IMP, the robust Internet Messaging Program powered by PHP, have just released version 4.2 in the Hord 3 branch. In addition to accessibility compliance, the new release include many new features and improvements :
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  • Mailbox and message caching.
  • A rewrite of many of IMP’s core libraries.
  • WCAG 1.0 Priority 2/Section 508 accessibility guidelines compliance.
  • Javascript improvements/increased functionality.
  • Multiple browser windows now works.
  • Sent mail logging.
  • Customizable rate limiting, non-modifiable folders, and maximum inline display size.
  • Symmetric PGP encryption and PGP public key fetching from keyservers.
  • Auto-completion of contact list searching in the compose screen.
  • RSS/Atom mailbox feeds.
  • IDN support.
  • Greatly improved PHP memory usage, better caching, and more efficient IMAP server interaction.

More information and download about IMP from http://www.horde.org/imp/. IMP 4.2 H3 could be downloaded directly from Horde ftp.
In addition to IMP, the enterprise ready browser-based communication suite by Horde have just released version 1.1. Horde Groupware Webmail Edition allow users to read, send, and organize email messages and manage and share calendars, contacts, tasks, and notes with the standards compliant components from the Horde Project.


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Version 1.1 of Horde Suite include include :

  • AJAX and mobile Web mail clients.
  • A central alarm system with several notifications.
  • Performance improvements.
  • New themes. Accessibility standards compliance.
  • Email rate limiting.
  • Symmetric PGP encryption.
  • Auto-completion for contact searches.
  • Mailbox feeds, IDN support, timed vacation messages, SQL filter storage, and virtual address books.
  • An improved default address book schema.
  • Favorite recipients address books.
  • Daily agenda email messages.
  • More recurrence types.
  • Holidays in the calendar.
  • Event delegation.
  • Private events and tasks.
  • Sub-tasks and task start dates.
  • Saving notes as PDF.
  • Encrypted notes.

Horde Groupware Webmail Edition bundles the separately available applications IMP, Ingo, Kronolith, Turba, Nag, and Mnemo. It can be extended with any of the released Horde applications or the Horde modules that are still in development, like a file manager, a bookmark manager, a forum, or a wiki.
The new releases came under the branch 3 of the Horde Application Framework which include many features and performance improvements in addition to accessibility guidelines compliance.
More information from http://www.horde.org/