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Delivery has failed to these recipients or groups

jade 0 Reputation points
2026-04-08T21:05:16.6766667+00:00

I keep getting the message below, despite changing the text / content to sound less like spam:

This has now happened for 2 different contacts.

I am using hotmail / outlook on Chrome.

Delivery has failed to these recipients or groups:

[person's email address]

Your message wasn't delivered because the recipient's email provider rejected it.

Diagnostic information for administrators:

Generating server: AS4PR08MB7759.eurprd08.prod.outlook.com

[person's email address] Remote server returned '554 5.7.0 < #5.7.520 smtp;550 5.7.520 Message blocked because it contains content identified as spam. AS(4810)>' Diagnostic information for administrators:

Generating server: DB9PR08MB8674.eurprd08.prod.outlook.com

[person's email address] Remote server returned '554 5.7.0 < #5.7.520 smtp;550 5.7.520 Message blocked because it contains content identified as spam. AS(4810)>'

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  1. Emmanuel Santana 38,175 Reputation points Independent Advisor
    2026-04-09T01:26:01.46+00:00

    Hello. What kind of content are you sending? Are there any attachments or anything that might be mistaken for spam? Also, do your emails include a signature?

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