selling a client on SA

[Thomas Bolioli]

I have a client who is vacillating between SA and some commercial 
products. Most of the commercial products are not as accurate as SA but 
my client has some valid points. I have limited experience setting up SA 
(always plain vanilla installs through RH and single user systems) and I 
wanted to get some feedback on what is possible/feasible from the list. 
It would be used in a multi mail server env where all external mail 
would be routed through it for checks and modified headers, subjects 
would tag spam.
The issues are:
1) Does SA auto upgrade to newer versions (of the spam defs more 
importantly) or could it be set up to do so through an automated CPAN 
install?
2) Can individual users easily have their own training files (I know it 
is possible, looking more for feasibility) when they do not have an 
account on the system. ie; their training file could be located via the 
addressed email. If so,  is there anything out there to manage that? If 
not would it be possible to write a mail handler to parse the mail 
addressed to a [EMAIL PROTECTED] mail box that users could forward spam to? This 
script could then use the from line to determine which user to train on.
3) What other issues will I run into in a multi user environment where 
the SA server is simply forwarding on mail between MTAs and not the 
final delivery agent?

Thanks in advance,
Tom