Oh, I just had a thought too.
XP SP2 kb 885250 fubars the snap servers - you need to apply the Snap upgrade to fix.
"Description:
SnapOS 4.0.860 upgrade patch that resolve issues introduced by Microsoft KB885250 and issues with SMTP setting in SnapOS 4.0.084 and 4.0.085."
http://adaptec-tic.adaptec.com/cgi-b...i=&p_topview=1
Nick