郵件發不出去。不知是什麼原因？

freetalk

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: mandy.ho@phoenixintl.com.hk
: Message contains [1] file attachments

chj97j

日志不够详细，应该还有发送连接的日志，挂上来看看

freetalk

The attached message had transient non-fatal delivery errors

THIS IS A WARNING MESSAGE ONLY - YOU DO NOT NEED TO RESEND YOUR MESSAGE!

This server is configured to automatically retry delivery at configured intervals.  Subsequent attempts to deliver this message are pending.

Failed address: mandy.ho@phoenixintl.com.hk

--- Session Transcript ---
Thu 2009-06-25 21:54:12: Parsing Message <xxxxxxxxxxxxxxxxxx\pd50000010712.msg>
Thu 2009-06-25 21:54:12: From: weifeng.liao@chinese-rays.com.cn  Thu 2009-06-25 21:54:12: To: mandy.ho@phoenixintl.com.hk  Thu 2009-06-25 21:54:12: Subject: test842  Thu 2009-06-25 21:54:12: Message-ID:
Thu 2009-06-25 21:54:12: MX-record resolution of [phoenixintl.com.hk] in progress (DNS Server: 202.96.128.166)...
Thu 2009-06-25 21:54:12: P=010 D=phoenixintl.com.hk TTL=(1367) MX=[mail.phoenixintl.com.hk] {202.82.25.88}  Thu 2009-06-25 21:54:12: Attempting MX: P=010 D=phoenixintl.com.hk TTL=(1367) MX=[mail.phoenixintl.com.hk] {202.82.25.88}  Thu 2009-06-25 21:54:12: Attempting SMTP connection to [202.82.25.88 : 25]  Thu 2009-06-25 21:54:12: Waiting for socket connection...
Thu 2009-06-25 21:54:33: Winsock Error 10060 The connection timed out.
Thu 2009-06-25 21:54:33: This message is 73 minutes old; it has 0 minutes left in this queue  Thu 2009-06-25 21:54:33: Primary queue lifetime exceeded; message placed in retry queue
--- End Transcript ---
: Message contains [1] file attachments

chj97j

Thu 2009-06-25 21:54:33: Winsock Error 10060 The connection timed out.
问题就出在这里，两种可能，一种是网络问题，这个比较难以解决，一种可能是MTU值造成的，可以尝试改改MTU值，这个应该可以再网络接入的时候作调整。
另外，可以尝试加大MDAEMON中的SOCKET SESSION时间。

freetalk

我的MTU值為１５００
問題這個郵件地址以前都可以發出去，就是這周開始發不出去。