Latest News

  • 2009-12-15: The development of IMP 5.0 has reached bug fixing mode. There will probably still be added a few more features before the final release, but most work is going into fixing bugs and finishing Horde 4, the groundwork of IMP 5.
  • 2008-09-26: The final release of the IMP Webmail Client H3 (4.3) is available
  • 2008-07-10: A feature to attach personal contact information to outgoing messages has been added and will be available with IMP H3 (4.3).
  • 2008-06-30: The folder list generation has been much improved and sped up. These changes should also fix some namespace issues that some people have seen with Courier and Dovecot servers.
  • 2008-06-27: A mailto: handler for Firefox 3 has been added for IMP H3 (4.3). This handler can be installed similar to a Firefox extension and makes the browser opening IMP's compose window when clicking a linked email address in any webpage.

Stable Releases

Development Releases

Open Requests

IMP Webmail Client

Versions (stable branch): 4.3 | 4.2 | 4.1 | 4.0
Old Versions: 3.2 | 3.1 | 3.0 | 2.2

IMP is the Internet Messaging Program. It is written in PHP and provides webmail access to IMAP and POP3 accounts.

There are several current branches of IMP. IMP 4.3.x is the current production version of the stable branch. It requires PHP 4.3.0 and version 3.x of the Horde framework. It 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 much more.

IMP 3.2.8 is the latest 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.

All versions of IMP since 2.2 pass the "MIME Torture Test" that the University of Washington makes available.

Feel free to view (or add) documentation on IMP on the IMP Wiki Page.

Related Resources

Gollem file manager
Ingo filters manager
Kronolith calendar module
Turba contact manager
SORK account management modules (passwd, vacation, forwards)

Dynamic IMP - IMP with an AJAX-ified user interface
Mobile IMP - IMP for mobile browsers