SquirrelMail, a pure PHP web based mail client

First released in 1999, SquirrelMail is now one of the most complete and powerful webmail solution, independant of the mail server side.

SquirrelMail is written in PHP and use as little as possible of JavaScript to increase the browser compatibility. This solution will talk with merely all mail servers you can imagine, as it simply requires IMAP4 to talk to a message store and SMTP to send mail. Of course, secure version of these protocols (using SSL, Digest or other mecanisms) are supported.

Build around an architecture that allows numerous plugins to be developped and incoporated to the core without the need of great change in it, it has proven to be one of the most extensible platform when building a webmail solution for end-users. Among the useful features, we can note :

• use of LDAP directory to lookup email adresses
• use of multiple identities to sent mail
• reply to a mail sent to one of your identity using the corresponding identity
• display of mailbox quota information, even if your server is managed thru cPanel
• plugin to add the functionality of a shared agenda
• filters and coloring of message based on self-made rules
• personal adress book
• and many more ...

More information on the site of SquirrelMail