This idea is a partial solution, and should cut down on your SPAM..Perhaps, if feasible create a "dmz" email account at gmail. Pull all emails from your support@xyz.com into a gmail account, google will catch 99% of spam, the real customers and the lazy ones will get through. I think? Maybe gmail wont spam filter pop pulled emails. Worth a shot though, and that will remove your spam and assist in your SPAM score.Assuming that works, now you just have customers you want to assist [#And those that don't.