> And qmail doesn't do IPv6, which will kill it as soon as IPv6 becomes > popular (which, last time I checked, was scheduled to occur in 2112, > only 101 short years from now). Does postfix? > > John Postfix 2.2 introduces support for the IPv6 (IP version 6) protocol. IPv6 support for older Postfix versions was available as an add-on patch. Though RedHat 5.x is not in the supported list. http://www.postfix.org/IPV6_README.html#compat And yes Qmail does use Perl scripts for managing spam assassin daemon. Thanks John > Simply ensuring reverse DNS to a valid domain on HELO cuts the spam > load considerably. I will implement reverse DNS lookups thank you. I did find a good security article for Postfix. http://www.symantec.com/connect/articles/filtering-e-mail-postfix-and-procmail-part-one It looks like I will be using Postfix as per recommendation, and the fact that it comes standard on RedRat. Yaron has a very convincing story about the woes of Qmail. With colored commentary and a high emphasis on THOUSANDS! That really made me chuckle THOUSANDS! Thanks man. I am not sure Qmail skills are widely appreacted as Postfix. I have dug in a little into Qmail. I think Postfix would be a better place to start for me. Thank you all for you sage advice. ,Ron