karlyang88
qmail邮件系统发往我们公司的邮件总是退信
[size=3][size=5]各位高手，3月份我们公司实施了f5的3DNS；之后有用户反映总是收不到某些客户的邮件。
通过拿到客户的退信，分析后，发现这部分客户使用的都是qmail邮件系统。[/size][/size]
退信的内容如下：
From: [email]MAILER-DAEMON@domains1.wayout.net[/email]
[mailto:MAILER-[email]DAEMON@domains1.wayout.net[/email]]
Sent: Tuesday, June 10, 2008 10:15 AM
To: [email]rowida.tahtawy@elabdgroup.com[/email]
Subject: failure notice
Hi. This is the qmail-send program at domains1.wayout.net.
I'm afraid I wasn't able to deliver your message to the following addresses.
This is a permanent error; I've given up. Sorry it didn't work out.
<lewis_zeng@**.com.cn>:
CNAME lookup failed temporarily. (#4.4.3)
I'm not going to try again; this message has been in the queue too long.
到现在为止，有将近10家客户都是这样的退信。
请问，有没有对qmail比较熟悉的兄弟，帮忙解释下原因。
我们的smtp服务器没有配置cname。