Browse free open source C Email Clients and projects below. Use the toggles on the left to filter open source C Email Clients by OS, license, language, programming language, and project status.

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  • 1
    The continuation of the Alpine email client from University of Washington.
    Downloads: 20 This Week
    Last Update:
    See Project
  • 2
    Claws Mail
    Claws Mail is a GTK+ based, lightweight, and fast e-mail client and newsreader. Supports POP3, APOP, IMAP, SMTP, SMTP AUTH, NNTP, LDAP, multiple accounts, spell-checking, addressbook, SSL, GPG, filtering, i18n, & more. It is further extended by plugins.
    Downloads: 82 This Week
    Last Update:
    See Project
  • 3
    Enhanced packages of Mozilla products for OS/2 and eComStation.
    Downloads: 13 This Week
    Last Update:
    See Project
  • 4
    OpenChange Project

    OpenChange Project

    Microsoft Exchange compatible server and client libraries

    OpenChange is a portable Open Source implementation of Microsoft Exchange server and Exchange protocols. It provides a complete solution to interoperate with Microsoft Outlook clients or Microsoft Exchange servers. OpenChange client-side library is used in existing messaging clients and is the solution in new projects to communicate natively with Microsoft Exchange and Exchange-compatible servers. OpenChange server is a transparent Microsoft Exchange server replacement using native Exchange protocols and does not require any plugin installation in Outlook.
    Downloads: 8 This Week
    Last Update:
    See Project
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  • 5
    The venerable MH message handling system: a command-line based mail user agent for UNIX/Linux developed at the RAND Corporation and the University of California, Irvine.
    Downloads: 22 This Week
    Last Update:
    See Project
  • 6
    Note! Code and issues are maintained at https://github.com/sba1/simplemail. SimpleMail is a simple to use but powerful mail client. It supports the SMTP, POP3 and IMAP (in a simple form) protocols. Furthermore, among much other features, it is capable of showing HTML mails and can identify spam mails by using a Bayesian filter.
    Downloads: 18 This Week
    Last Update:
    See Project
  • 7
    Virtual Access Open Source Project
    The Virtual Access Foundation's Virtual Access Open Source (VAOS) is a well-established win32 mail news and collaborative conferencing tool. Modified BSD license. Please go to our homepage http://www.virtual-access.org for more information and support.
    Downloads: 12 This Week
    Last Update:
    See Project
  • 8
    evolution-kolab
    The evolution-kolab plug-in extends GNOME's PIM suite Evolution and EDS (Evolution-Data-Server) to become a full-featured Kolab 2 groupware client. Collaborate with other Kolab 2 users on emails, contacts, appointments, notes and tasks.
    Downloads: 11 This Week
    Last Update:
    See Project
  • 9
    A nice system wide software to display notifications like Growl for Mac on Windows is Snarl fullphat.net.Find here various plugins and apps which add Snarl support to different apps
    Downloads: 6 This Week
    Last Update:
    See Project
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  • 10
    ** THIS PROJECT MOVED TO GITHUB ** libEtPan ! is a mail purpose library. It will be used for low-level mail handling : network protocols (IMAP/NNTP/POP3/SMTP over TCP/IP and SSL/TCP/IP, already implemented), local storage (mbox/MH/maildir), message /
    Downloads: 6 This Week
    Last Update:
    See Project
  • 11
    Downloads: 10 This Week
    Last Update:
    See Project
  • 12
    XCmail is a MIME and multi POP3 server capable mailtool for X11 using the Xclasses layout library. XCmail was designed completely object orientated and by this may be improved easily. <p> XCmail has its own server in the internet. Take a look on it.
    Downloads: 6 This Week
    Last Update:
    See Project
  • 13
    Elmo is a feature-rich console mail client for UN*X power users. It integrates functionality commonly realised by separate pieces of software in other mailers.
    Downloads: 6 This Week
    Last Update:
    See Project
  • 14
    Draconis is a suite with several Internet Programs for the ATARI platform. It contains clients and drivers for a sucessful internet access.
    Downloads: 5 This Week
    Last Update:
    See Project
  • 15
    YAM - Yet Another Mailer

