On Wed, Dec 06, 2006 at 11:32:57AM -0800, John Rudd wrote: > Botnet looks to verify that: > > a) the relay has a PTR record at all > b) optional: the hostname in the PTR record resolves, and resolves back > to the IP address that you're talking to > c) the hostname doesn't contain 2 or more octets of its IP address in > hex or decimal form > d) the hostname doesn't contain certain "client like" keywords (dsl, > dynamic, dialup, etc.) > e) (in Botnet, but not in my mimedefang version) will exempt c & d if > the hostname does contain certain "sever like" keywords.
I might test your Botnet plugin, but I'd make a few additional exemptions that were suggested on the spamtools mailinglist. If either the HELO or the envelope sender domain points back at the sending IP, it is also allowed. Unless, of course, either of those are generic rDNS or [] bracketed IP constructs. The idea is that SMEs on crappy DSL lines that do not allow you to change reverse DNS, but that do operate their own domain, properly pointing back to their own mailserver on their DSL line, are allowed through. I'll even patch that myself if I can find a round tuit, and install it for my test-userbase. -- Jan-Pieter Cornet <[EMAIL PROTECTED]> !! Disclamer: The addressee of this email is not the intended recipient. !! !! This is only a test of the echelon and data retention systems. Please !! !! archive this message indefinitely to allow verification of the logs. !! _______________________________________________ NOTE: If there is a disclaimer or other legal boilerplate in the above message, it is NULL AND VOID. You may ignore it. Visit http://www.mimedefang.org and http://www.roaringpenguin.com MIMEDefang mailing list [email protected] http://lists.roaringpenguin.com/mailman/listinfo/mimedefang
