How to forward all mail to a gateway?

[lgwong]

I wish to forward all mail from exim to a smarthost for delivery. How can I accomplish this?

I have check exim site and found

Q0304: How do I configure Exim to send all non-local mail to a gateway host?

A0304: Replace the dnslookup router in the default configuration with the following:

send_to_gateway:
driver = manualroute
domains = !+local_domains
transport = remote_smtp
route_list = * gate.way.host
If there are several hosts you can send to, you can specify them as a colon-separated list.

But where should I put that config script?

[Drew Nichols]

I'm looking to do the same thing...

[bamasbest]

WHM - Server Setup - Exim Configuration Editor

Switch to advanced mode and changes that you make should not be overwritten by future cPanel updates.