    YAM - Yet Another Mailer

    YAM - The E-mail client for Amiga computers

    YAM (short for Yet Another Mailer) is a commonly used MIME-compliant Internet mailer written for AmigaOS computers. It supports POP3, SMTP, TLSv1/SSLv3, multiple users, PGP, hierarchical folders, filters, a configurable GUI, an ARexx interface and more...
    Downloads: 5 This Week
    Last Update:
    See Project
  • 16
    Ghost In The Mail is a very basic mail client for Linux, written in C, for GTK. It supports attached files. The user can specify the SMTP server, the sender's e-mail, and the name.
    Downloads: 2 This Week
    Last Update:
    See Project
  • 17
    SimpleCheck E-Mail Notification Client
    SimpleCheck is a fast, low resource, server oriented, Windows System Tray based E-Mail Notification Client with a simple UI that regularly checks multiple POP3 E-Mail accounts. Many full client features; immune to viruses; use to delete SPAM mail.
    Downloads: 2 This Week
    Last Update:
    See Project
  • 18
    Errors Hippo is a BBS offline-reader with support for the Hippo packet format. It features a messagebase and a (hopefully) easy-to-use interface.
    Downloads: 3 This Week
    Last Update:
    See Project
  • 19
    A Full Featured E-Mail client with support for SMTP, POP3, Full IMAP, LDAP support for a global address book (anonymous and authenticated) unlimited private address books, todo lists, a personal calendar, spell checking support.
    Downloads: 3 This Week
    Last Update:
    See Project
  • 20
    win32 native port of the Mutt mail client
    Downloads: 3 This Week
    Last Update:
    See Project
  • 21
    plutoemail

    plutoemail

    Email reader for RISC OS operating system.

    Pluto is an email and newsgroup reader for the RISC OS operating system (see https://www.riscosopen.org/), developed by Jonathan Duddington from 1997 to 2004. It stores emails and news articles in Boxes, and they can be Listed, Viewed, Written, Spell checked, Replied to, Searched and even Spoken out loud! After Pluto was released under GPLv3 here on SourceForge in 2013, it has had many improvements. Pluto runs on any version of RISC OS later than v3.10, including RISC OS 5 computers such as the Raspberry Pi, BeagleBoard, IGEPv5, Iyonix, PandaBoard, Wandboard, PineA64 and Titanium as well as the older Risc PC and Archimedes series. From v3.16 onwards the RISC OS version of eSpeak is not included in the Pluto download, but separately in the Files espeak directory. The espeak project itself is on https://espeak.sourceforge.net/ but seems currently dormant. For full details of all updates since v3.06b, please see the Pluto Web Site on http://www.avisoft.f9.co.uk/pluto/
    Downloads: 3 This Week
    Last Update:
    See Project
  • 22
    CSCMail is an X/Gtk based MUA. It supports the POP3 protocal and can also read mailspool files/directories. It supports multiple accounts, filters, GPG, MIME, Spellchecking, HTML Mail (view only) and a host of other features.
    Downloads: 2 This Week
    Last Update:
    See Project
  • 23
    LaCabale
    Repository dedié au language
    Downloads: 2 This Week
    Last Update:
    See Project
  • 24
    Null Webmail is a simple yet powerful POP3/SMTP Webmail CGI written in C. It's small, fast, complete, and a breeze to install and use.
    Downloads: 2 This Week
    Last Update:
    See Project
  • 25
    Sylpheed and Sylpheed-claws as native Win32 applications. Build with MSVC 6.0 and Gtk+ libraries. Features: Use same local mailbox under Win and Linux (MH format), Multithreaded, internal HTML-parser, Filters, Colors, Newsreader, GPG, POP3, IMAP, SSL, .
    Downloads: 2 This Week
    Last Update:
    See Project
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