vpopmail provides you an easy way to manage virtual email domains.

Rit script can be used to manipulate mailboxes over IMAP, allowing you to copy and delete mailboxes and their contents.

libsmtp is a C library to send mail via SMTP.

mimetic is an Email library (MIME) written in C++.

new 2.5.0 - Amavisd is a high-performance and reliable interface between mailer (MTA) and one or more content checkers: virus scanners, and/or Mail::SpamAssassin Perl module.

Protector is a low maintenance e-mail virus blockade system.

Tool - MIME-Tool application is a mime encoding tool.

PowerMail is a redundant and distributed system for receiving and storing electronic mail.

ripMIME has a single sole pupose, to extract the attached files out of a MIME package.

senddfbymail is a Perl script (with Web interface) that can download files from the Internet and e-mail them to a certain user.

Active Spam Killer helps you to remove spam messages.

Checkaliases reads a sendmail aliases file and reports problems in it.

HLDFilter is a unix based mail filter written in perl to replace procmail and many other mail utilities.

mail2clf generates a CLF (Common Logfile Format) file from a bunch of mails.

mail2thread finds threads in a bunch of mail messages and outputs them in various ways.

mboxstats creates several top-10 lists from a file containing message in mbox-format.

IMAP Migration Tool allows you to migrate or archive your email from one IMAP server to another.

newmail is a small utility that stays in the background and helps you keep track of your incoming mail.

Pfqueue is an effort to give postqueue/mailq/postsuper/exim4 a console (ncurses) interface.

Poppy will individually read the headers of messages on a POP3 or IMAP account.

qconfirm is an implementation of a delivery confirmation process for a mailing list or mail address.

qmHandle is a simple program which allows you to view and manage the qmail message queue.

randomsig is a program for randomly generating signature lines for email messages.

safecat implements Dan Bernstein's maildir algorithm, copying standard input safely to a specified directory.

Siggen is an email signature generator for encrypted ansi c and brainf*ck signatures.