Email Software for Windows

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

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  • 1
    SquirrelMail
    SquirrelMail is a PHP-based Web email client. It includes built-in pure PHP support for IMAP and SMTP, and renders all pages in pure HTML 4.0 for maximum compatibility across browsers. It has strong MIME support and a flexible plugin system.
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    Downloads: 365 This Week
    Last Update:
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  • 2
    threadkey

    threadkey

    Add keyboard shortcuts to switch between different thread views

    Strike the 'T' key to sort messages by thread, strike the 'U' key to sort unthreaded again, just like the 'G' key switches to Grouped By Sort view.
    Downloads: 123 This Week
    Last Update:
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  • 3
    hMailServer is a SMTP/POP3/IMAP server for Windows. Data is stored in MySQL/MSSQL database and is easily accessed using the COM library. Project info, trackers and downloads has moved to www.hmailserver.com.
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    Downloads: 31 This Week
    Last Update:
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  • 4
    NOCC
    NOCC is a simple and fast Webmail client which can handle POP3 and IMAP mailboxes and sends email via SMTP. It is written with PHP, has low requirements (no database, frames). Features multi-language support, MIME attachments, displays HTML messages. The installation guide comes with the source code: https://sourceforge.net/p/nocc/code/HEAD/tree/trunk/webmail/docs/INSTALL If you encounter problems or bugs you can always try the current HEAD version: https://sourceforge.net/p/nocc/code/HEAD/tarball?path= Questions, bug reports or support requests are very welcome: https://sourceforge.net/p/nocc/_list/tickets Alternative source code repository: https://github.com/oheil/NOCC
    Downloads: 10 This Week
    Last Update:
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  • 5
    Mail Notifier

    Mail Notifier

    Mail Notifer for Windows

    Mail Notifier is free, modern email notifier with the latest user interface trends for Windows 10/11. It supports multiple accounts and IMAP/POP3 protocols. Enjoy customizable notifications, message previews, and more, all in 34 languages! For more details, please refer to the readme.txt file (Files tab, description below). Note: Gmail support is currently unavailable due to verification requirements by Google. Note: Outlook.com support is currently unavailable due to moving to OAuth2 authentication from login/password at Outlook servers.
    Downloads: 20 This Week
    Last Update:
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  • 6

    PHP Address Book

    Simple, web-based address & phone book

    Simple, web-based address & phone book, contact manager, organizer. Groups, addresses, e-Mails, phone numbers & birthdays. vCards, LDIF, Excel, iPhone, Gmail & Google-Maps supported. PHP / MySQL based.
    Downloads: 3 This Week
    Last Update:
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  • 7
    Thunderbird-Tray is a system tray launcher tool for Mozilla Thunderbird, the popular e-mail client. You can use TB-Tray to hide Thunderbird to the tray while you don't need it. When you click the tray icon, TB-Tray will restore Thunderbird.
    Downloads: 4 This Week
    Last Update:
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  • 8
    AfterLogic WebMail Lite 7
    AfterLogic WebMail Lite PHP is a free AJAX webmail application. Users can receive, view, manage, compose, and send email through web interface (IMAP and SMTP supported). Source code included.
    Downloads: 3 This Week
    Last Update:
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  • 9
    FUDforum
    FUDforum is a super fast and scalable discussion forum. It is highly customizable and supports unlimited members, forums, posts, topics, polls & attachments. It can import XML Feeds and sync with USENET groups and Mailing Lists (bi-directional).
    Downloads: 2 This Week
    Last Update:
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  • 10
    Columba
    Columba is an email client written in Java, featuring a user-friendly graphical interface with wizards and internalionalization support. Its a powerful mail management tool with features to enhance your productivity and communication.
    Downloads: 2 This Week
    Last Update:
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  • 11
    AfterLogic WebMail Lite .NET
    Free and easy-to-use webmail script with AJAX interface. Supports POP3/IMAP accounts, SMTP, SSL. Users can check and send mail, use address book. Skins, non-English languages, UTF-8. MS SQL/MySQL/MS Access backends supported.
    Downloads: 2 This Week
    Last Update:
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  • 12
    RainLoop Webmail (PHP)

