4.6. Adding Mail Servers to dnsmasq

Problem

You have some local mail servers that you want your LAN hosts to know about. How do you do this with dnsmasq?

Solution

dnsmasq has a special record type for mailservers. You need these three lines:

	mx-host=alrac.net,mail.alrac.net,5
	mx-target=mail.alrac.net
	localmx

The mx-host line needs the domain name, server name, and MX priority. The mx-target line is the server name. localmx means all local machines should use this server.

Discussion

A priority number of 5 means the server is higher priority than servers with larger numbers, typically 10 and then multiples of 10. If you have only one mail server, you should still give it a priority to keep clients happy.

See Also