Dear khazem hsen
Welcome to the Microsoft Community.
According to your description, your problem is that Outlook marks my emails as spam and redirects them to the “Spam” folder.
In your case, we think you may be an enterprise user and the issue may be caused by Outlook's spam filtering mechanism mislabeling your email as spam. This may happen despite the fact that your mail server has been set up with DKIM/SPF/DMARC/rDNS and has passed all authentication checks.
You can try the following measures to solve this problem:
- Ensure that the content of your email does not contain any keywords or content that could be recognized as spam by spam filtering algorithms.
- Feedback the issue to your Outlook users and ask them to add your email address to their secure whitelist to ensure that your emails are not mistakenly flagged as spam.
- Check the formatting and layout of your email to make sure it looks like a legitimate email and does not contain hyperlinks or other advertising-like images.
- Try creating a rule through Outlook's Settings or Rules feature to ensure that your email is not automatically moved to the Spam folder, or that emails from your email address are automatically marked as non-spam.
If the problem persists, please try contacting the Microsoft Enterprise Technical Support team for assistance and guidance on how to resolve the issue of your email being mislabeled as spam.
Global Customer Service phone numbers - Microsoft Support
Wish you a happy life and all the best .
Best regards
Michael | Microsoft Community Support Specialist