Open Source C Post-Office Software

The Courier mail transfer agent (MTA) is an integrated mail/groupware server based on open commodity protocols such as ESMTP, IMAP, POP3, LDAP, SSL, and HTTP. Courier provides ESMTP, IMAP, POP3, Webmail, calendaring, and mailing list services.

Fetchmail is a mail retrieval daemon that can download messages from POP3, IMAP, ODMR and ETRN-based stores, with SSL/TLS security including certificate verification, and pass downloaded mail to a local SMTP or LMTP server, or a message delivery agent such as maildrop.

A command line utility for synchronizing remote IMAP mailboxes and local maildir-style mailboxes. This is useful for working in disconnected (off-line) mode, such as on a laptop, but also for mirroring mailboxes between servers.

FreePOPs is a webmail to pop3 conversion daemon. It is extensible to support other webmail using the scripting language LUA. See the homepage for supported webmails.

Highly scalable/configurable Messaging Platform allowing users in a domain to be distributed on multiple hosts, has multiple queues. Provides virtual domains/users in MySQL. Modern MSP class qmail replacement with ESMTP, POP3/IMAP, QMTP, QMQP support

YPOPs! is an application which emulates a POP3/SMTP mail server and provides free POP3 and SMTP access to Yahoo! Mail. It does not depend on Yahoo's POP3/SMTP mail server. You can use a mail client of your choice!

P3Scan is a fully transparent scanning proxy-server for email clients. It provides scanning of incoming/outgoing email messages for Virus''s, Worms, Trojans, Spam, and harmfull attachments. It can also parse messages for web-bugs.

Rumble is a mail server suite for SMTP (ESMTPSA), HTTP, POP3 and IMAP4v1 with an extensive C/C++ and Lua API for scripting. It comes with support for SSL/TLS, SQLite and MySQL and has a web-based administration and webmail feature. Additional included modules feature greylisting, DNS blacklisting, SpamAssassin support and dynamic performance scaling as well as a multithreaded structure that allows for clustering of multiple servers for one or all domains, and with the ease of the Lua API, you can create your own new server mailing lists, CRM software, e-marketing and other extensions within minutes.

ClamMail is POP3 email proxy for Windows with integrated ClamAV antivirus engine. ClamMail is an Windows antivirus that protects your PC from viruses transferred via mail. Works with Outlook,Thunderbird,Eudora and many others using popular POP3 protocol

Mailcheck is a simple, command line, configurable tool that allows multiple mailboxes to be checked for the existence of new mail messages. It supports both mbox and maildir-style mailboxes. It also supports remote POP3 and IMAP mailboxes.

XCmail is a MIME and multi POP3 server capable mailtool for X11 using the Xclasses layout library. XCmail was designed completely object orientated and by this may be improved easily. <p> XCmail has its own server in the internet. Take a look on it.

Watch mailstores for changes and initiate mailbox syncs

An advanced qmail distribution based on qmail-sql which has SMTP, SMTPS, POP3, POP3S, IMAP, IMAPS services, a content scanner, spoofing protections, SMTP AUTH support, SMTP-after-POP/IMAP, PHP5 API, SPF support and much more...

DBMail provides a database-backend mail store using PostgreSQL or MySQL. It includes POP3 and IMAP servers to access the mail store, pipe and LMTP for message delivery, and a suite of command line utilities. Please click our Home Page link for more info.

MSWeb is a client for Microsoft's Outlook Web Access (OWA). It is intended to deliver mail from a MS exchange server to a UNIX computer. For those who are opposed to 50 MB mailreaders.

smm is a anti-spam, mail-shaper, delete-on-server software thought for users who have a slow dialup connection and are sick and tired of downloading 1MB a day of spam and Win32-worm-attached messages.

Sick of handling ifs and gotos in DOS batch files? Use this code generator to code in a higher level language, the sausage machine turns out the batch file. Mercurial repo at https://bitbucket.org/nickj/batchgen

IDMS DBMA is an effort to develop a highly scalable (c10k complient) plugin based mail agent aimed at fighting spam & viruses. Hopefully replacing hard-to-maintain, complex, resource hungry configurations used by small to large users today.

liberopops is useful for users of Libero provider who cannot read email due to its change of policy. It acts as a POP3 server which interfaces itself to the webmail service still available.

Modular POP3 daemon.

Pulsar POP3 server (daemon) is easy to use with intuitive configuration file. It supports virtual (non-system) users and virtual hosts (IP based and user supplied). Can run from xinetd, inetd or standalone.

Cyrus IMAPd is a popular IMAP server that surfaces a rich interface for extending its functionality. The Cyrus IMAPd Utilities project brings together maintenance utilities, graphical front-ends, and API handlers (such as notification daemons).

FLOPP Project is an open POP Proxy. It supports many features, including commands filtering and logging, multiple cascaded proxies, in/out access lists, statistics, etc..

A stand alone program to uncorrupt MBX formatted mailboxes. Does not use C-Client code. Tested with c-client 2001e and 2003 on linux.

MailNotifer is written in GTK+, C++ Open Source application. It's easy to configure. The notifications are themeable. It supports IMAP protocol, SSL connections. For chcek mail it using my libMNMail. Developed in Poland. Supports 2 languages(by locale), Polish language works in about 30%. Easy to work. I can runs on Linux, but few functions must be changed. TODO list: -Make smart mail checking -Repair bugs -Add theme meanager -Add full support for Polish language -Make a Linux release and something else ;)