I've had a a situation in the past that required this same application. I ended up using amavisd-new with custom views for incoming and outgoing mail. For spam originating from inside, it was dropped completely, for spam originating from the outside, subject was rewritten. Hope this helps. -Michael -- Michael Nicks Network Engineer KanREN e: mtnicks@kanren.net o: +1-785-856-9800 x221 m: +1-913-378-6516 Hank Nussbacher wrote:
Back in 2002 I asked if anyone had a solution to block or rate limit outgoing web based spam. Nothing came about from that thread. I have an ISP that *wants* to stop the outgoing spam on an automatic basis and be a good netizen. I would have hoped that 4 years later there would be some technical solution from some hungry startup. Perhaps I have missed it. What I have found so far is:
Detecting Outgoing Spam and Mail Bombing http://www.brettglass.com/spam/paper.html SMTP based mitigation - thing on HTTP/HTTPS
Stopping Outgoing Spam http://research.microsoft.com/~joshuago/outgoingspam-final-submit.pdf Research paper - nothing practical
Throttling Outgoing SPAM for Webmail Services http://www.ceas.cc/papers-2005/164.pdf Research paper - nothing practical
ISPs look inward to stop spam - Network World http://www.networkworld.com/news/2004/071204carrispspam.html Bottom line - no solution
So I am trying once again. Hopefully someone has some magic dust this time around.
Thanks, Hank Nussbacher http://www.interall.co.il