When you have a domain, for example, yourdomain.com , you can create your email address at that domain name like yourname@yourdomain.com . Several domain name records which I consider to be important for mail domain are: 1. MX Record Of course, it assigns a domain where the mail exchange server is located. For example: Name Priority Type Data yourdomain.com 10 MX mx.yourdomain.com 2. SPF Record SPF is a spam and phishing scam fighting method that uses DNS SPF records to define which hosts are permitted to send e-mails for a domain. See http://www.openspf.org . For example: Name Type Data yourdomain.com TXT "v=spf1 mx mx:yourdomain.com -all" This configuration means emails sent from all servers defined in the MX record of yourdomain.com are permitted by the sender organization 3. DKIM Record DKIM allows an organization to take responsibility for a message in a way t