1.0 <daisyzhang@jxsilk.cn>... Sender ok
Tue 2008-02-19 09:11:47: --> RCPT To:<Emiliatownsmen@vincentdunn.com>
Tue 2008-02-19 09:11:47: <-- 250 2.1.5 <Emiliatownsmen@vincentdunn.com>... Recipient ok; will forward
Tue 2008-02-19 09:11:47: --> DATA
Tue 2008-02-19 09:11:47: <-- 354 Enter mail, end with "." on a line by itself
Tue 2008-02-19 09:11:47: Sending <d:\mdaemon\queues\remote\pd35000255249.msg> to [210.51.23.8]
Tue 2008-02-19 09:11:47: Transfer Complete.
Tue 2008-02-19 09:11:48: <-- 250 2.6.0 4167 bytes received in 00:00:00; Message id ZDC40634 accepted for delivery
Tue 2008-02-19 09:11:48: --> QUIT
Tue 2008-02-19 09:11:48: <-- 221 2.0.0 cnc2.biz-email.net closing connection
Tue 2008-02-19 09:11:48: SMTP session successful (Bytes in/out: 728/4355)

这个我就不明白了，看上去的话，应该是已经通过转发服务器发送成功了的...但是怎么还会产生退信呢？

后面表示投递成功，
俺猜的，
mail.vincentdunn.com有两个节点，总部69.94.121.241，国内分部210.51.23.8，错误在
Tue 2008-02-19 09:11:41: Winsock Error 10060 The connection timed out.

Tue 2008-02-19 09:11:41: Winsock Error 10060 The connection timed out.

连接超时,检查线路质量

还有一个看起来是你的域名有问题