mdeamon服务器，总是被退信Permanent Delivery Failure

最近公司同事发邮件经常有被退信。高手帮忙分析下，给个建议
The attached message had PERMANENT fatal delivery errors!

After one or more unsuccessful delivery attempts the attached message has been removed from the mail queue on this server.  The number and frequency of delivery attempts are determined by local configuration parameters.

YOUR MESSAGE WAS NOT DELIVERED TO ONE OR MORE RECIPIENTS!

Failed address: [email protected]

--- Session Transcript ---
Thu 2010-08-26 18:30:35: [9155:1] Parsing Message <xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx\pd90000003179.msg>
Thu 2010-08-26 18:30:35: [9155:1] From: [email protected]  Thu 2010-08-26 18:30:35: [9155:1] To: [email protected]  Thu 2010-08-26 18:30:35: [9155:1] Subject: =?gb2312?B?zajWqg==?=  Thu 2010-08-26 18:30:35: [9155:1] Message-ID: <E9C0520970D248BDB61D78F3A58FAECE@9205cfd3cb344e5>
Thu 2010-08-26 18:30:35: [9155:1] MX-record resolution of [jadecap.net] in progress (DNS Server: 203.196.0.6)...
Thu 2010-08-26 18:30:35: [9155:1] *  P=020 S=001 D=jadecap.net TTL=(20) MX=[mx1.biz.mail.yahoo.com] {74.6.140.31}  Thu 2010-08-26 18:30:35: [9155:1] *  P=020 S=002 D=jadecap.net TTL=(20) MX=[mx1.biz.mail.yahoo.com] {68.142.202.129} multi-homed  Thu 2010-08-26 18:30:35: [9155:1] *  P=030 S=000 D=jadecap.net TTL=(20) MX=[mx5.biz.mail.yahoo.com] {68.142.202.129}  Thu 2010-08-26 18:30:35: [9155:1] *  P=030 S=003 D=jadecap.net TTL=(20) MX=[mx5.biz.mail.yahoo.com] {74.6.140.31} multi-homed  Thu 2010-08-26 18:30:35: [9155:1] Attempting MX: P=020 S=001 D=jadecap.net TTL=(20) MX=[mx1.biz.mail.yahoo.com] {74.6.140.31}  Thu 2010-08-26 18:30:35: [9155:1] Attempting SMTP connection to [74.6.140.31 : 25]  Thu 2010-08-26 18:30:35: [9155:1] Waiting for connection...
Thu 2010-08-26 18:30:38: [9155:1] Connection established (59.151.61.244 : 3322 -> 74.6.140.31 : 25)  Thu 2010-08-26 18:30:38: [9155:1] Waiting for protocol initiation...
Thu 2010-08-26 18:30:42: [9155:1] <-- 220 mta1022.biz.mail.sk1.yahoo.com ESMTP YSmtp service ready  Thu 2010-08-26 18:30:42: [9155:1] --> EHLO crfchina.com  Thu 2010-08-26 18:30:42: [9155:1] <-- 250-mta1022.biz.mail.sk1.yahoo.com
Thu 2010-08-26 18:30:42: [9155:1] <-- 250-8BITMIME  Thu 2010-08-26 18:30:42: [9155:1] <-- 250-SIZE 41943040  Thu 2010-08-26 18:30:42: [9155:1] <-- 250 PIPELINING  Thu 2010-08-26 18:30:42: [9155:1] --> MAIL From:<[email protected]> SIZE=4984  Thu 2010-08-26 18:30:52: [9155:1] <-- 250 sender <[email protected]> ok  Thu 2010-08-26 18:30:52: [9155:1] --> RCPT To:<[email protected]>  Thu 2010-08-26 18:30:52: [9155:1] <-- 250 recipient <[email protected]> ok  Thu 2010-08-26 18:30:52: [9155:1] --> DATA  Thu 2010-08-26 18:30:55: [9155:1] <-- 354 go ahead  Thu 2010-08-26 18:30:55: [9155:1] Sending <xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx\pd90000003179.msg> to [74.6.140.31]  Thu 2010-08-26 18:30:55: [9155:1] Transfer Complete.
Thu 2010-08-26 18:32:51: [9155:1] Connection timed out!
Thu 2010-08-26 18:32:51: [9155:1] This message is 0 days old; it has 0 days left to get delivered
--- End Transcript ---
: Message contains [1] file attachments

投递永久性的失败 1.收件人的地址错误 2.收件人的邮件服务器限制， 从上边的描述看：是连接超时 楼主应当检查一下邮件地址的正确性哦  比如在 CMD下 试试：telnet  jadecap.net 25  观察连接的情况！