Free linux webmail server software for linux

The Linux Virtual Server is a highly scalable and highly available server built on a cluster of real servers, with the load balancer running on the Linux operating system.

The architecture of the server cluster is fully transparent to end users, and the users interact as if it were a single high-performance virtual server.

The basic goal of the Linux Virtual Server Project is to:
- Build a high-performance and highly available server for Linux using clustering technology, which provides good scalability, reliability and serviceability.

Ubuntu Linux is a complete desktop Linux operating system, freely available with both community and professional support.

The Ubuntu team is proud to announce Ubuntu 5.10 Server, the first release of Ubuntu designed especially for server environments.

Like the standard desktop Ubuntu, it occupies a single CD. However, it is distinguished by the following features:

* Includes server-oriented kernels with out-of-the-box automatic support for multiprocessor systems
* Includes a wide variety of popular server applications such as apache, mysql, postgresql, php, zope, openldap, bind, samba, all on the single CD, ready for installation
* A slim default installation, occupying just 400 megabytes: add only the software you need, for a clean, maintainable configuration.
* Provides no desktop environment (GNOME, KDE, etc.) by default
* Safe and text-oriented boot mode for better clarity and infinite justice on boot.

The default installation is secure by design, with no network ports active after installation and access to free security updates activated. Network services are activated only when explicitly installed.

As always, its supported with regular releases, a commitment to security updates for 18 months after each release and professional technical support from many companies around the world.

Dwarf Mail Server is a full-featured mail server developed on the Java platform, implementing SMTP, POP3 and IMAP4rev1 protocols.
Dwarf Mail Server provides support for rich application message processing via pluggable mail filters and agents, as well as full handling of virtual domains for the SMTP/POP3/IMAP4 protocols, and is free of charge for the binary redistribution.
Since the server is based on the Dwarf framework, it also shares its common design principles and features - simplicity, high modularity and extensibility, authentication and authorization, XML-based configuration, logging and remote management.
Main features:
- ESMTP, POP3 and IMAP4rev1 implementation
- application logic layer provided by mail filters and agents
- virtual mail hosts in SMTP/POP3/IMAP4 server
- application-independent authentication and authorization
- sample JSP-based webmail interface
Dwarf Mail Server is targeted for both end users who are just looking for simple, secure and robust mail server as well as developers who need an extensible and powerful framework for application message processing.
For users with minimal requirements it can offer portability, simple configuration as well as strong security.
- Portability: several OS platforms are supported via the Java technology, including MS Windows, UNIX/Linux/BSD, MacOS X and others.
- Configuration: just 3 lines have to be changed to fire up a sample mail server and a few of them to run a full featured SMTP/POP3/IMAP4 server.
- Security: it uses Java Platform Security Architecture in combination with Java Authentication and Authorization Service (JAAS), as well as SSL/TLS for the secure communication.
Advanced or enterprise users can additionally appreciate performance scalability, multiple domain handling, enhanced security features and modular design easing to incorporate it to the existing infrastructure.
- Scalability: gaining from multithreaded design and dynamically adjustable allocation of resources.
- Multiple domains: server is able to handle multiple virtual domains in a single instance for all SMTP, POP and IMAP protocols.
- Enhanced security: includes subject-based permissions and access control lists for IMAP, SMTP relaying control rules, host-based filtering, SSL/TLS communication, basic anti-spam filtering, etc.
- Robustness: client/server network communication is by design separated from the resource-expensive application logic layer. The server implementation is based on the unparsed byte streams whenever possible, including its own and highly efficient MIME parser.
Dwarf Mail Server also appears to be a suitable platform for application development and customization. Its modular structure and lightweight API allows enhancing existing functionality or completely exchanging the certain part as a whole:
- Message processing: mail filters and agents provide an unique infrastructure for rich message processing.
- Mail queue: physical mail queue representation is abstracted by the API specification and may replaced by a custom implementation.
- Storage subsystem: physical data representation (i.e. messages, folders, configuration options, ACLs) is abstracted by API and may be replaced by a custom implementation based on filesystem, SQL database, etc.
- MIME parser: the parsing engine may be reimplemented for the top efficiency according to the currently used mail storage.
Dwarf Mail Sever has been tested with the most popular mail clients like MS Outlook, Mozilla, Thunderbird, Opera, Apple Mail, Becky!, Pegasus, Eudora, Pine, The Bat! and others.
Other features:
- multi-threaded server
- dynamically adjusted number of active threads
- server API for mail, user data and ACL storages
- robust SMTP server architecture with flexible queue design
- simultaneous deliveries to remote SMTP hosts
- transparent Delivery System Notification (DSN) mechanism
- support for shared mail folders
- fast and universal stream-oriented MIME parser
- runtime server configuration
- built-in SSL/TLS support
- full documentation with user guides and tutorials
- samples with source code

