Les Mikesell wrote: > One of the domains I handle has been getting about 50,000 messages > a day to invalid addresses in what appears to be a distributed > dictionary attack for the last several years. What qmail did with > them was no fun at all.
I've got to say, the most effective qpsmtpd plugin I run is my own check_validrcptto_cdb plugin which uses one of John SImpson's scripts to generate a cdb of valid addreses and checks the incoming rcptto addres against it. I find it rejects *loads* of spam. Details here: http://robinbowes.com/projects/check_validrcptto_cdb R.
