CFX_CHECKEMAIL is a ColdFusion CFX tag that validates the syntax of email addresses based on the Internet standard, RFC 822. This standard specifies the syntax for text messages that are sent among computer users, within the framework of "electronic mail". This standard defines the syntax, and syntax rules, for the email addresses. In addition to the rules defined by this specification, CFX_CHECKEMAIL will also validate the top level domain name used, if requested to do so.

CFX_CHECKEMAIL will validate the "commonly used", "new", "restricted" and "international country codes" used as the top level domain name.

In the above example, the syntax of the email address is validated and the top level domain name "com" is validated.