Last Updated on: 3rd December 2023, 12:54 pm

Web site:
Category: Network
Subcategory: Email Clients
Platform: Cross-platform
License: GPL
Interface: Web
First release: 1998

IMP – an Internet Messaging Program written in PHP and provides webmail access to IMAP and POP3 accounts. It uses the best-of-class Horde/Imap_Client library to provide fast, robust connections to the remote IMAP/POP3 server. IMP provides multiple view types to support all possible browsers (desktop vs. mobile vs. tablet vs. text only).

IMP passes both the MIME Torture Test and the newer E-Mail Acid Test, ensuring that messages are displayed as intended by the original sender.

– Dynamic (AJAX) view
– Mobile smartphone view
– Minimal (text-only) view
– HTML message composition with a cross-browser WYSIWYG editor
– Drag/drop attachment support into WYSIWYG editor
– HTML signatures
– High performance
– Robust IMAP support, utilizing advanced server features
– Flexible message search
– Address autocompletion
– Spell checking
– Sending of attachments via download link, instead of embedding in message
– Thread view
– Message previews in mailbox view
– Desktop like user interface and navigation (also via keyboard)
– IMAP folder support
– Management of shared IMAP folders (ACLs)
– Folder subscriptions
– Various identities
– Alias and “tied to” addresses in user identities
– Integration with e-mail filtering
– Integration with addressbook
– Integration with calendar
– S/MIME and PGP based encryption and 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

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