IP Pools

Postal supports sending messages from different IP addresses. This allows you to configure certain sets of IPs for different mail servers or send from different IPs based on the sender or recipient addresses.

Enabling IP pools

By default, IP pools are disabled and all email is sent from any IP address on the host running the workers. To use IP pools, you'll need to enable them in the configuration file. You can do this by setting the following in your postal.yml configuration file. You'll then need to restart Postal using postal stop and postal start.

  use_ip_pools: true

Configuring IP pools

Once you have enabled IP pools, you'll need to set them up within the web interface. You'll see an IP Pools link in the top right of the interface. From here you can add pools and then add IP addresses within them.

Once an IP pool has been added, you'll need to assign it any organization that should be permitted to use it. Open up the organization and choose IPs and then tick the pools you want to allocate.

Once allocated to an organization, you can assign the IP pool to servers from the server's Settings page. You can also use the IP pool to configure IP rules for the organization or server.

It's very important to make sure that the IP addresses you add in the web interface are actually configured on your Postal servers. If the IPs don't exist on the server, message delivery may fail or messages will not be dequeued correctly.