Utilities: Administration: Server: Server Settings: Network Settings: Relay Hosts: New
Host IP address
The IP address of the relay host. A mail server must be listening on the IP address you specify.
Port
The port of the relay host receiving SMTP connections.
Maximum connections
The maximum number of connections to be made to this relay host. This setting may be used to prevent the relay host from being overwhelmed with Aurea List Manager connections.
NOTE
If one or more relay hosts are defined, domain connection limits have no effect.