    RainLoop Webmail (PHP)

    Simple, modern & fast web-based email client

    Modest system requirements, decent performance, simple installation and upgrade, no database required - all these make RainLoop Webmail a perfect choice for your email solution.
    Downloads: 2 This Week
    Last Update:
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  • 13
    mailredirect

    mailredirect

    Allow to redirect (a.k.a. "remail") mail messages to other recipients

    The Mailredirect extension for Mozilla Thunderbird and Mozilla SeaMonkey adds the ability to redirect one or more email messages to one or more recipients. The feature of email redirecting is also known as remailing or resending. The extension is an answer for https://bugzil.la/12916
    Downloads: 1 This Week
    Last Update:
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  • 14
    Archive This for Thunderbird
    "Archive This" is an add-on for the Thunderbird email client that provides shortcuts for filing messages into folders rapidly and efficiently.
    Downloads: 0 This Week
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  • 15
    Auto Encryption is an extension to thunderbird to search your certificate database and find the emails you enter. If they are found and your able to encrypt the mail it enables encryption, otherwise it disables it.
    Downloads: 0 This Week
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  • 16
    Web based IMAP mail channel for uPortal, using JavaMail API.
    Downloads: 0 This Week
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  • 17
    EGroupware Enterprise Collaboration
    EGroupware has moved to Github, please find all our downloads there: https://github.com/EGroupware/egroupware/releases EGroupware is a multi-user, web-based groupware suite. Currently available modules include: email, addressbook, calendar, infolog (notes, to-do's, phone calls), content management, wiki, project management, tracker, timesheet, knowledge base, CalDAV/CardDAV
    Downloads: 0 This Week
    Last Update:
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  • 18
    An OpenSource Software Release Code based on Web using PHP, JS, AJAX and others....
    Downloads: 0 This Week
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  • 19
    NokSync is a Thunderbird extension, which synchronizes contacts between Mozilla Thunderbird and most NOKIA phones. NokSync will compare Thunderbird address books with contacts in a NOKIA phone, and synchronize them under user control.
    Downloads: 0 This Week
    Last Update:
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  • 20
    Roundcube Webmail

    Roundcube Webmail

    Free and open source webmail software

    Roundcube Webmail is a browser-based, multilingual IMAP client with an application-like user interface. Roundcube provides the full functionality you'd expect from an email client, including MIME support, address book, folder manipulation, message searching, and spell check. Roundcube is written in PHP and JavaScript.
    Downloads: 0 This Week
    Last Update:
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  • 21
    The Address Book is a free, open source address management system, utilizing the combined power of PHP scripting and MySQL databases to provide a flexible, robust system allowing users to add a virtually unlimited number of addresses and other info.
    Downloads: 0 This Week
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  • 22
    A Covide-based Groupware and CRM-solution adapted for efficient resource-management. Resources being both people and objects.
    Downloads: 0 This Week
    Last Update:
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  • 23
    jmailto is a tiny Java Applet which can be used to replace HTML's native "mailto:" tag. It aims to prevent Spam bots and harvesters from automatically collect (your) E-Mail addresses by searching the HTML source code of your page.
    Downloads: 0 This Week
    Last Update:
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  • 24
    This is a module PostNuke for those who like to give emailforwarding to their users. It simply allows users to make/edit a .qmail-{pn_uid} file in a directory (configured by the siteadmin).
    Downloads: 0 This Week
    Last Update:
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  • 25
    A webmail-client (POP3, IMAP, SMTP) written in Java as a webapp. Very easy to install - just throw the WAR-file into the deployment-directory of your Servlet-container (tomcat, jetty, weblogic, ..) and you're ready! Test ride on the yawebmail-Homepage!
    Downloads: 0 This Week
    Last Update:
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