Open Source PHP Email Clients

SquirrelMail is a PHP-based Web email client. It includes built-in pure PHP support for IMAP and SMTP, and renders all pages in pure HTML 4.0 for maximum compatibility across browsers. It has strong MIME support and a flexible plugin system.

A PHP email creation and transport class featuring file attachments, SMTP servers, CCs, BCCs, HTML messages, word wrap, and more. Sends email via sendmail, PHP mail(), QMail, or with SMTP. PHPMailer is used by many popular PHP development frameworks and is one of the most popular email-generating and sending libraries in the world. This project is defunct here on sourceforge – it's now maintained on Github at https://github.com/PHPMailer/PHPMailer. Documentation is available at https://github.com/PHPMailer/PHPMailer/wiki

NOCC is a simple and fast Webmail client which can handle POP3 and IMAP mailboxes and sends email via SMTP. It is written with PHP, has low requirements (no database, frames). Features multi-language support, MIME attachments, displays HTML messages. The installation guide comes with the source code: https://sourceforge.net/p/nocc/code/HEAD/tree/trunk/webmail/docs/INSTALL If you encounter problems or bugs you can always try the current HEAD version: https://sourceforge.net/p/nocc/code/HEAD/tarball?path= Questions, bug reports or support requests are very welcome: https://sourceforge.net/p/nocc/_list/tickets Alternative source code repository: https://github.com/oheil/NOCC

RainLoop Webmail is a modern, fast, and lightweight web-based email client. It supports IMAP and SMTP protocols, allowing users to access and manage their email accounts through a web interface. RainLoop offers features like multi-account support, a responsive UI, and integration with popular email providers. It is self-hosted, giving users control over their email data.

SaltOS is a Business Management solution 100% Cloud Computing. It integrates features like CRM (Customer Relation Management) and ERP (Enterprise Resource Planning). Moreover is it licensed as 100% free software GPL-3.0.

AfterLogic WebMail Lite PHP is a free AJAX webmail application. Users can receive, view, manage, compose, and send email through web interface (IMAP and SMTP supported). Source code included.

Bulk Newsletter Platform(BNM) provides the components necessary to send bulk email in HTML format. BNM is written in PHP and it is appropriate to work either standalone on a server or embeded in an existent website. It is an easy to use, marketing tool which allow the user to create and send massive advertisements and newsletters in HTML to his mailing list.

s4u -software for you - enables interoperability from different PDA's with different hosts

AtMail is an open source webmail client written in PHP. We aim to provide a elegant Ajax webmail client for existing IMAP mailservers, with less bloat and a focus on an intuitive, simple user interface.

MadMail is a simple Webmail client which can handle POP3, SMTP, and IMAP servers. It is written with PHP (Sessions) an can displays HTML messages and MIME attachments. Features multi-language support No Database required

Modest system requirements, decent performance, simple installation and upgrade, no database required - all these make RainLoop Webmail a perfect choice for your email solution.

Mail8 is a simple webmail application written in PHP which can be used and integrated in any Email Server supporting IMAP protocol.

Touch Mail is a webmail system tuned for the Iphone/Ipod Touch. With Touch Mail you can use any email service like Yahoo! Mail, Gmail, AOL that provides the POP protocol access. Written in PHP5 does not require any database support.

6XMailer is a PHP POP3 mail reader with support for HTML mail, MIME attachments, embedded mail content, multilingual ready, and themes. It has an address book and centralized configuration file.

AVA SBS is a collaboration of Open-Source software designed to give small businesses a cost effective server solution with Enterprise capabilities. AVA-SBS gives business an easy to administrate Primary Domain Controller, Print Server, File Server, Email

Webmail client for call center agents. Designed to efficiently manage and report on a large number of emails to a small number of email addresses. Specifically designed with webforms in mind where one email address may receive over 1000 emails per day.

php/MySQL based webmail program. Currently only supports pop3, IMAP is in the works. Has a notebook, a favorites organizer and an addressbook.

BasiliX is a webmail application based on PHP and IMAP, and powered by the MySQL database server. It supports simple mail actions, sending/receiving attachments, an addressbook with group capability, configurable, multiple languages and multiple folders

BlogMail software is a CMS and a Webmail application integrated in one. It's based on WordPress MultiUser and has all the functionality of this, like RSS and comments, plus support for LDAP, smarty templates, automatic subdomains and antispam filtering.

BlueMamba is a powerful, yet simple, open source PHP webmail application released under the GNU General Public License. The BlueMamba Project is going under some reorganization and is changing owners from X6 Industries to Gazood Technologies. Both co

MOX Bulk Email Sender is free and powerful bulk email sender script to create and send to your email lists. Installation: 1. extract the bulk emailer archive. 2. Upload the whole directory "emailer" to your web root directory. 3. Give the permissions 777 to the directories "emailer/lists/" and "emailer/log/". 4. Open the url "http://www.yourwebsite.com/<your web-root-directory>/php/emailer.php". 5. Now you can use the script - have fun ! Download PHP Scripts : http://microcode.ws/ Cheap Web Hosting + FREE Domain : http://goo.gl/HY7Ubq

The goal of Buoyant Mail is to provide as fully fledged of a PHP driven mail suite as technologically possible. It will look appealing (will also be themed, so any custom look can be created) and will include a calendar and address book.

The CHITTIC Trouble-Ticket- and Support-System is a Web-based Helpdesk-Application based on PHP and MySQL.

I often encountered an inability among users to think beyond SAP and MS. Goal of the project is to create a web based application management platform, which enables organisations to easily manage applications within the system.

CangrejoMail it's a mod of the popular webmail "SquirrelMail". All the html code has been changed to XHTML, this way, all the interface is handle by CSS with the possibility to work with themes.