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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?

1

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).

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