General Error
Ran into problems sending Mail. Response: 450 4.1.2 : Recipient address rejected: Domain not found
DEBUG MODE
Line : 165
File : smtp.php
Educated guess? Someone's fed the forum a bad email address, and then subscribed to a thread, so when I post, and it tries to update them on it, then I get the error.
Ignore it for the moment. It won't prevent you from posting.
Jenny.
Helplessness is a doorway to the innermost reaches of the soul.
If my corset isn't tight, it just isn't right!
Kink is the spice of life!
Come to the Dark Side - we have cookies!
Exactly as you wrote. Someone with a fake or canceled email account have clicked "Watch this topic for replies". Each time someone posts in the tread the forum software tries to send an email to the email address of the watcher. The error you saw was a failed email attempt.