----- Original Message -----
From: "Wietse Venema" <wie...@porcupine.org>
To: "Postfix users" <postfix-users@postfix.org>
Sent: Wednesday, November 28, 2012 9:11 AM
Subject: Re: Need help blocking spam by IP address owner
vi...@vheuser.com:
I am receiving spam from ever changing client IP addresses. Each spam
has
other tiny variations that prevent string matching. The one thing they
all
have in common is the owner of the IP addresses. Is there any way to do
lookup of the client IP owner at Prescreen or SMTP time to REJECT the
incoming connection? Is this a workable solution? I've searched the
web,
the documentation and archives. No luck. Does anyone have a solution or
script? Thanks!
Find or build a policy daemon, milter, or content filter that queries
the whois service, I suggest using a local cache to speed up lookup
latency.
http://www.postfix.org/SMTPD_POLICY_README.html
http://www.postfix.org/MILTER_README.html
http://www.postfix.org/FILTER_README.html
Wietse
Thanks, Wietse. To write something is above my skills at this point, I
think.
I've already read each of those 3 docs and tried few things.
I was hoping someone has something similar already set up.
I'm better at modifying code than writing it...
Anyone have anything similar?
Vince
