I just created a new POP3 account in my 2003 Outlook. I checked the settings and the Inbox-Outbox are working well.

However if I send from my standard Outlook POP3 account a mail to my second one, I do not receive it.

I receive the message:

550-Mailbox unknown.  Either there is no mailbox associated with this
550-name or you do not have authorization to see it. 550 5.1.1 User unknown

Does anybody know how to fix this?


The error message already tells you the problem - you do not have access to the mailbox.

Possible causes:

  • You mistyped your login name.
  • You have been denied access by the administrator (or by an evil mailserver).

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy