Hi Brian,
We can't solve this yet. As Christoph_Kessler said, we think that the best way to solve it's to code a piece of software in-house. We try to find some software online, but we can't (there is a lot of programs to read syslogs but not emails)
I think, that in a month (approximately) we are going to start with this. When we solve the problem, i'm going to publish the solution
My apologies for not help you now.
Regards
Cristian