Legitimate sender blocked – removed PII

Ivan Rach 20 Zuverlässigkeitspunkte
2025-11-05T23:17:07.7633333+00:00

Hello Microsoft Postmaster Team,

we’re seeing “550 spam message rejected” on some Hotmail/Outlook recipients.

Sender details:

From: removed PII

Return-Path: removed PII

All recipients are opt-in. Authentication passes: removed PII

Please review and remove this false positive for our domain/IP. We’re currently throttling volume and sending only to our most engaged users.

Sample error: 550 spam message rejected

Full headers attached below.

Best regards,

removed PII

Outlook | Web | Outlook im Web für Unternehmen | E‑Mail
0 Kommentare Keine Kommentare

Antwort, die vom Frageautor angenommen wurde
Jade Ng 15,860 Zuverlässigkeitspunkte Externe Microsoft-Mitarbeiter Moderator
2025-11-06T01:32:25.36+00:00

Disclaimer: This platform is in German. However, I noticed that your message was written in English, so I will respond in English to ensure clarity and provide better assistance.

Dear @Ivan Rach,

Thank you for posting your question in the Microsoft Q&A forum.

This site Outlook.com Postmasterprovides information to information technology professionals who administer systems that send email to and receive email from Outlook.com. It also provides some information about how users with Outlook.com accounts can report junk email and phishing attempts. However, it is not intended to provide extensive support to Outlook.com users. If you are an Outlook.com user in need of support, please visit Microsoft Support.

To navigate this site please use the navigation links to the left, or to jump right to the most requested information please click on one of the links below.

If you have an urgent deliverability issue, please have the person most familiar with the issue and your email infrastructure [contact sender support].

If it still didn't work, you may reach out to Microsoft personal support  

Benutzerbild

  • Enter Office or your issue in general in the box below "We're here for you" then click "Get Help 4.Scroll down and click on Contact Support then log in to your personal Microsoft account  

If the account cannot be logged in, you can use another account or create a new account to execute   

  • Select "Microsoft 365 and Office" in Products & Services, select "Technical Support" as a category, and click Confirm.
  • Select "Chat in a web browser and support specialist" to enter the chat window.  

Thank you for your kindness and understanding! Please let me know if you need anything else. Looking forward to your response!


If the answer is helpful, please click "Accept Answer" and kindly upvote it. If you have extra questions about this answer, please click "Comment".

Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.User's image

War diese Antwort hilfreich?

0 Kommentare Keine Kommentare

0 zusätzliche Antworten

Sortieren nach: Am hilfreichsten

Ihre Antwort

Antworten können von Fragestellenden als „Angenommen“ und von Moderierenden als „Empfohlen“ gekennzeichnet werden, wodurch Benutzende wissen, dass diese Antwort das Problem des Fragestellenden gelöst hat.