Yahoo flagging mail as spam when using relay server

Posted by modulaaron on Server Fault See other posts from Server Fault or by modulaaron
Published on 2010-05-25T23:52:01Z Indexed on 2012/06/16 3:18 UTC
Read the original article Hit count: 660

Filed under:

postfix

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spam

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spf

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domainkeys

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yahoo

I'm using Postfix to relay mail from my site to my mail server. Mail is received properly at my Gmail and Hotmail accounts - only Yahoo is the problem. The Yahoo mail headers state:

Received-SPF: none (mta1133.mail.mud.yahoo.com: domain of [email protected] does not designate permitted sender hosts)

In contrast, the Gmail headers state:

Received-SPF: pass (google.com: domain of [email protected] designates 74.50.xxx.xxx as permitted sender) client-ip=74.50.xxx.xxx;

Reverse DNS is set up correctly, as is my SPF record and domainkeys/dkim (both domainkeys and dkim show pass(ok) in the Yahoo mail headers).

Does anyone have any suggestions as to what I can do to solve the Yahoo problem (short of contacting Yahoo, as this is a brand new mail server)?

Thanks

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