The original message was received at Mon, 20 Feb 2023 10:18:58 GMT from m0272021.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 mx1.its.manchester.ac.uk.:

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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