I've been going nuts trying to stop all of the spam that slips through plesk/qmail. I'm using all of the features in plesk.. black hole lists, spam assassin, rejecting invalid recipients.. etc. My clients send me mail constantly where the spammer sends it 'from' a known good address of the client to another known good addresses at the client. 1) how to I stop outside MTA's from sending mail 'from' the domain it's sending to? 2) I tried setting up qmail-scanner but get qq temporarily unavailable errors when trying to send mail. In the past with other MTA's I've used procmail to do things.. is that possible? I feel like my hands are tied since it's already a hacked version of qmail and recompling with other options would likely break it. Is SWsoft working on this issue?