Hello, In the past 4 years we have tried using both Postfix and Qmail, several different virtual-domain packages, and spam assassin. We handle many different domains for our customers so virtual domain support is an absolute requirement, this goes for the pop3 side as well as the MTA side. Recently we have had to shut spam assassin off of our qmail server because it was running the load average so high that it was ceasing to function properly. So what I'm looking for is opinions on what the best combination of packages is that will provide at least the following functionality without running our mid-range hardware to the ground. I'm willing to consider anything, even commercial options. 1. Virtual domain support (have to be able to email users of the same user name at many different domains, i.e. john@abc.com, john@123.com, john at def.com, etc). 2. Anti-spam software. This needs to be somethign effiecient - python and perl-based options that grind business to a halt are not good. 3. pop3 access Other highly-desireable features that aren't absolutely required: Some good way to provide smtp for dynamic clients - pop-before-smtp or smtp authentication - cannot be IP based. Thanks -- ---------------------------------------------------- Jonathan Wilson Cedar Creek Software http://www.cedarcreeksoftware.com