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Possible Duplicate:
Best Practices for preventing you from looking like a spammer

I use Exim4 as MTA on Ubuntu server. The problem is that all outgoing emails are being flagged as spam by google mail. It is very annoying. I appreciate your hints and possible solutions.

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marked as duplicate by jscott, Shane Madden, Ward, womble, MDMarra Nov 14 '11 at 2:40

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2 Answers 2

up vote 1 down vote accepted

One thing to look at is there being a valid reverse name for your mail server. If your mail server is "mail.mycompany.com" yet when resolved, has a different name, some servers, like mine, will reject your email. Another thing to verify is your mail server having an SPF record. Little more information may help resolve this.

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I addes SPF record to my DNS records, but it had not effect. HOw can I check the reverse name of the mail server? –  alfish Aug 3 '11 at 2:57
Using mxtoolbox.com, I figured out that my IP has been blocked by two spam blacklists. –  alfish Aug 9 '11 at 23:29

there are too many factors. Your server have been send email out too many people and someone probably report your email as a spam email. I would rename the send email to something and send the email on the different email server with a different ip address.

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Well, at least this is not the case. In fact this occured on a fresh install of the server. –  alfish Aug 3 '11 at 0:06

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