Reporting-MTA: dns;ims-ms-daemon (tcp_mailstore)

Original-recipient: rfc822;0hf800ivz5fvyc@bis-internet.co.uk
Final-recipient: rfc822;0hf800ivz5fvyc@bis-internet.co.uk
Action: failed
Status: 5.1.1 (Remote SMTP server has rejected address)
Remote-MTA: dns;mailstore1.bis.pub (TCP|192.168.206.59|23884|192.168.206.23|25)
 (earth.bis-internet.co.uk -- Server ESMTP [BIS Messaging Platform - Andromeda])
Diagnostic-code: smtp;550 5.1.1 unknown or illegal alias:
 0hf800ivz5fvyc@bis-internet.co.uk