293090Re: block spam mail from lan
- May 11, 2013
> And the most effective countermeasure to spam originating from devicesI don't understand.
> on the LAN has nothing to do with Postfix. As most spamware in the wild
> today still attempts to send direct-to-MX, simply creating a TCP 25
> egress filter at your edge router/firewall will give the best bang for
> the buck. This simply means creating a rule to drop all outbound TCP 25
> connections except those originating from the IP of your Postfix MTA.
Situation: A real user using browser connect to squirrelmail and send a
mail. It's ok.
But if this user create a mail bomb using squirrelmail how way to spam I
can have this problem.
If a drop port 25, user can send any mail.
Or tell me what I don't understand.
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