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.

  • Comet Backup - Fast, Secure Backup Software for MSPs Icon
    Comet Backup - Fast, Secure Backup Software for MSPs

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  • 1
    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.
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    Downloads: 10 This Week
    Last Update:
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  • 2
    Downloads: 5 This Week
    Last Update:
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  • 3
    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: 2 This Week
    Last Update:
    See Project
  • 4
    win32 native port of the Mutt mail client
    Downloads: 2 This Week
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  • Scalable Cloud APIs for Efficient PDF and eSign Workflows Icon
    Scalable Cloud APIs for Efficient PDF and eSign Workflows

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  • 5
    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: 1 This Week
    Last Update:
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  • 6
    Enhanced packages of Mozilla products for OS/2 and eComStation.
    Downloads: 1 This Week
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  • 7
    ** 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: 1 This Week
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  • 8
    LaCabale
    Repository dedié au language
    Downloads: 1 This Week
    Last Update:
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  • 9
    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: 1 This Week
    Last Update:
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  • 10
    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: 1 This Week
    Last Update:
    See Project
  • 11
    Privacy-oriented mailreader written in C using Gtk. It will support gpg/pgp, anonymous remailers, ssl, etc...
    Downloads: 1 This Week
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  • 12
    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: 1 This Week
    Last Update:
    See Project
  • 13
    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: 1 This Week
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  • 14
    Webmail client for call center agents. Designed to efficiently manage and report on a large number of emails to a small number of email addresses. Specifically designed with webforms in mind where one email address may receive over 1000 emails per day.
    Downloads: 0 This Week
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  • 15
    After one year without development of the XForms based Unix email client XFMail, the coding has started again. The GTK is supposed to be the toolkit of choice and so we will take XFMail's core, restructure it, and port it to the Gimp ToolKit.
    Downloads: 0 This Week
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  • 16
    AUC for Education is an GPLed intranet system designed for use in a K-12 setting that provides a web-based environment for students and teachers to interact via "Interactive Classrooms" and other innovative features.
    Downloads: 0 This Week
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  • 17
    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: 0 This Week
    Last Update:
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  • 18
    This program is a minimal SMTP client that takes an email message body and passes it on to a SMTP server (default is the MTA on the local host). Since it is completely self-supporting, it is especially suitable for use in restricted environments.
    Downloads: 0 This Week
    Last Update:
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  • 19
    Edbrowse is a comprehensive editor, browser, and email client that provides access to the net through a command line interface, appropriate for speech or braille. It also supports scripting, to interact with the net in the background, or in batch mode.
    Downloads: 0 This Week
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  • 20
    Downloads: 0 This Week
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  • 21
    A PHP Webmail, utilizing persistant IMAP connections and XHTML 1.1. Since the name is rather long, the preferred nickname is "d-mail".
    Downloads: 0 This Week
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  • 22
    Draconis is a suite with several Internet Programs for the ATARI platform. It contains clients and drivers for a sucessful internet access.
    Downloads: 0 This Week
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  • 23
    elmutt - mutt with elm features
    Downloads: 0 This Week
    Last Update:
    See Project
  • 24
    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: 0 This Week
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  • 25
    ExtmailHeaderFixer

    ExtmailHeaderFixer

    A Claws Mail plugin to fix the non-standard mails from Extmail.

    Moved to GitHub: https://github.com/sswv/extmailhf
    Downloads: 0 This Week
    Last Update:
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