Common DNS Entry Types
Type: A Point subdomain.domain.com to a hard coded IP Address. Most direct and straight forward option, also note any change you make in your DNS program is reflected on the internet and made live immediately. The only way you will not see immediate results is if you have cached a query on your computer by looking it up PRIOR to configuring it in your DNS program. Type: MX Point subdomain.domain.com to a mail server. These type of records are special for just mail servers, they can co-exist with A records, and their only use is for routing mail to a different location. All mail implementations check for this record first before attempting to route an e-mail message. If a MX record does not exist for a host, an e-mail delivery would be attempted directly to the IP that the hostname resolves to. ...