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how to restrict systems/users to use sendmail server?

Posted on 2008-10-26
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Last Modified: 2013-12-18
Is there any other way to restrict users/systems/domains/IPs to use sendmail server except listed in /etc/access(.db)?
I just want to secure sendmail server so that none of the other system can send mails/messages/spams from sendmail server except we have mentioned the IPs of LAN systems in /etc/access.db.

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Question by:samengr
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by:ltxda
ID: 22808022
You can configure Sendmail to utilize authentication and not relay unless a user has been authenticated.  Check the relaying configuration portions of the docs and also AUTH.  
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ltxda earned 375 total points
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Here is another, more advanced configutation how-to's:

http://www.sendmail.org/m4/anti_spam.html

http://ultra.ap.krakow.pl/~raj/sendmail/english.html    <-  I think this one is more what you're looking for if you don't want to settle for just SMTP Auth.

Hope this helps!

LTxda

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