550 5.7.1 Reject for policy reason

Question

550 5.7.1 Reject for policy reason

Anonymous

I am receiving emails on outlook okay but from today I cant sent any mails .They fail and I get the following error message

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Answer 1

Hello Tony,

Thank you for contacting us! We are here to listen to you and are happy to help you.

From your description, I understand that you get the following error message (550 5.7.1 Reject for policy reason). Let me help you.

I would like to inform you that this error indicates a security setting in your organization or the recipient's organization is preventing your message from reaching the recipient. For example:

You don't have permission to send to the recipient.
The recipient is a group, and you don't have permission to send to the group or one of its subgroups.
You don't have permission to send email through an email server that's between you and the recipient.
Your message was routed to the wrong email server.

To fix this issue here I'm providing you a link: Fix NDR error 550 5.7.1 in Exchange Online - Exchange | Microsoft Learn

I hope this information will help you solve your problem. If it's useful to your problem, mark it as useful or useless so it can be useful to others.

Thank you for your patience and understanding

Best regards,

Shelby_7891 | Microsoft Community Moderator