Most Common Reasons for Microsoft Blacklisting

Microsoft blacklisting has become an increasingly common issue. Below are the most frequent causes:

• Missing SPF/DKIM records
  Ensure proper email authentication is configured. You can test your SPF and DKIM settings here: https://dkimvalidator.com/

• Spam originating from your hostname
  Check that no unauthorised or malicious emails are being sent from your server.

• Improper email content
  Messages with poor formatting or suspicious content can trigger filters. Test your email content here: https://www.mail-tester.com/

• Manual blacklisting by recipients
  Some Microsoft users may have marked your emails as spam or blocked your address manually.