DW,
I see these errors, even though I can personally access the bounced email account (using webmail), and SMTP seems to be fine:
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Testing mail servers..
[Bounce Handling]
Is enabled? Yes, Using a mailbox
Connecting.. Connected!
Verifying username and password... Failed!
The bounced message mailbox is not configured correctly.
[SMTP Server]
Is enabled? Yes
Connecting to SMTP server.. Connected!
Sending test email to remote address.. Problem setting receiver to Remote Test Address
The SMTP server is not configured correctly. Check your settings.
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Any idea WHAT is going on here?