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IP addresses of Groups.io mail servers

If you experience issues receiving email from Groups.io, or you need to configure your mail server or spam filter to allow messages from Groups.io, you can whitelist Groups.io’s outgoing mail server IP addresses. Add these IP addresses to your allowlist:

  • 66.175.222.12  
  • 66.175.222.108  
  • 45.79.227.220  
  • 45.79.224.9  
  • 45.79.224.7  
  • 192.53.124.123  
  • 173.255.243.56  
  • 192.53.124.254  

Groups.io uses these IP addresses to send outgoing mail. Whitelisting them helps ensure reliable email delivery from your groups.