phpBB.com

Hey,

Ok. When people register, send any emails or anything to do with SMTP I get the following error:

Ran into problems sending Mail. Response: 451 Temporary local problem - please try later

DEBUG MODE
Line : 200
File : smtp.php

What do you guys suggest. My SMTP Server is working perfectly.

If memory serves, I believe that error means that it's an invalid email... I might be wrong though... Have you tried PHP sendmail() function? (Does not use SMTP)