2 messages in net.sourceforge.lists.courier-users[courier-users] Restricting email sen...
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Mark BucciarelliApr 22, 2006 6:04 pm 
ma...@intron.acApr 22, 2006 10:02 pm 
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Subject:[courier-users] Restricting email senders by IPActions...
From:Mark Bucciarelli (ma@gaiahost.coop)
Date:Apr 22, 2006 6:04:42 pm
List:net.sourceforge.lists.courier-users

Is there anyway to restrict outgoing email by IP?

We use SMTP auth, but I do not trust my users--some send spam. It is a webmail-only service, so I know the source IP of all legitimate outgoing mail.

If I can tell courier to only allow SMTP auth from a given IP, I can use a pf rdr rule + dspam SMTP proxy to deal with these bastards.

To date, I have been monitoring the mail queue, which is a primitive hack, but appears to work Ok as spammers like to send emails to invalid addresses.

Any other suggestions most welcome.

m