The original message was received at Sun, 14 Jan 2024 19:21:05 +0100 from m0316695.ppops.net [127.0.0.1]

----- The following addresses had permanent fatal errors ----- pablo.villanueva7@educa.madrid.org (reason: 553 sorry, mail to that recipient is not accepted (#5.7.1))

----- Transcript of session follows ----- ... while talking to [193.146.123.86]:

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<<< 553 sorry, mail to that recipient is not accepted (#5.7.1) 550 5.1.1 pablo.villanueva7@educa.madrid.org... User unknown <<< 503 RCPT first (#5.5.1)