If your organization is using services that have a firewall or other IP based security, you may need to configure it to allow the app’s public IP addresses so we can send requests to your mail servers.
The addresses that need to be allowed depends on where your app data is located.
App location | IP addresses to allow |
|---|---|
USA | 54.210.55.45 54.210.87.155 |
EU and DE | 18.199.53.18 3.72.144.3 |