==== 必填信息。没有填写将不予回复 ====
- iRedMail 版本号：0.8.5
- 使用哪个数据库存储用户帐号（OpenLDAP，MySQL，PostgreSQL）：OpenLDAP
- 使用的 Linux/BSD 发行版名称及版本号：centos 6.3
- 与您的问题相关的日志信息：
====

发送国外邮件全部返回一封这样的邮件，包括给国内企业版163用户发送也同样有提示，根据163企业的回复是被当做垃圾邮件了，但是我查询所有的反垃圾联盟都没有我家的信息，我如何来操作解决这问题。做IP反向解析吗？

Subject: Undelivered Mail Returned to Sender

This is the mail system at host mail.longg.com.

I'm sorry to have to inform you that your message could not
be delivered to one or more recipients. It's attached below.

For further assistance, please send mail to postmaster.

If you do so, please include this problem report. You can
delete your own text from the attached returned message.

                   The mail system

<etabi-staff@pows.co.jp>: host pows.co.jp[219.95.219.53]
    said: 550 5.7.1 <e-ticket@longg.com>... Command rejected (in reply to
    MAIL FROM command)