550 Sender verify failed

23. October 2013 · Write a comment · Categories: Hotmail, Outlook.com
I set up everything was fine for the domain adlcapital.com but having an issue when sending and receiving mails to one domain in particular (saif-capital.com)

Where i get the following error. 

This happens to all accounts on saif-capital.com mails and the accounts are valid and they get and send mails to all the rest but not to adlcapital.com

The error message is 

Final-Recipient: rfc822;*** Email address is removed for privacy ***
Action: failed
Status: 5.5.0
Diagnostic-Code: smtp;550-Verification failed for <*** Email address is removed for privacy ***>
550-No Such User Here"
550 Sender verify failed

How do i resolve this issue

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