Delivery has failed to these recipients or groups

Question

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)>'

Answer 1

Thanks for the update. Can you send emails to other accounts? In the end, this is a rejection from the recipient's system, and after multiple emails, the recipient detected them as spam.