Free email server software for linux

Streamnik Server project is an IPTV server based on the open codecs Ogg/Vorbis and Ogg/Theora. It can stream a number of different channels and is optimized to run on leased (virtual) servers. The program schedule is defined by an SQL database table and can be changed at runtime.

Messa is an instant messager client and server. The client has a curses interface and works on the console.

Messa project supports multilingual messages and private messages. The server supports monoprocess operation (without threads), the ability to choose the listening port, and the ability to run under the console.

QEMU Server Tools is a set of simple command-line scripts for managing multiple QEMU VMs easily without requiring a graphical frontend.

QEMU Server Tools organizes VMs into directories and mimics the usage of command line tools from VMware Server.

pDonkeyS is Perl implementation of an eDonkey server. The main goal of the server is to provide framework for further eDonkey protocol exploration, but it could be useful in testing of client software, since the server can be configured to output very detailed debugging info about eDonkey traffic.

This server was made to provide framework for further eDonkey protocol exploration, but it could be usefull in testing of client software, since the server can be configured to output very detailed debug info about eDonkey traffic.

Metadot Portal Server is a leading open source portal system. Its revolutionary ease of use allows non technical people to create very powerful websites and portals just with the clicks of a mouse. Its architecture makes it extremely easy to customize and deploy.
Metadot Portal Server is available for free under the GNU General Public License (GPL). It provides collaboration, content management, as well as My News Page (like My Yahoo) and online database applications. Typically it is used to create web portals, intranets, extranets, organization and project websites.
When it was first released in April 2000, it revolutionized the way complex websites are built by giving easy-to-use tools to non-technical users allowing them to create powerful database-backed websites without having to involve a webmaster or the IT department!
It runs primarily on Linux, Apache, MySQL and Perl and supports Sun Solaris, Windows OSes and Oracle database.
Main features:
- Discussion Forum
- File and Content Management
- Task / To-Do List
- Calendar
- Poll
- FAQs
- User Personal Website
- Group and user-based access control
- My News Page - like My Yahoo
- Email Notifications
- URL management
- Rich text Editor (from interactivetools.com)
- Site themes and templates
- and many more features!
Enhancements:
- Fixes problems where certain Windows-based upload paths would not work correctly.
- Fixes a problem with the aggregated calendar Gizmo.
- Fixes problems with email processing that could cause all discussions and RSS feeds to stop working.
- Fixes a problem with the built-in search that could cause it to never finish processing.

kraskarta is an interactive map engine. It is based on Macromedia Flash technology with server scripts written in Perl with a PostgreSQL database.
kraskartas features include the ability to search for a street and address, for a bus route, and for information about objects.
Enhancements:
- This is the first open release after being proprietary code.

Mail::Toaster is an installer for a collection of software which provides a full-featured mail server. The system is built around the qmail mail transport agent, with many additions and modifications
Main features:
- SMTP Mail Server (SMTP-AUTH, chk-user, SPF, TLS, tarpitting, RBL)
- Virtual Domain Hosting w/delegated administration
- Virtual Domain Users
- Mailing List (Ezmlm)
- AutoResponder
- Web Based E-Mail (Sqwebmail, Squirrelmail, V-Webmail)
- Web Based Domain Administration
- Mail Filtering (rbls, SpamAssassin, simscan, Qmail-Scanner)
- Virus Scanning (ClamAV, F-Prot, Uvscan)
- SMTP roaming via SMTP-AUTH, POP-AUTH, & IMAP-AUTH
- SMTP roaming via SMTP-submission (port 587)
- POP3, POP3-SSL
- IMAP, IMAP-SSL (Courier IMAP)
- CGI frontend to mail features
- Log processing and pretty graphs (via RRDutil)
- Auto-Installs of MySQL, Apache, phpMyAdmin, and more
- Centralized configuration files
- Support for clusters of qmail servers
- Builds SSL certs for Apache, Qmail, & Courier
Security - Mail::Toaster supports secure connections from the email client (via POP3, IMAP, SMTP, and webmail) to the server. If the remote (destination) email server supports it, we also encrypt the email as it travels across the public Intenet from server to server. Thus, if you happen to be using two Mail::Toasters and your email clients are configured to use SSL, you have a fully encrypted path from the email sender to the final recipient.
State of the Art Filtering - Mail::Toaster has sophisticated filtering capabilities built right in. A default installation blocks all viruses and will detect 85% of the spam. With a little bit of training, its reasonable to expect and achieve 99% spam filtering accuracy.
Flexibility - Mail::Toaster provides an extremely flexible framework to allow you to build your email system your way. This flexibility makes it easy to migrate existing systems to Mail::Toaster and also allows Mail::Toaster to work in diverse environments and OS platforms.
Support - There is a thriving and active support community available on the mailing list. The web forums are also frequented by quite a few helpful folks. If you need more support than folks are willing to provide, commercial support is available.
Enhancements:
- Primarily code quality improvements.
- Rewrites of major portions of the code using techniques described in Perl Best Practices.
- Many more tests, much better tests, and more error testing within the functions.
- A new Webmail interface.
- Its not terribly "pretty" yet, but is much more user friendly and functional.