What is an MX record, and how is it created?
Article Number: 1210 | Last Updated: Wed, May 22, 2013 3:04 PM
MX Records Overview
An MX (mail exchange) record is an entry in your DNS zone file which specifies a mail server to handle a domain's email. You must configure an MX record to receive email to your domain.
If you are using Kerio Connect as an internal email system, with no communication outside of your domain, it's not necessary to configure an MX record for your domain. You may configure any domain in Kerio Connect, as it does not perform any DNS validation of its local domain names.
Setting Up an MX Record
Check if a DNS server applied the MX record changes by using nslookup command-line tool:
mac-mini: username$ nslookup > server 188.8.131.52Default server: 184.108.40.206 Address: 220.127.116.11#53 > set q=MX > kerio.com Server: 18.104.22.168 Address: 22.214.171.124#53 ... >
Checking an MX Record
You can check a DNS MX record using an online test tool (e.g. http://mxtoolbox.com/) or by using nslookup command-line tool.
In the following example, three servers can receive emails for the kerio.com email domain. The lowest number means the highest server preference. In this example the primary MX server (the server with highest preference) is mx1.kerio.com: