Package sendmail

A widely used Mail Transport Agent (MTA)

http://www.sendmail.org/

The Sendmail program is a very widely used Mail Transport Agent (MTA).
MTAs send mail from one machine to another. Sendmail is not a client
program, which you use to read your email. Sendmail is a
behind-the-scenes program which actually moves your email over
networks or the Internet to where you want it to go.

If you ever need to reconfigure Sendmail, you will also need to have
the sendmail-cf package installed. If you need documentation on
Sendmail, you can install the sendmail-doc package.

General Commands
Command Description
mailq.sendmail print the mail queue
newaliases.sendmail rebuild the data base for the mail aliases file
File Formats
File Description
aliases.sendmail aliases file for sendmail
System Administration
Command Description
editmap.sendmail query and edit single records in database maps for sendmail
mailstats display mail statistics
makemap.sendmail create database maps for sendmail
praliases display system mail aliases
rmail.sendmail handle remote mail received via uucp
sendmail.sendmail an electronic mail transport agent
smrsh restricted shell for sendmail