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What is an MX record, and how is it created?
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.
NOTE
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.
mac-mini: username$ nslookup
> server 8.8.8.8Default server: 8.8.8.8
Address: 8.8.8.8#53
> set q=MX
> kerio.com
Server: 8.8.8.8
Address: 8.8.8.8#53
...
>
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: