Edit The Smtp Proxy - Watchguard Firebox X15 User Manual

About the SMTP proxy
SMTP (Simple Mail Transport Protocol) is a protocol used to send email messages between email servers and
also between email clients and email servers. It usually uses a TCP connection on port 25. You use the SMTP
proxy to control email messages and email content. The proxy scans SMTP messages for a number of filtered
parameters, and compares them against the rules in the proxy configuration.
If you have a second SMTP email server, you must have an additional external IP address to give to the Edge.
You can then enable 1-to-1 NAT and make a custom incoming proxy policy for SMTP.

Edit the SMTP proxy

To change the default settings of the SMTP proxy, select Firewall > Incoming from the navigation menu. Find
the SMTP proxy and click Edit. Make sure you look at all tabs of the SMTP proxy configuration. The Properties
tab shows you what port and protocol the proxy uses. You cannot make changes on this tab.
User Guide
Proxy Settings
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