Open Source C Email Servers

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.

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!

MailCleaner Open Source Edition is now discontinued but will continue under the spamtagger project https://github.com/SpamTagger [antispam] MailCleaner is an anti-spam / anti-virus filter SMTP gateway with user and admin web interfaces, quarantine, multi-domains, multi-templates, multi-languages. Using Bayes, RBLs, Spamassassin, MailScanner, ClamAV. Based on Debian. Enterprise ready. MailCleaner is an anti spam gateway installed between your mail infrastructure and the Internet. It includes a complete GNU/Linux OS and a graphical web interface for user and administrative access. It comes in the form of virtual machine templates.. - fully compatible with any SMTP mail server (Exchange, Zimbra, O365,...)

Filebench is a file system and storage benchmark that can generate both micro- and macro-workloads. It employs versatile Workload Model Language (WML) for detailed workload specification. Filebench includes several popular macro-workloads in its distribution: Web-server, Mail-server, Database-server, and others.

It is not only a web server, it is also Mail server, DNS server, FTP server, Proxy server, VPN server and client... All in one! This program will help you to open all the possibilities Internet can offer for your company - public site, provide Internet access and personal mailboxes for each employee! HTTP server. Server Side Includes. Regular expression in SSI. CGI interface for scripts (Executable files; Perl,PHP, or another external interpreters) ISAPI interface. Virtual hosts and directories Mail POP3 server. SMTP server. FTP server HTTP proxy server DNS server DHCP server HTTP TLS VPN server

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.

Mailfilter to secure maildrops while fetch mails from a remote mail server and prevent mailloops, unwanted resend to external receipients and/or virus and spam.

xstress is a SMTP mail server stress testing tool. xstress creates multiple connections (using threads) to the (configured) mail server and sends mails with varying subject, body, attachment and TO/FROM addresses.

Web-interface management for virtual domains, email-addresses and aliases for the courier mail server. Depends on MySQL and PhP

Extensive High Availability Modules (XHAM) provides “active-active” failsafe solutions to your Linux Firewall, Gateway, Router, Email Server, NIDS (Snort), Proxy, Samba, MySQL (with NAS), and Apache.

KQ-Mail is a modular SMTP mail server using kernel queues to communicate between modules. In it\'s basic mode it is ideal to sit between the internet and your primary mail server to provide a buffer and or a SMTP RFC enforcement engine

MailRefinery is a tiny Linux distribution which will turn a machine into a complete mail server including Spam Assassin, GPL Virus filtering, POP, SPOP, IMAP, IMP, Fetchmail and a complete PHP based web interface to control it all.

OdeiaVir is a Free Software program designed to integrate virus scanning into an e-mail server. It currently only supports qmail as an MTA, although Sendmail support is in the works.

This project is named PSCM, an acronym for POSTFIX, Spamassassin, ClamAV, Mailscanner. It is an integrated RPM package featuring a SMTP mail server, with spam filtering and virus scanning capabilities, designed for easy installation and usage.

Quick Mail Project is Mail Server with Web mail. The project is independed platform support designed Using Java ,C, PHP ,MySQL database . Its support RFC SMTP protocol , RFC Internet Message, Multi domains, forward, block, spam bulk and a lot more.

A small, fast, secure, anti-spam SMTP mail server (MTA). Delivery to mbox files and Maildirs supported. qwik-smtpd supports RBL, relay checking, raw/custom message handlers, and more. Custom authentication via checkpassword and a qmail-compatible configu

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.

SMTA (Simple Mail Transfer Agent) - SMTP mail server. As simple as possible.

SPAMtasm is an SMTP open-relay honeypot. Its purpose is to trick spammers into thinking they have found yet another open relay mail server. In reality, SPAMtasm will simply respond as if everything is okay and discard all the e-mails.

SpamCheetah is an OpenBSD greylisting based spam filter. It is a liveCD that can run on any machine and it does not modify your hard disk or anything else. It is a network level spam filter and you have to run a separate mail server with it.

Simple easy-to-configure SMTP server.

Syron Qmail is a qmail distribution based on netqmail and qmail-sql which tries to unify several public available patches to include almost all modern mail server features into qmail (SQL User Database, SMTP AUTH/TLS, high load adjustments and more).

Webkosa is the public, open source edition of the popular Webcrossing server which has been used by thousands of sites for online communities, social networks and agile Web 2.0 object-oriented development. Webkosa includes its own integrated web server, email server, ftp server, out-of-the-box forums with discussions, users and authentication, post-by-email and numerous other user and community-oriented features to get you started with development, or use as is. Webkosa includes a native object-oriented NoSQL database, which is scriptable with its enhanced server-side JavaScript. Webkosa's all-in-one architecture makes deployment easy with no "extra servers" required. By modifying and adding scripts it is infinitely customizable. Webkosa is sponsored by Elliptics, Ltd., the owner of the Webcrossing software product line, and was launched by both Elliptics, Ltd. and Bayspire, Inc.

i-MSCP (internet Multi Server Control Panel) is an open-source project which allows the management of shared hosting environments on Linux servers. i-MSCP aims to provide an easy-to-use Web interface for end-users (administrators, resellers and clients) and to manage servers without any manual intervention on the filesystem.