Roundcube is an open source webmail application with a slick, desktop-like interface.
It is multilingual (already comes with 60+ languages) and offers most of the functionality you can expect from a webmail like:
- full support for MIME and HTML messages
- composing messages with attachments
- find-as-you-type address book integration
- Richtext/HTML message composing
- Forwarding messages with attachments
- searching messages and contacts
- threaded message listing
- spell checking
Messages can be managed with drag'n drops, users can have multiple sender identities and it can work with unlimited users/messages.
Roundcube is built with PHP and requires MySQL, PostgreSQL, SQLite or MSSQL for storing the data.
It has a plugin API for building extensions and adding custom features.
Requirements: PHP 5.2.1+, MySQL, PostgreSQL, SQLite or MSSQL, IMAP & SMTP server
Xeams is a free e-mail server software that supports POP3, SMTP, IMAP & works in all major operating systems (Windows, Linux, Solaris, MacOSX).
It comes with a powerful spam engine which can stop most of them by default & lets you to customize the rules further.
The server can work in 3 modes:
- Full Email Server – no other email server is required
- Spam Wirewall – will be a layer between messages & your e-mail server
- Hybrid Mode – will both work as a mail server & block spams on your e-mail infrastructure
The server is controlled from a web-based interface which also helps you to live-monitor the system.
It has support for detailed logging, mailing lists, customized footers & much more.
The company also offers another free product named Synametrics Smtp Gateway which again works in multi-OS.
Synametrics Smtp Gateway can be used as a backup SMTP server which will send e-mails when the primary server fails or can be used to load-balance outgoing messages.
Requirements: No Requirements
Compatibility: All Major Operating Systems
conjoon is a web-based open source application, built with the Zend Framework, that focuses on message exchanging.
Currently, it is a full-featured webmail & RSS reader client with contacts management. But the upcoming releases show that it will also have an integrated Twitter client with multiple accounts support.
Thanks to Ext JS, the application has a slick desktop-like interface with tabs, drag'n drops & more.
It comes with a web-based installer & requires PHP/MySQL to run.
Requirements: PHP 5.2.5+, MySQL 5+
Compatibility: All Major Browsers (ecept IE6)
XMail Server Lite is an open source & free mail server with an Ajaxed webmail bundled to it.
It is compatible with Window & Linux OSs with 2 different installers provided.
The server is capable of managing SMTP/ESMTP & POP3 protocols with web-based administration panel.
It supports unlimited domains/users including virtual domains & aliases.
XMail Lite also offers anti-virus integration, bayesian filters (for spam protection) & a logging functionality of all the activities.
The Webmail Lite can display folders/nested folders, has an address book, multilingual & much more.
Tip: The webmail can be downloaded & installed as a standalone product too (from here).
Requirements: Windows or Linux OS
T-dah is a free PHP webmail application which is built from the well-known Uebimiau script & offers a slick interface.
It can be up & running in a few minutes on any PHP (4 or 5) enabled server as no database is required.
The application uses the POP3 protocol & can be configured to use SMTP, PHP mail, Sendmail or Qmail for sending e-mails.
T-dah comes with several modules like:
- event calendar
- group chat
- addressbook
- folder management
It uses TinyMCE WYSIWYG editor for creating new e-mails, has an integrated search & can be translated into any language with the "language files" support.
Requirements: PHP
Compatibility: All Major Browsers
6zap is an open source communication platform with e-mail, calendar, file management and contacts management.
The application comes in 3 flavors:
- Hosted version
- Downloadable version for installing it to any server
- Hosting it in the cloud with the pre-configued Amazon-AMI
The e-mail module is similar to Outlook, a slick three-pane interface (that can also work offline) with auto-save, drag’n drop & spelling features.
Calendar module offers both shared & private usage that supports recurring events, multiple views (day, week, month..).
The application has a file management module that offers a desktop-like experience. Files & folders can be added, renamed, deleted easily.
Contacts module is again very similar to Outlook & yoıu can reach it from the other parts of the application like the calendar or e-mail.
There is also a feature named Zcount, that makes subscribing & logging to the other websites/applications easier. It auto-creates an e-mail alias for subscription to offer a better spam protection.
To sum up, 6zap is a promising product that can be handy for:
- service providers for offering it to their customers
- individuals for almost instantly installing & using such a communication platform
Requirements: PHP & MySQL
Hastymail is a free IMAP webmail software (open source) built with PHP.
The application is lightweight, has a clean interface & compatible with all major browsers including mobile ones.
With its plugin support, new features can be added. Some available plugins are: calendar, filtering, RSS/Atom.
Hastymail can be customized via CSS & has a PHP based template system.
It has Vcard based contact list with multiple import/export ability & many other features.
Requirements: PHP
Xuheki is an open source IMAP client with an Ajaxed interface.
It looks-feels like a desktop application & supports multiple IMAP servers/identities.
It uses the Net::IMAP::Client Perl module as the IMAP engine & built with DynarchLIB Ajax Toolkit.
Some features of Xuheki:
- Supports multiple folders with drag’n drop
- It can stay connected to an IMAP server
- Interface allows you to do multiple things once
- Multiple user support
- Contact list & more..
It requires Perl & MySQL 5 to run.
Requirements: Perl 5.8+, Apache 2+,mod_perl 2+,MySQL 5+
Compatibility: IE can have problems (not well tested)
AtMail Open Source is an open source webmail client written in PHP.
This lightweight Ajaxed webmail client has a simple to use interface and can be used with existing IMAP mailservers.
Features of this free webmail client:
- Lightweight Ajax Webmail Interface
- Video Mail
- PHP source code
- IMAP support
- Live Spell Check
- Address Book
Requirements: PHP
Compatibility: IMAP Mailservers
Claros, which is a passionate team in creating open source software, has a beautiful software named Claros inTouch.
Clasor InTouch is an ajax communication suite with key features such as webmail, address book, post-it notes, calendar (in progress), webdisk (in progress), built-in instant messenger and RSS reader. It is the first open source web application which features built in spam protection and instant messaging capabilities together with web 2.0 technologies.
It is built with Java, utilizes JSP/Servlets with the well known J2EE technologies & uses MySQL database.
Claros inTouch is more than a free webmail software with a slick interface & usability.
It is offered under GNU which makes this communication suite software totally free.
Requirements: Tomcat For JSP & MySQL
