> I have a pair of internet relays in a DMZ that forward for firewalled > local mail servers. MimeDefang runs virus scans on all mail and > spamassassin on inbound mail, first checking that the user(s) actually > exist on the destination host with the included > md_check_against_smtp_server > function. I don't think postfix offers that option, but I'd be > pleasantly surprised if it can. > not the RHEL4 (therefore Centos 4) one. postfix does offer this option now. > It's real unique advantage is decades-long consistency and improvement. > With the milter interface you get the ability to add any additional > processing you want in the language of your choice - and with MimeDefang > pretty much all of that is already done for you. If you are interested > in why it is a good approach, there is a very detailed description > if you follow the 'slides' link at the top of http://www.mimedefang.com. > > I'll probably wait for postfix + milter support to become stable and take the advantages of postfix over sendmail if I need the features provided by mimedefang.