LUNA EMAIL IS CONSIDERED SPAM

I purchased a Microsoft 365 Business Email account and added it to my LUNA account. Upon testing the account this is the message I received from Outlook.

Diagnostic information for administrators:

Generating server: YT2PR01MB9745.CANPRD01.PROD.OUTLOOK.COM

[email protected]
Remote server returned '550 5.7.501 Service unavailable. Spam abuse detected from IP range. For more information please go to http://go.microsoft.com/fwlink/?LinkId=526653. S(2017052602) [YT5PR01MB11229.CANPRD01.PROD.OUTLOOK.COM 2024-08-02T20:38:07.018Z 08DCB077B612681F]'

Can you please tell me if there is a fix for this?