Hey,

For some reason I have one user who has signed up to be notified of private messages, and replies to topics etc. via email.  However, whenever the board sends him emails, the emails bounce, even though I know the email address he has given is still a valid one.  I only know for a fact that this is happening to one person, however I have had some other email addresses bouncing, so it could be happening to others.  Anyways if anyone knows why this is happening or how to fix it I would really appreciate the help.  Thanks!