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On the recordRead 12 Oct 202616 facts
Horde IMP
Plans and prices
IMP
Free
Open source webmail application; requires a Horde installation and an IMAP or POP3 server
Read 12 Oct 2026 · horde.org
On the record
- App coverage
- webhorde.org · read 23 Sep 2026
- Browser views
- It provides dynamic, mobile, basic, and minimal text-only interfaces for different browsers and devices.horde.org · read 12 Oct 2026
- Calendar tools
- Yeshorde.org · read 23 Sep 2026
- Composition
- Features include HTML composition with a cross-browser WYSIWYG editor, HTML signatures, and drag-and-drop attachment support.horde.org · read 12 Oct 2026
- Encryption
- IMP supports S/MIME and PGP-based encryption and signatures; OpenSSL is required for S/MIME and for TLS or SSL connections to mail servers.horde.org · read 12 Oct 2026
- Installation
- The guide recommends installation through PEAR and also documents installation from Git for development code or unreleased fixes.horde.org · read 12 Oct 2026
- Integrations
- The feature list names integration with Horde's Ingo email filtering, Turba address book, and Kronolith calendar applications.horde.org · read 12 Oct 2026
- Mailbox management
- It supports IMAP folders, shared-folder ACL management, folder subscriptions, multiple identities, and mailbox quotas.horde.org · read 12 Oct 2026
- Mail tools
- Features include flexible message search, address autocompletion, spell checking, thread view, mailbox previews, and forwarding multiple messages at once.horde.org · read 12 Oct 2026
- Open source
- The project describes IMP as OSI Certified Open Source Software.horde.org · read 12 Oct 2026
- POP3 limit
- With POP3, on-demand filtering, searching, and sorting are disabled, and the POP server must support UIDL.horde.org · read 12 Oct 2026
- Prerequisites
- IMP requires a working Horde installation, PHP file-upload support, at least one IMAP or POP3 server, and Sendmail or an SMTP server.horde.org · read 12 Oct 2026
- Purpose
- IMP is a PHP webmail client that provides browser access to IMAP and POP3 accounts.horde.org · read 12 Oct 2026
- Security configuration
- The installation guide recommends SSL for browser-to-web-server traffic and TLS or a private network for web-server-to-mail-server traffic; TLS is the default mail-server connection configuration described there.horde.org · read 12 Oct 2026
- Support
- The project points users to its FAQ, application mailing lists, and occasional IRC support from Horde developers, contributors, and users.horde.org · read 12 Oct 2026
