Grow with us: Join Postmark's new referral partner program and start earning
x

Reminder: New public API endpoints — action may be required

We recently announced that to help increase the capacity of our API we plan to add new public endpoints in the coming weeks. If your application restricts access to public IPs, please ensure that the following IPs are whitelisted:

  • 3.137.63.180
  • 18.216.134.80

We originally intended to start moving API traffic to these new IPs in March, but we now plan to start using these IPs in production on June 22nd. Please make sure these IPs are allowed by any firewall or routing rules you may be using.