An e-mail router is an intermediate system that Simple Message Transfer Protocol (SMTP) delivers mail to when it cannot locate the recipient's exact IP address.
The e-mail router routes the e-mail to the IP address or to another router. Route your outgoing e-mail to an alternative system if your local server fails to deliver the e-mail to the system. If you have a firewall, you can use the firewall as your router.
To set the router, follow these steps:
To route e-mail through a firewall, follow these steps: