Postfix said:554 5.7.1回信

風隨行

请帮忙, 不知为什么Postfix出现如下的回信, 但是收发给其它公司就没有问题, 只有这间公司不能发送给它, 急, 请帮忙.

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-----Original Message-----
From: Mail Delivery System [mailto:MAILER-DAEMON@test.com]
Sent: Monday, September 29, 2008 5:38 PM
To: test@test.com
Subject: Undelivered Mail Returned to Sender

This is the Postfix program at host mail.test.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 Postfix program

<user@customer.com.hk>: host mail02.customer.com.hk[220.136.253.63] said:
554
    5.7.1 This message has been blocked because the return email domain is
    invalid.(failed to obtain DNS record for domain test.com) (in reply to
    end of DATA command)

<user1@customer.com.hk>: host mail02.customer.com.hk[220.136.253.63]
said:
    554 5.7.1 This message has been blocked because the return email domain is
    invalid.(failed to obtain DNS record for domain test.com) (in reply to
    end of DATA command)

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wangbuliao213

对方要求你连过去的IP有SPF信息,找ISP做反向解析试试.

neil.fu

反解做了后还会出现退信问题的