mailx is a Unix utility program for sending and receiving mail, also known as a Mail User Agent program. Being a console application with a command syntax similar to ed, it is the POSIX standardized variantPOSIX standard entry of the Berkeley Mail utility.mail, Mail, mailx, nail—history notes
See also mail (Unix)
References
External links
History of mail and mailx from the Heirloom Project mailx Tutorial from the engineering Dpt. at Purdue University at GNU Mailutils manual S-nail manual