Slightly OT. To get 'control' of what my MX does at SMTP time I installed a simple SMTP daemon called 'Mail Avenger', which acts as a front end to my spamassassin and postfix. It's scripting capabilties allow for such interesting things as tracking the volume of mail sent by any one IP over a given time period. Stuff like that. Primarily designed for use as an MX, but no reason it couldn't help monitor/limit outgoing mail....
http://www.mailavenger.org - C On Tue, 16 Feb 2010, Alexandre Chapellon wrote:
I have a quite buggy customer network, full of zombie PCs that spends all days sending spam and wasting the whole "reputation" of my networks. As a result it sometimes become quite hard to delivers queues for specific domains such as Yahoo!'s hosted ones. Indeed they have some temp fail (blacklist) mechanism that forbid my servers to send messages to them during hours. Taht's why I would like to setup some ougoing filtering to avoid sending too much spam through my mail relays. I think SA can help me in doing so, but I know too it's not really intented to work this way. I guess SA expects to work on MX hosts more than on smtp relays. My prerequisites are mainly: - STOP as much spam as possible at SMTP time (before queuing) - Have NO (or very few) false positives cause I could not manage telling thousands of users that they should *always_have_a_subject*, *shouldn't_write_the_subject_in_CAPS* or anything else. Further more I can't rely on RBL because a lot of my dyn IP address are regularily listed on different blacklist. Does anyone have already setup something like that and what specific config/tools/plugin could be usefull for me. If some one already done it.... does he/she have any statistics about the efficiency of this setup. Best regards.
