CONTENTS: pine sendmail smailcfg mailx deliver uucp  
deliver:  A small and simple program that delivers electronic mail once it
deliver:  has arrived at a given machine. Although designed for Xenix, it
deliver:  works well on many platforms, including (of course) Linux. Deliver
deliver:  allows great flexibility in the handling of local mail delivery.
deliver:  All files used to control deliver are shell scripts. Thus, anything
deliver:  that can be called by a shell script can be used to control mail
deliver:  delivery. Deliver can also be used in conjunction with Smail. It
deliver:  is included by default with Slackware's sendmail package, too.
deliver:
deliver:
deliver:
mailx:    BSD mailx 5.5.
mailx:
mailx:    Mail is a intelligent mail processing system, which has a command
mailx:    syntax reminiscent of ed with lines replaced by messages. It's small;
mailx:    it's the standard; it's a good thing to install if you're going to use
mailx:    mail.
mailx:
mailx:
mailx:
mailx:
mailx:
sendmail: BSD sendmail 8.6.11.
sendmail:
sendmail: Eric Allman's mail transport agent. The _Unix System Administration
sendmail: Handbook_ calls sendmail 'The most complex and complete mail delivery
sendmail: system in common use...'
sendmail:
sendmail: Ready-made configuration files are included for systems connected by
sendmail: TCP/IP (with or without a nameserver) and for systems using UUCP.
sendmail:
sendmail: 'deliver' is included as a local mail agent.
sendmail:
smailcfg: Configuration files for sendmail.
smailcfg:
smailcfg: These files are used to create sendmail.cf configuration files. The
smailcfg: m4 macro processor (on the D series of disks) is also required in
smailcfg: order to make use of these files. 
smailcfg:
smailcfg: These files and the documentation in /usr/src/sendmail should make it
smailcfg: possible to support virtually any mail configuration. NOTE: you
smailcfg: probably won't need this package if you're planning to use one of the
smailcfg: sendmail.cf samples included in the sendmail package.
smailcfg:
pine:     Pine version 3.91
pine:
pine:     A menu driven user mail program. Originally based on Elm (Pine Is
pine:     No-longer Elm), but with many additional features that make it
pine:     easier to use.
pine:
pine:
pine:
pine:
pine:
pine:
uucp:     Taylor UUCP version 1.05
uucp:
uucp:     Ian Taylor's Unix to Unix copy: mail and news over modem lines. 
uucp:     This is the standard UUCP package of the Free Software Foundation.
uucp:
uucp:     Configured to use HoneyDanBer and/or Taylor configuration files.
uucp:
uucp:
uucp:
uucp:
uucp: