'mailto' is a string variable whose value is a mail address (or
 comma-separated list of addresses).  If this is set and the 'mail'
 command is issued with no arguments, then the output of the last command
 is mailed to that address.

 Example:

    set mailto user@frobozz.com

 Example:

    set mailto user1@hello.edu,user2@goodbye.com

 All the various Internet addressing styles are understood. BITNET sites
 should use the convention

    user@sitename.bitnet

 UUCP addresses can be specified as 

    user@sitename.uucp

 If you would like to mail to an Internet IP address then use '[]'.

 Example:

	set mailto bajan@[132.206.44.5]