肖建彬的博客

作者: 肖建彬 | 可以转载, 转载时务必以超链接形式标明文章原始出处和作者信息及版权声明
网址：http://www.xiaojb.com/archives/mailtech/sina_mta_postfix.shtml

之前绝对是qmail，目前是postfix了,不知道是外边包了反垃圾的引擎，还是整体都换了，有时间了进一步了解一下。

[root@nanu root]# telnet sinamx.sina.com.cn 25
Trying 202.108.3.186...
Connected to mail3-186.sinamail.sina.com.cn (202.108.3.186).
Escape character is '^]'.
220 mx3-11.sinamail.sina.com.cn ESMTP Postfix (Postfix Rules!)
quit
221 2.0.0 Bye
Connection closed by foreign host.

补：发了一封测试信，发现是包了基于postfix的反垃圾引擎。

Received: (qmail 29395 invoked by uid 99); 3 Apr 2006 02:09:28 -0000
Message-ID:
From:
To: xxxxx@discuz.com
Subject: sdfasfasfasf
MIME-Version: 1.0
Date: Mon, 03 Apr 2006 10:09:28 +0800
X-Mailer: SinaMail 3.0Beta (FireToad)
X-Priority: 3

补：随后发现了我们的邮件系统不能发送邮件到新浪，是ptr引起的