A program alias An alias is another name assigned to a host name that can be used in place of the host name plus domain A term that refers to the subdivisions of the Internet. Domain can mean the major subdivision of which your network is a part, (.com, .edu, .gov, .net, .us, .uk), or it can refer to your part of the network, as in Ipswitch.com. See also Domain Name System. name. Aliases are often used to shorten long host names for convenience.domain name. Aliases are often used to shorten long host names for convenience. is a user ID that causes any mail sent to it to start a program that can accept the mail message for further processing. The alias consists of a path and executable file name, plus any required command line parameters.
When email is sent to the program alias, the executable program is invoked and the entire content of the email message is passed to the executable program (as a .tmp file).