Squirrel Mail
SquirrelMail 1.5.0-2 is the current version. It was installed May 08, 2006. SquirrelMail is a standards-based webmail package written in PHP 5. It includes built-in pure PHP support for the IMAP and SMTP protocols and all pages render in pure XHTML 4.0 (with no javascript required) for maximum compatibility across browsers. SquirrelMail is the recommended choice for our customers.
We have installed many plugins that have been installed to make SquirrelMail the best and easiest that it can be. Below is a short list of a few of the plugins we have installed. Screenshots are available
click here.
Use fetchmail to get mail from other pop accounts.
While filling in your To/Cc/Bcc fields, this plugin searches your local address book and will automatically fill in the rest of the nickname/email address. Supports only IE 5+. Future version will work with Mozilla browsers
Lists folders with message count & size.
Provide a ‘Select Range’ link. Allows your users to quickly select many messages in a folder instead of manually selecting them one by one. If you apply an included patch, your users will also be able to multi-select addresses from the address book.
Adds flag buttons and adds icons to show new/read/reply/delete/flagged/attachment/priority status
Adds flag buttons and adds icons to show new/read/reply/delete/flagged/attachment/priority status
Store all your most recent contact in an easy to use address book.
Facilitates the importing of address book data from other mail programs.
This plugin allows your users to set vacation/autoresponder message.
Logs user activity to a MySQL database.
Offers a Backend for storing global AddressBook in a MySQL Database rather a file.
Display graphic images on the top menu bar instead of plain text.
Allows the user to move all messages from one folder to another without having to select the messages.
Lists folders with message count & size.
Use fetchmail to get mail from other pop accounts.
While filling in your To/Cc/Bcc fields, this plugin searches your local address book and will automatically fill in the rest of the nickname/email address. Supports only IE 5+. Future version will work with Mozilla browsers
Lists folders with message count & size.
Provide a ‘Select Range’ link. Allows your users to quickly select many messages in a folder instead of manually selecting them one by one. If you apply an included patch, your users will also be able to multi-select addresses from the address book.
Adds flag buttons and adds icons to show new/read/reply/delete/flagged/attachment/priority status
Adds flag buttons and adds icons to show new/read/reply/delete/flagged/attachment/priority status
Store all your most recent contact in an easy to use address book.
Facilitates the importing of address book data from other mail programs.
This plugin allows your users to set vacation/autoresponder message.
Logs user activity to a MySQL database.
Offers a Backend for storing global AddressBook in a MySQL Database rather a file.
Display graphic images on the top menu bar instead of plain text.
Allows the user to move all messages from one folder to another without having to select the messages.
Lists folders with message count & size.
Adds a dropdown to the compose form to specify where to save the sent message.
Horde
IMP is the Internet Messaging Program. It is written in
PHP 
and provides webmail access to IMAP and POP3 accounts.
IMP H3 (4.0.4) 
is the current version and was installed November 1 2005. It requires PHP 5 and version 3.x of the Horde framework. It adds new features like crypt support, flexible charset handling, virtual folders for saved searches, a WYSIWYG editor for creating HTML messages, improved MIME message handling, and much more.
The Horde Project is about creating high quality Open Source
applications 
, based on PHP and the Horde Framework.
Currently Horde Project boasts
many applications 
, some already enterprise-ready and deployed in demanding
environments 
, and some exciting new ones still in development.
This webmail client will offer additional features over SquirrelMail, but load time is increased as a result.