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What are the best practices to configure a mail server to have your mail recognized as legitimate non spam messages? Is it to use Domain Keys, Sender ID, Sender Policy Framework, some or all 3 of these together?

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3 Answers 3

up vote 6 down vote accepted

There are a few similar mail related questions on SF already, however I'll answer this one as best I can. To avoid being recognised as spam, check:

I have never required Sender ID, although as it's a Microsoft protocol I'd assume it's more important for Exchange/Live based mail - I have never had problems in this department without implementing Sender ID.

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This was exactly the type of answer I was looking for, thanks Andy! –  Chris Marisic Oct 8 '09 at 21:36
    
Very nice answer indeed! Thanks! –  blank3 Dec 1 '09 at 16:21

I've found that disabling open SMTP relay, and having valid reverse DNS entries, is a good starting point.

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Also don't send spam through it. :)

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