Latest News

  • 2008-05-10: The fourth release candidate for IMP Webmail Client H3 (4.2-RC4) has been released.
  • 2008-01-22: The IMP Webmail Client H3 (4.2-RC2) has been released.
  • 2006-08-17: Support for symmetric PGP encryption has been added, you can now encrypt messages only with a password without exchanging PGP keys beforehand. This feature has been sponsored by Swiss Khamsa SA and appears in IMP 4.2.
  • 2006-05-17: The dynamic address expansion and spell checker have been "backported" from DIMP to IMP and will be released with IMP 4.2. More details and screenshots are available on Jan's Blog.
  • 2006-03-06: The IMP Webmail Client H3 (4.1) has been released with many new features and improvements, e.g. virtual inbox and trash folders, stationery and form responses, audio notifications, automatic namespace detection, Hebrew and Khmer translations, and many more. Read the release announcement for details.

Stable Releases

Development Releases

IMP Webmail Client

Versions: 4.1 | 4.0 | 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 4.1.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 many 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. As with IMP 2.2 before it, it passes the "MIME Torture Test" that UW makes available.

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