IMP is the Internet Messaging Program. It is written in PHP and provides webmail access to IMAP and POP3 accounts.
There are currently three branches of IMP. IMP 4.0 is the current production version of the stable branch. It requires PHP 4.3.0 and version 3.x of the Horde framework. IMP project adds new features like crypting support, flexible charset handling, virtual folders for saved searches, a WYSIWYG editor for creating HTML messages, improved MIME message handling, and many more.
IMP 3.2.7 is the current production version of the previous stable branch. It requires PHP 4.1.0 and version 2.0 of the Horde framework. It adds advanced features such as searching multiple mailboxes, identities, and a hierarchical mailbox navigator, as well as a cleaner, redesigned user interface. As with IMP 2.2 before it, it passes the "MIME Torture Test" that UW makes available.
IMP 2.2 is the previous stable branch, now obsolete. It used PHPLIB for session management, and worked with both PHP3 and PHP4. Version 2.2 is no longer actively developed; please see the IMP 2.2 page for more details on known security problems in the last version released. The Horde Project strongly urges sites still running IMP 2.2 to upgrade to 3.x as soon as possible.
What's New in This Release:
· A server configuration option to limit the number of login attempts has been added.
· A link to view attached S/MIME key details has been added.
· Escaping of folder names has been fixed.
· Catalan, German, and Slovenian translations have been updated.
· Several small bugfixes and improvements have been made.