Email Clients for Desktop Operating Systems

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

  • Rezku Point of Sale Icon
    Rezku Point of Sale

    Designed for Real-World Restaurant Operations

    Rezku is an all-inclusive ordering platform and management solution for all types of restaurant and bar concepts. You can now get a fully custom branded downloadable smartphone ordering app for your restaurant exclusively from Rezku.
    Learn More
  • Field Sales+ for MS Dynamics 365 and Salesforce Icon
    Field Sales+ for MS Dynamics 365 and Salesforce

    Maximize your sales performance on the go.

    Bring Dynamics 365 and Salesforce wherever you go with Resco’s solution. With powerful offline features and reliable data syncing, your team can access CRM data on mobile devices anytime, anywhere. This saves time, cuts errors, and speeds up customer visits.
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  • 1
    MultiMail Offline Reader
    MultiMail is an offline mail packet reader for Unix and other systems. It currently supports the Blue Wave, QWK, OMEN, OPX and SOUP formats. It has a full screen, color user interface, built with the curses library.
    Downloads: 4 This Week
    Last Update:
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  • 2
    Aegis Implicit Mail (AIM)

    Aegis Implicit Mail (AIM)

    Send Mime and Smime Emails to Any Type of Mail Server

    Aegis Implicit Mail is a free and open source library which is designed to provide fast and developer friendly API to send emails using SMTP ports. Binaries are available in the form of NuGet package: https://www.nuget.org/packages/AIM Please check http://pki.tools/aim.html as well AIM Supports : * None Ssl Mails * Implicit Ssl Mails * Explicit Ssl Mails * Smtp Connection test * Detect Ssl type of mail server * Attachments for MIME and S/MIME message. * In-line attachment and separate file attachment * All content types and mimes * SMIME , Signed and Encrypted mails In an integrated way Sadly, Microsoft.Net.Mail Ssl Mails does not support Implicit Ssl Mail and it is still used by many servers, including port 465 of Gmail here AIM comes to make a readable and fast alternative to send your smtp mails. For unicode issues please refer to https://sourceforge.net/p/netimplicitssl/tickets/4/ . We really appriciate any help in testing of different encodings
    Downloads: 1 This Week
    Last Update:
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  • 3
    Mammail 1.0

    Mammail 1.0

    Email client written in C# .NET; fast and smart, 1 button push mailing

    Every now and then we need to e-mail our friends, family and more. But the available suites are not only complicated but also time consuming. They are mainly targeted for business purposes like Microsoft Office Outlook, or Windows Live Mail. Those of you who use such mail clients definitely know that these programs have got a jerky performance as well as keeps you waiting for a minute or so just to synchronize(send/receive) mails from your mail accounts. What if I just need to send a mail in a couple of seconds to my friend or to a mailbox for a subscription closing in a minute. Well, here comes the time complexity. We need faster client-side apps for mailing. I have understood the need of such a software and I’m glad to present it before you.
    Downloads: 2 This Week
    Last Update:
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  • 4
    AlphaMail is an accelerated web mail interface with a C++ middleware layer that is more effective than an IMAP proxy which is a highly scalable (10k+ users). The interface includes modern features, Section 508 compliance, and universal browser support.
    Downloads: 2 This Week
    Last Update:
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  • Skillfully - The future of skills based hiring Icon
    Skillfully - The future of skills based hiring

    Realistic Workplace Simulations that Show Applicant Skills in Action

    Skillfully transforms hiring through AI-powered skill simulations that show you how candidates actually perform before you hire them. Our platform helps companies cut through AI-generated resumes and rehearsed interviews by validating real capabilities in action. Through dynamic job specific simulations and skill-based assessments, companies like Bloomberg and McKinsey have cut screening time by 50% while dramatically improving hire quality.
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  • 5
    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:
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  • 6

    Platinum Email Sender

    Simple Email sender application in the smartest way .

    Platinum Email Sender is a WINDOWS platform dependent email sender based on .net. It can allow you to send the email in the fastest way . SMTP server name & Email will automatically get from the "From" field . If you check the "Remember Your Login" , it will save your login information . Version: 2.1.0 (Released at 31-Mar-2014) Recommendations: ♦ You must have the Microsoft dotnetframework 3.5 installed in your system. . License: Freeware. You can use and redistribute this software for free without any modification of the files provided with the software. Developer: Md. Shihabur Rahman. Desktop , Android & Web Application Developer Email: shihab.mbstu@gmail.com Follow me on Facebook: www.facebook.com/shihab990 SourceForge.net Profile: http://shihab990.users.sourceforge.net/ Copyright © 2014, Md. Shihabur Rahman. All Rights Reserve
    Downloads: 1 This Week
    Last Update:
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  • 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: 1 This Week
    Last Update:
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  • 8
    This is a Java Email client for academic purpose. It will include the general email client features and other experimental techniques such as uncertain reasoning, HCI principles. This project is not supported now.
    Downloads: 0 This Week
    Last Update:
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  • 9
    ASAP Email Sender

