mailmail man page
mailmail — Twisted sendmail compatibility script
mailmail [recipient addresses]
mailmail reads RFC822 message text from standard input and delivers them, using SMTP, to a Mail Transfer Agent listening at 127.0.0.1:25. It accepts (but does not necessarily implement) many of the standard sendmail(1) options, but it is preferable to list only the recipient addresses on the command line, and include a From header within the message text indicating the sender.
Written by Jp Calderone
To report a bug, visit http://twistedmatrix.com/trac/
Copyright © 2003-2008 Twisted Matrix Laboratories.
This is free software; see the source for copying conditions. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.