zero-hour e-mail antivirus solutions

[Matt Miller <madmillerx () gmail com>]

Hello folks.

I'm in the process of choosing an e-mail anti-virus gateway which has 
some kind of outbreak detection features that can protect me during 
zero-hour, before the signatures are released. Currently, it seems that 
IronPort and CommTouch are the main players in this area. I was 
wondering, what are your experiences with these zero-hour AV systems. As 
I understand, CommTouch is more of a statistical analyzer, while 
IronPort has a 24x7 team of analysts constantly monitoring the 
SenderBase network.

Anyone using one of these systems? Any comments?

Thanks in advance.
Matt