I have been setting up password notifier, sending out a few test emails, all working fine. The email send out came from  noreply@adselfserviceplus.com

I went to change to a internal email, to avoid confusion from out users. Problem no matter what email I enter, I am meet with an error when testing that email "Username and Password not accepted by the mail server"

Only thing I changed was the from address and the SMTP Authentication, in fact entered the same information as we ave in service desk plus, only in AD selfservice plas, this gives the error.

Changing back to the default no also gives an error.