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Old 03-01-2006, 06:03 PM   #1
Cottsay
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Question SMTP Authentication


I'm running Fedora 4 with Postfix as my default mail handler, and Dovecot as my IMAP/IMAPS server. Every so often I get spam appearing to come from my own server. I believe that this is a result of not having SMTP Authentication required for use of the SMTP server. Is there a way that I can secure my SMTP server?
 
Old 03-01-2006, 06:50 PM   #2
gilead
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Using SMTP AUTH is for allowing users who correctly identify themselves by the auth mechanism to relay mail. It won't protect you against spam, but if this is what you want to do, it's worth having a look at http://www.sendmail.org/~ca/email/auth.html and there's a very good howto here at http://www.linuxquestions.org/questi...d.php?t=224543
 
Old 03-01-2006, 06:51 PM   #3
Cottsay
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I wasn't asking for that, badly phrased question, i'll check it out, thanks....
 
Old 03-01-2006, 06:58 PM   #4
Cottsay
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Alright, this is sorta what I found before, but when I do a telnet, it returns POSTFIX, as it is my default mail handler. Is sendmail still running somewhere, or does postfix do everything now. Thanks for pointing me in the right direction...
 
Old 03-01-2006, 07:27 PM   #5
gilead
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Postfix can do SMTP AUTH (http://postfix.state-of-mind.de/patr...tter/smtpauth/ and http://www.postfix.org/SASL_README.html have some info on this). For spam filtering, there is also http://www.advosys.ca/papers/postfix-filtering.html, http://www.thoron.iki.fi/postfix/pos...m-filter.shtml and http://www.spamfighter.com/Server_Sp...er_Postfix.asp.

Sorry to just throw links at you, but I use sendmail so I didn't have a basis for comparison. Those sites were the results of a quick google. The last one produced a giggle after the google - spamfighter is a certified microsoft partner...
 
Old 03-01-2006, 09:07 PM   #6
Cottsay
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I'll take a look...thanks much!
 
  


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