View source for Internet Messaging Program

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{{Notability|Products|date=January 2012}}
{{primary sources|date=January 2012}}
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{{Infobox software
| name =                   Internet Messaging Program (IMP)
| logo =                   [[Image:Horde.svg|88px|center]]
| caption =                Create. Communicate. Collaborate.
| developer =              [http://www.horde.org/about/team/ The Horde Core Team]
| released =               {{Start date and age|1998}}
| latest release version = {{wikidata|property|preferred|references|edit|Q477979|P348|P548=Q2804309}}
| latest release date    = {{wikidata|qualifier|preferred|single|Q477979|P348|P548=Q2804309|P577}}
| latest preview version = {{wikidata|property|preferred|references|edit|Q477979|P348|P548=Q51930650}}
| latest preview date    = {{wikidata|qualifier|preferred|single|Q477979|P348|P548=Q51930650|P577}}
| operating system =       [[Cross-platform]]
| programming language   = [[PHP]]
| language =               English, German and many others (multilingual)<ref>{{cite web|url=http://www.horde.org/community/localization|title=Horde localization|publisher=www.horde.org|access-date=2012-01-31}}</ref>
| genre =                  [[Webmail]]
| license =                [[GNU General Public License|GPL-2.0-only]]
| website =                {{URL|https://www.horde.org/apps/imp}}
}}

The '''Internet Messaging Program''' or '''IMP''' is a [[webmail]] client. It can be used to access e-mail stored on an [[IMAP]] server. IMP is written in [[PHP]] and a component of the [[collaborative software]] suite [[Horde (software)|Horde]].

It is included with [[cPanel]] and [[Plesk]] installations as a webmail client. It often integrates [[email]], [[calendar]], [[address book]], notes, tasks, [[mail filter|filter]]s and a [[News client|newsreader]] with cPanel.

Internet Messaging Program is [[free and open-source software]] subject to the terms of the [[GNU General Public License|GPL-2.0-only]] license.

== Features ==
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*    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

==History==
Chuck Hagenbuch published a first version of IMP on [[Freshmeat]] in 1998.<ref>{{cite web|url=http://www.horde.org/papers/oscon2001-case_study/|title=Horde case study|publisher=www.horde.org|access-date=2012-01-21}}</ref> A constant stream of feature requests not all fitting for a webmail application led to the development of a more generic [[web application]] backbone: the [[Horde (software)|Horde framework]]. The release of IMP 3.0 and Horde 2.0 was the first one with two truly separate components.<ref>{{cite web|url=http://marc.info/?l=horde-dev&m=101003795801512&w=4|title=Horde-2.0 release|publisher=marc.info|access-date=2012-01-21}}</ref> Since then any deployment of IMP can only run on top of a Horde installation.

SAPO uses IMP<ref>{{cite web|url=https://codebits.eu/Ghunti|title=Horde powering portugalmail.pt|publisher=codebits.eu|access-date=2012-01-21|url-status=dead|archive-url=https://web.archive.org/web/20120128114924/https://codebits.eu/Ghunti|archive-date=2012-01-28}}</ref> to provide several million users with a webmail platform.<ref>{{cite web|url=http://janschneider.de/consulting.support/references|title=Horde developer supports SAPO|publisher=janschneider.de|access-date=2012-01-21}}</ref> The company also sponsored the initial development of the dynamic [[AJAX]] variant of IMP<ref>{{cite web|url=http://janschneider.de/news/25/252|title=SAPO sponsors dynamic webmail|publisher=janschneider.de|access-date=2012-01-31}}</ref> which was released as a separate package - named DIMP - with the release of Horde 3.2.<ref>{{cite web|url=http://janschneider.de/news/5/322|title=Horde 3.2 and DIMP 1.0 release|publisher=janschneider.de|access-date=2012-01-31}}</ref><ref>{{cite web|url=http://ajax.phpmagazine.net/2006/02/imp_webmail_with_ajax_dimp.html|title=Development of DIMP 1.0|publisher=phpmagazine.net|access-date=2012-02-01|archive-url=https://web.archive.org/web/20120203231157/http://ajax.phpmagazine.net/2006/02/imp_webmail_with_ajax_dimp.html|archive-date=2012-02-03|url-status=dead}}</ref>

Support for mobile clients was provided within 2006 for the first time. At that time a WAP based mobile view was provided by a separate package called MIMP.<ref>{{cite web|url=http://lists.horde.org/archives/announce/2006/000283.html|title=MIMP 1.0 release|publisher=horde.org|access-date=2012-01-31}}</ref>

With the release of Horde 4.0 the three existing views were collapsed into the original IMP package again. In addition another mobile view for smartphones was added based on the [[jQuery Mobile]] [[JavaScript]] framework.<ref>{{cite web|url=http://log.pardus.de/2010/11/screenshots-of-new-horde4-mobile-portal.html|title=Development of the Horde smartphone views|publisher=log.pardus.de|access-date=2012-01-31}}</ref><ref>{{cite web|url=http://www.techworld.com.au/article/382641/open_source_horde_groupware_reaches_version_4/|title=News coverage of the Horde smartphone views|publisher=techworld.com.au|access-date=2012-02-01|archive-date=2012-02-02|archive-url=https://web.archive.org/web/20120202224218/http://www.techworld.com.au/article/382641/open_source_horde_groupware_reaches_version_4|url-status=dead}}</ref>

== See also ==
* [[Horde (software)|Horde]]
* [[SquirrelMail]]
* [[RoundCube]]

==References==
{{reflist}}

== External links ==
* {{Official website|www.horde.org/imp/}}

{{E-mail clients}}

[[Category:Email clients]]
[[Category:Web-based email clients for Linux]]
[[Category:Free email software]]
[[Category:Free software programmed in PHP]]
[[Category:Free software webmail]]
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