Mail delivery failed: returning message to sender

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This message was created automatically by mail delivery software.
A message that you sent could not be delivered to one or more of its recipients. This is a permanent error. The following address(es) failed:
[email protected] host mail.wcgwave.ca [216.36.128.170] SMTP error from remote mail server after RCPT TO:<[email protected]>: 550 User [[email protected]] does not exist [email protected] host nam.olc.protection.outlook.com [52.101.9.25] SMTP error from remote mail server after RCPT TO:<[email protected]>: 550 5.5.0 Requested action not taken: mailbox unavailable (S2017062302). [BL6PEPF00022575.namprd02.prod.outlook.com 2025-11-16T04:46:58.903Z 08DE241AF5857869]