Anyone out there know how to stop this. I have a PSA 7.1 system. We are getting mail @ a rate of 2.4 mililion (yes million per hour) I've used IP tables ot block IP's however we are also blocking valid people, which makes a whole nother set of problems. I've asked plesk for help and I get the standard , up grade mantra, but they fail to recognize that it takes better than 12 hours for our server to upgrade and JUST upgraded to 7.1 at the beginning of december. I don't know what to do but any much longer we might as well commit me to the mental hospital . Please help...any body please.