The original message was received at Fri, 1 Sep 2023 09:30:44 +0100 from m0307601.ppops.net [127.0.0.1] ----- The following addresses had permanent fatal errors ----- <damian.grimshaw@mbs.ac.uk> (reason: 550 5.1.1 No such recipient <damian.grimshaw@mbs.ac.uk>) ----- Transcript of session follows ----- ... while talking to mx1.its.manchester.ac.uk.:

...

...

RCPT To:<damian.grimshaw@mbs.ac.uk> <<< 550 5.1.1 No such recipient <damian.grimshaw@mbs.ac.uk> 550 5.1.1 <damian.grimshaw@mbs.ac.uk>... User unknown