On Monday 09 August 2004 02:11 am, Martijn Lievaart wrote:
> BTW, for a tarpit to be really effective, it should set the tcp-window
> to zero and occasionally send an ack. Not sure if one can do this from
> userspace and certainly not portable. It would be fun if courier
> implemented this though.

OpenBSD's spamd (http://www.benzedrine.cx/relaydb.html, 
http://www.openbsd.org/cgi-bin/man.cgi?query=spamd) may do what you're 
looking for.  They also have added a "greylisting" feature that I've found 
kills most worm-based emails (since they don't bother retrying).


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