What happened to the reforwarding of our old email addresses

my @ihug.co.nz appears to be deleted!!

I just tried to email it via my new google address

and got this

Final-Recipient: rfc822; removed@ihug.co.nz
Action: failed
Status: 5.0.0
Remote-MTA: dns; zuul.ihug.co.nz. (203.109.135.49, the server for the domain ihug.co.nz.)
Diagnostic-Code: smtp; 550 #5.1.0 Address rejected.
Last-Attempt-Date: Fri, 02 Mar 2018 17:15:02 -0800 (PST)