We currently deliver campaigns from the following IP addresses:

• 103.28.40.0/22
• 184.106.87.160/29
• 184.106.87.168/29
• 184.106.86.128/28
• 206.72.127.0/24
• ipv4 27.126.144.0/21

If you have a system that requires that you enter every IP address separately, there's a handy tool here that will deciper the /xx at the end of the IP range.

If you are finding that certain clients are not receiving their campaigns, you may ask their mail administrator to whitelist these IP's to ensure the emails are let through. These IP's may change (or be added to) in the future as we add more delivery servers, and we will keep this page up to date.