Forwarding to an MSN account

Forwarding to an MSN account

I have zoho set up to automatically forward to an msn.com address. The mail is forwarding and arriving in the inbox at msn.com, but the sender gets this bounce back. The bounce back comes from the hotmail postmaster, but indicates a problem with the zoho end of the mail. Can anyone help?

This is an automatically generated Delivery Status Notification.

Delivery to the following recipients failed.

        myname@mydomainonzoho.com


Final-Recipient:  rfc822;myname@mydomainonzoho.com
Action: failed
Status: 5.5.0
Diagnostic-Code: smtp;550 Requested action not taken: mailbox unavailable (495782920:4185:- 2147467259 )