Re: ISP wants to stop outgoing web based spam

[Michael Nicks <mtnicks () kanren net>]

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