Other mail system problem 550

Question

Hi Team,

I am receiving the below error while sending email to the particular domain.

The following message to <e-mail address > was undeliverable.

The reason for the problem:

5.3.0 - Other mail system problem 550-'Your message to <e-mail address> was\nclassified as SPAM.  Please add more content, cut down on HTML links, use\nfewer naughty words etc.  Also, ask your IT dept to make sure your\nmailserver has REVERSEDNS, SPF, DKIM, and is not on any black lists. Your\nscore: 130'

Please advise.

Regards, 

Artur

Answer 1

Hello,

Problem with sending occurs only with @stjorsen.pl domain.

Answer 2

Hello Jokiel Artur,

Thank you for posting in Microsoft Community. I'm happy to assist you with this request.

To help us narrow down the issue you are facing kindly share a full screenshot of the error message you are getting. The full information and the error codes will help us to understand why your emails are bouncing back.

In the meantime ask your admin/IT to check if SPF and DKIM are enabled in your organization. Set up SPF identify valid email sources for your Microsoft 365 domain | Microsoft Learn and How to use DKIM for email in your custom domain | Microsoft Learn.

Please do not hesitate to contact me with any questions or concerns. I look forward to hearing from you.

Please understand that our initial response may not always resolve the issue immediately. However, with your help and more detailed information, we can work together to find a solution.

Sincerely,

Microsoft Community Moderator

Answer 3

Hi

Good day.

Thank for posting in the community.

We've received your query and you can expect to receive response from one of our community moderator accordingly.

At this point, we appreciate your patience and cooperation. Thank you.

Sincerely,

Community moderator