Wombat Linux Server is a port of Linux that runs as an application on top of L4/Iguana.

This package is not really intended to be used standalone. It is best to download it as part of the Iguana project.

Yukatan Webmail provides an advanced email management system.
The goal of the project is to create an advanced webmail system, that uses a relational database backend to provide efficient search and classification capabilities.
The project is currently in pre-alpha state. The underlying data model has just reached 1.0 status, and a couple of utility tools are under active development.
Yukatan components
The Yukatan webmail system is developed as a collection of independent components based on a central data model.
Enhancements:
- Yukatan data model 1.0
- Java importer sources
- Initial webapp code for the webmail part

HELIOS PS3 Linux Server is a customized version of the Yellow Dog Linux for PlayStation3 gaming console.
The PS3 GameOS offers entertainment features such as video games, movies, and photos, and HELIOS simplified Yellow Dog Linux adds a powerful server OS. Together they provide a unique combination of entertainment and server system. Dedicated to making good things even better, HELIOS Software has prepared a stripped down version of Yellow Dog Linux for the purpose of providing a lightweight, low overhead server environment on the PS3, while offering an exciting test-drive platform for its file, print, PDF and image server software.
The HELIOS simplified YDL distribution comes on a CD disk image that installs in less than 6 minutes, and provides a high performance Linux server OS complete with DHCP network settings, support for Java 1.5 and AppleTalk enhanced kernel.
Main features:
- Free download from HELIOS web site
- Easy installation, ready to run in a few minutes
- Excellent Linux on PS3 documentation from HELIOS
- Dedicated server operating system with optimized performance (40% more memory available)
- Java 1.5 runtime is pre-installed
- Easy maintenance shell from CD
- HELIOS services are pre-installed as a test-drive
For Installation instruction and a nice video review, please go at the following link:
AVAILABLE IN A FEW MINUTES!
HELIOS on the PlayStation3: Installation and First Impressions
To download this file, you ave to login to the HELIOS server http://webshare.helios.de with the user tools and password tools, then you need to go the "HELIOS Linux for PS3" folder, select the "HELIOS Linux for PS3 v1.iso" file and click the Download button.

RoundCube Webmail is a browser-based multilingual IMAP client with an application-like user interface.
RoundCube Webmail provides full functionality you expect from an e-mail client, including MIME support, address book, folder manipulation and message filters. RoundCube Webmail is written in PHP and requires the MySQL database. The user interface is fully skinnable using XHTML and CSS 2.
Main features:
- Multilingual capabilities
- Full support for MIME and HTML messages
- Compose messages with attachments
- Multiple sender identities
- Basic address book
- Find-as-you-type address book integration
- Create or remove custom message folders
- Built-in caching for fast mailbox access
- Support for external SMTP server
- Advanced user interface
- Unlimited users and messages
- Complete customization with skins
Enhancements:
- This release has a stable core and a new message parser (less memory consuming).
- It works with PHP safe_mode and creates valid HTML.
- It has new LDAP integration and allows you to search for contacts.