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

IMP is currently at version 5 and requires Horde 4. It adds new features like a new mobile frontend for smartphones, much improved AJAX frontend with new vertical layout, entirely new IMAP library with broad RFC support and huge performance gains, HTML signatures, more powerful search and filters, and much more. With IMP 5, the DIMP and MIMP applications are now entirely contained within IMP.

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

Core features

• Mobile smartphone view
• HTML message composition with a cross-browser WYSIWIG editor
• HTML signature
• Passes "MIME Torture Test" and "E-Mail Acid Test"
• High performance
• Perfect IMAP support
• Flexible message search
• Address autocompletion
• Spell checking
• Sending of attachments via download link
• Thread view
• Message previews in mailbox view
• Desktop like user interface and navigation (also via keyboard)
• IMAP folder support
• Management of shared IMAP folders
• Folder subscriptions
• Various identities
• Alias and "tied to" addresses in user identities
• Integration with e-mail filter
• Integration with adressbook
• Integration calendar
• S/MIME and PGP based encryption as well as signatures
• Mailbox quotas
• Ability to forward multiple messages at once
• Download of attachments as ZIP archive
• Stripping of attachments from messages
• Preview of attachments in compose view
• Priority settings for composed messages
• Message flags
• Graphical emoticons and country flags in message view
• Available in many languages
• Full charset support in folders, mailbox, message and compose views

Related Resources

Turba contact manager
Ingo filters manager
Gollem file manager
Kronolith calendar module
Sork account management modules (Passwd, Vacation, Forwards)