    ASAP Email Sender

    Send Emails ASAP

    This is a Small and Handy yet powerful Email Sender application which allows you to send Emails ASAP. It also has an Awesome Screen Capture utility as well as Customization options. It's an Easy-to-Use app. It comes pre-loaded with some popular Email Service Provider's settings. You can also send bulk emails by separating each email with a comma(,). This app includes Cc, Bcc and as well as file attachment options. It focuses on speed and simplicity. Simplicity is the main keyword that you could assign to this application. Using it doesn't pose any problems to any user, regardless of their experience level.
    Downloads: 0 This Week
    Last Update:
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  • Collect! is a highly configurable debt collection software Icon
    Collect! is a highly configurable debt collection software

    Everything that matters to debt collection, all in one solution.

    The flexible & scalable debt collection software built to automate your workflow. From startup to enterprise, we have the solution for you.
    Learn More
  • 10
    Email2Fax and Fax2Email gateway for Asterisk, that could be integrated to your own existing Asterisk.
    Downloads: 0 This Week
    Last Update:
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  • 11
    Beam has moved to github: http://github.com/olta/beam
    Downloads: 0 This Week
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  • 12
    IMAP protocol implementation in C++
    Downloads: 0 This Week
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  • 13
    Diom Webmail is a webmail client written in PHP to interact with an IMAP server. Diom Webmail is easily configurable, with common features like sending and recieving messages and attachements, as well as an address book, and spell check.
    Downloads: 0 This Week
    Last Update:
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  • 14
    Ec supports reading, composing, and sorting messages in user defined folders. It can send and receive mail to and from remote POP3 and SMTP servers, and route mail using sendmail, exim, and qmail. Ec also supports MIME attachments and multiple accounts
    Downloads: 0 This Week
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  • 15
    elmutt - mutt with elm features
    Downloads: 0 This Week
    Last Update:
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  • 16

    FalconMailer

    Send emails quickly and efficiently.

    FalconMailer is a Java-based Mail API that can send emails quickly and efficiently. The API is easy to use and is much faster than the JavaMail. FalconMailer uses SSL.
    Downloads: 0 This Week
    Last Update:
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  • 17
    Farsi Translation of Mozilla-based Browsers. FarsiMoz is initiated with the hope of making Mozilla-based internet clients more accesseblie to Iranians every where. We started translation from Mozilla 1.2 and will translate other versions in the near
    Downloads: 0 This Week
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  • 18

    Go Gmailer

    Go Gmailer is a java based desktop app to send emails.

    Go Gmailer is a java based desktop app to send emails.It is developed for people having slow internet connection.It is real simple and quick to send emails from this app. N.B.: It is recommended to create an app password for this app and choose remember me option to login after entering the app password so that you don't have to remember the app password for your G-mail account separately.This is JAVA based app so no doubt of security! If you have any issues with app then feel free to email us at- help.gomailer@gmail.com Like us at Facebook - www.facebook.com/gmailers
    Downloads: 0 This Week
    Last Update:
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  • 19
    Your own mailing system (most easiest to use with zero configuration) for the entire world (available in almost all the languages of the world) which will include Mail User Agent and Mail Transfer Agent thus trying to give maximum speed while transferrin
    Downloads: 0 This Week
    Last Update:
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  • 20
    KvMail will be a complete e-mail suite, including access to POP, HTTP, and IMAP servers, written in Ruby with a Tk interface.
    Downloads: 0 This Week
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  • 21
    LED Lens Information Network
    Downloads: 0 This Week
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  • 22
    LaCabale
    Repository dedié au language
    Downloads: 0 This Week
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  • 23
    MassDelivery
    Программа для рассылки почтовых сообщений через smtp. /Program for mass delivery of email through smtp. Can transfer a plain text to many e-mails with templates. Now https://github.com/zlv/SpamTeacher
    Downloads: 0 This Week
    Last Update:
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  • 24
    Hey Everyone! Nirvana has moved to http://sourceforge.net/projects/nirvana It isn't here anymore.
    Downloads: 0 This Week
    Last Update:
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  • 25
    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: 0 This Week
    Last Update:
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