The original message was received at Mon, 20 Nov 2023 22:05:32 GMT from m0272022.ppops.net [127.0.0.1] ----- The following addresses had permanent fatal errors ----- <mickael.benaim@mbs.ac.uk> (reason: 550 5.1.1 No such recipient <mickael.benaim@mbs.ac.uk>) ----- Transcript of session follows ----- ... while talking to mx2.its.manchester.ac.uk.:

...

...

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