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Email Server Blocks at various websites

Hello,

Apparently somone on my network has a email worm virus, and has got me on some ban lists. I am trying to find the infected computer, but have not been able to yet, but I blocked access to port 25 from everyone in my network except the mail server.

I recieved this error when I tried to send out an email to a hotmail user.
550 Command rejected for policy reasons. For troubleshooting information, go to http://postmaster.msn.com

How do I fix the issue to send out to hotmail users again?

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kgreeneit

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jimmymcp02

That happend to us but it was not a virus...we were sending mass emails and we forgot an unsuscribe link and we were banned from hotmail, yahoo and aol we had to comply with their policies. also it looks like something was wrong with our dns settings. also check that your exchange was not use for NDR spam
http://www.amset.info/exchange/spam-cleanup.asp

Tony-Freeman

Hotmail now have new policies on accepting mail from mail servers.

They will not accept mail from a mail server that does not have a SPA record in their DNS.
Check that your DNS for your domain contains a TXT entry with SPA information.

Tom_Hickerson

ASKER

what is spa and do I do that with my registar?

Tony-Freeman

sorry ... my typo .... I meant SPF.
This is a DNS entry for your domain name.

If your mail server was mail.yourdomain.com
then a typical entry would be
mail TXT v=spf1 mx ptr ?all

Tom_Hickerson

ASKER

where do I add/edit this info at?

neomage23

You would add it like this...

http://www.michaelbrumm.com/spfwindowsdns/

-neo

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Kyanar

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