I set up my GMS to send notifications, and I have not seen any so far,
and we've had quite a few alerts show up, misc ones for 'lots of syncs'
from Groupwise, etc etc.

Are those that get sent out via email? If they are, what's causing
them to not show up? I have my gwia address on port 25 set as the SMTP
address, and there is no authentication required.