1. Outlook.com Postmaster


    Outlook.com Postmaster provides information for the administrators of systems sending email to Outlook.com.

  2. Troubleshooting - Outlook.com Postmaster


    Try connecting to mail.hotmail.com via port 25. If you are unable to connect, then attempt to telnet over port 25 directly to our email servers (MTAs).

  3. Outlook.com - Microsoft free personal email - hotmail.com


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  4. Smart Network Data Services - Outlook.com Postmaster


    Outlook.com Smart Network Data Services Deliverability to Outlook.com is based on your reputation. The Outlook.com Smart Network Data Services (SNDS) gives you the data you need to understand and improve your reputation at Outlook.com.

  5. SNDS - Request Access


    Please enter a network you are responsible for in one of the following forms: Single IP address:; Range: -; CIDR:

  6. Services for Senders and ISPs


    Below is an overview of services that can benefit your organization including links for more information:

  7. Policies, Practices, and Guidelines - …


    Microsoft is dedicated to help provide the most trusted and protected consumer experience on the web. Therefore, Microsoft has developed various policies, procedures, and adopted several industry best practices to help protect our consumers from abusive, unwanted or malicious email.