senders getting block msg

Question

Hello im facing issues with all my maximum senders when ever they are sending me mail im not getting it and showing blocked msg to them can any one help

Answer 1

Hi,

Is the error code 550.5.7.23

What you are seeing is actually a known issue from Microsoft's backend. Likely, your domain is also affected, but since this forum is user-managed I cannot independently confirm that for you.

Some resources:

https://learn.microsoft.com/en-us/answers/questions/6063210/spf-validation-error?page=1#answers

https://yourwindowsguide.com/2026/11/outlook-spf-error.html

1. Sign in to Outlook on the web.
2. Open Help and select Feedback.
3. Select Report a problem.
4. Describe the issue, noting that senders receive an SPF validation error when emailing your address.
5. Enable Can we contact you about this feedback? and Collect logs for feedback.
6. Select Submit.

You can use the following description in your report:

I am unable to receive emails from certain senders on my Hotmail/Outlook.com account. The senders are receiving a non-delivery report with the error 550 5.7.23 or 550 5.7.1, stating that the message lacks SPF/DKIM/DMARC authentication records (AS9031519). These senders were previously able to email me without any problems. Please investigate whether this is related to email validation on the Outlook.com service.

I hope this information helps. If you have any more questions, don't hesitate to reach out. Wishing you good luck!

A Windows MVP writes content on the above website, so it is safe. However, do watch out for the ads. It should translate into your Browser language automatically.