Thread:Project:Support desk/Watchlist not sending emails/reply (3)

You could try to enable the debug log as explained in Manual:How to debug, and perform an action that should trigger the email, then see the debug log to any message related to the email function.

You could also check the Manual:Job queue to see how many jobs are on the table. I don't remember if email notifications are handled by the job queue, but if they are and there's some problem on it, it could be also the problem.