From: Mail Delivery Subsystem <[email protected]> To: a> Subject: [EXTERNAL) Returned mail: see transcript for details Date: Mon, 15 Nov 2021 03:34:03 +0000 Embedded: unnamed The original message was received at Mon, 15 Nov 2021 03:33:57 GMT from [10.187.9.62] The following addresses had permanent fatal errors ---- <[email protected]> (reason: 550 5.1.1 <[email protected]>: user does not exist) Transcript of session follows ---- ... while talking to mx02.mail.icloud.com.: >» DATA <<< 550 5.1.1 <[email protected]>: user does not exist 550 5.1.1 <[email protected]>... User unknown cc< 554 5.5.1 Error no valid recipients EFTA00010153