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
To relay email outside of your locally configured domains, ensure that the underlying operating system properly resolves domain names. This means that a valid domain name server must be configured in the TCP/IP settings of the host operating system.
Configure the MX record on the authoritative name server for your domain:
In most cases, the authoritative name server is the DNS servers managed by your domain registrar – for example, Godaddy or Network Solutions.
These domain registrars usually provide additional services, including DNS hosting. In this case, you will use a web-based DNS configuration utility to configure your MX record.
Since most DNS servers store its information in a cache for a certain period of time, it might take up to 24 hours for the change to get propagated over the internet to DNS servers where the record is stored. Email delivery can be pointed to the secondary email server in the MX record list until the primary server DNS name is changed.
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
> set q=MX
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:
http://en.wikipedia.org/wiki/Mx_record - A mail exchanger record (MX record) is a type of resource record in the Domain Name System that specifies a mail server responsible for accepting email messages on behalf of a recipient's domain, and a preference value used to prioritize mail delivery if multiple mail servers are available. The set of MX records of a domain name specifies how email should be routed with the Simple Mail Transfer Protocol.
HomesupportEmail Management What is an MX record, and how is it created?
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