I should suggest looking at postgrey.
Back many years ago (in a previous life/job) I sent up 6 or so MX
servers (forwarders) for a small ISP. Once I got postgrey installed and
running I saw 90%+ drop in SPAM to just my email address.
YMMV,
Rod
--
On 11/15/18 10:47 AM, Michael Christopher Robinson wrote:
Looking at the spam I get, it doesn't take long to notice that the from
address is probably forged. I've studied Address Verification by
looking at the howto on how to set it up. I'm concerned that postfix
has to make assumptions for address verification to even work and that
these assumptions won't hold true. Is there another approach to start
blocking unknown sender domains such as recording the ip address of
every client to the smtp port and keeping track of the ip's that spam
so that they can be slowed down or blocked for a while?
Maybe a better approach is to record the IP of every incoming email
that is NOT spam to create a whitelist.
I'm wondering if Address Verification is safe to deploy in production
and if not what to do instead?
-- Michael C. Robinson
_______________________________________________
PLUG mailing list
[email protected]
http://lists.pdxlinux.org/mailman/listinfo/plug
_______________________________________________
PLUG mailing list
[email protected]
http://lists.pdxlinux.org/mailman/listinfo/plug
