how to config my DA Server to be relay server?

Hello,

I would like to config my centOS to be the host to send email for another host.
example.

I have IP 1 and make smart host to send mail via my "DA Server" and i would like to config only IP1 can send from "DA server"
I know it use exim but dont know how to config and allow only IP address I want to

IP1 -> DA Mail Server
IP2 -> DA Mail Server
IP3 -> DA Mail Server

please advice.

sorry my english quite poor.

Hello,

try to modify your /etc/exim.conf as the following:

1. find line:


it may looks like:


or


and add your IP there:


and restart exim.

It is work!!

It's working now thank you so much Alex!

OMG!!! so difficult "Random Question"