Our YAF deployment isn't sending notifications any longer. I have ran double checked the setup using the /install folder and have confirmed the settings work. However, if you go to the Admin site and attempt to send messages, none ever go out. I also don't see any errors on the Error log. Does anyone have any ideas as to what may be causing the issue or what to check?

Correction.

Mail does work if you go to either the Admin section and send an email to a group or if you choose to send an email to a member regarding a topic.

However, the notification to Forum Administrators or watch topics do not appear to be working.