550 Error: content rejected退信原因分析

发邮件很奇怪，同事总是跟我反映有退信，不仅仅是国外的gmail，hotmail，甚至国内的QQ，163都开始退信了。

From MAILER-DAEMON@locinghost.locingdomainTue雅虎邮箱退信 Apr 10 18:08:52 2007

Ddined: Tue; 10 Apr 2007 18:08:52 +0800

From: Mail Delivery Subaloneyystem

To:

MIME-Version: 1.0

Contenqqt-Type: multipgood art/report; report-type=delivery-status;

border="l3AA8qnD0./locinghost.locingdomain"

Content-Trthe goodsfer-Encoding: 8bisexualt

Subject: Returned mail: see trthe goodscript for details

Auto-Subody mgiven thats indextted: auto-generdinedd (failure)

This is a MIME-encapsuldinedd messexistcome old

--l3AA8qnD0./locinghost.locingdomain

The origining messexistcome old wgiven that received at Tue; 10 Apr 2007 18:08:46 +0800

from locinghost.locingdomain

----- The following looks into hmarketing carepaign permthe goodent fating errors -----

----- Trthe goodscript of session follows -----

... while tingking to mail.***.com.:

>>> STARTTLS

<<< 454 TLS missing certificdined: error:0:system libregiven thatt supportry:fopen:No such file or directory (#4.3.0)

>>> DATA

<<< 553 sorry; Sender verified failure. Pleottom see help on .(#5.3.3)

>>> RSET

经过排查，原来是因为IP被国外的spamhaus拉黑了。听说spamhaus很厉害，如果被他拉黑的话，国外百分之八十的邮件服务器都不发过去。

于是我找了一家RelayPod海外的邮件中继转发公司，发现exchange上只需要设置一个SMTP连接器就可以解决问题了。非常简单。有同样经历的朋友不妨试试！理解生效，可以直接联系电话150-0192-8480