28.7 Configuring DNS MX Records
When you registered and configured your domain name with a registrar, a number of default values will have been configured in the DNS settings. One of these is the so-called Mail Exchanger (MX) record. This record essentially defines where email addressed to your domain should be sent and is usually set by default to a mail server provided by your registrar. If you are hosting your own mail server, the MX record should be set to your domain or the address of your mail server. The steps on how to make this change will depend on your domain registrar but generally involves editing the DNS information for the domain and either adding or editing an existing MX record so that it points to your email server.
