I'm just using Linux and I never had any form of malware or viruses
I will not pay for M$ to cleanup there own mess

M$ just sould fix there OS so that clueless ppl don'd need a antivirus
(the viruses and malware will just disappear if it fails to work)
But then ... there is a gap for those antivirus vendors

ppl are already paying money to cleanup mess of M$
(they even pay for an OS that can run malware or viruses)

I don't drop/block anything on incomming sendmaildeamon, Then the mailscanner (with allot of plugins) checks the mail en drop it + log to quarantine + log into mysql For this moment there is no really long delay (mostly whit in 1min) The quarantine is cleanup on 7day's (I have accountants as clients and they don't like missed mails so release is possible) One's I also dit the rDNS drop but allot of customers are sending from adsl with no reverse The rblchecks are done in mailscanner (maybe to late you should think but spam mails are mostly only 3,5k and take no many cpu) As long as the mails are send whit in 5min I think not to change anything