why do all messages sent to my hotmail get a undeliverable message

liz walker 5 Reputation points
2026-05-11T13:11:03.66+00:00

All emails to my hotmail get this sent to them:

MN1PEPF0000F0E0.mail.protection.outlook.com rejected your message to the following email addresses:

ㅤ@hotmail.com (ㅤ@hotmail.com) A communication failure occurred during the delivery of this message. Please try to resend the message later. If the problem continues, contact your email admin.

MN1PEPF0000F0E0.mail.protection.outlook.com gave this error: Requested action not taken: mailbox unavailable (S2017062302). [MN1PEPF0000F0E0.namprd04.prod.outlook.com 2026-05-11T13:03:38.567Z 08DEADD809C54643]

Microsoft 365 and Office | Microsoft 365 Defender | For home | iOS
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  1. Brian Tillman 27,015 Reputation points Independent Advisor
    2026-05-11T14:01:10.7933333+00:00

    Hi. I'm Brian and I'll try to help.

    This forum is dedicated to discussing Defender on iOS. Can you explain how your question relates to that topic?

    Do you log into your account with that same address? If you examined https://account.live.com/names/manage, do you see that address as as alias?

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