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.

  • Top-Rated Free CRM Software Icon
    Top-Rated Free CRM Software

    216,000+ customers in over 135 countries grow their businesses with HubSpot

    HubSpot is an AI-powered customer platform with all the software, integrations, and resources you need to connect your marketing, sales, and customer service. HubSpot's connected platform enables you to grow your business faster by focusing on what matters most: your customers.
  • Free and Open Source HR Software Icon
    Free and Open Source HR Software

    OrangeHRM provides a world-class HRIS experience and offers everything you and your team need to be that HR hero you know that you are.

    Give your HR team the tools they need to streamline administrative tasks, support employees, and make informed decisions with the OrangeHRM free and open source HR software.
  • 1
    It is an email sender. This software can send your mass marketing bulk email to unlimited mailing list. The program can send via SMTP server, MAPI, or delivers e-mail directly without ISP's mail system. Also includes flexible address filters and rules.
    Downloads: 9 This Week
    Last Update:
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  • 2
    This project provide features to manage your tasks and control your activities. Get rpts as Pending Items, Latest and Solved Items. Send these to someone by e-mail and Schedule your tasks to receive alerts.
    Downloads: 23 This Week
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  • 3

    MorphyMail Free Email Marketer

    Create, send and track Unlimited bulk emails for Free

    Desktop software for windows to create, send and track unlimited bulk emails for lifetime for free. Includes 500 email templates , automated bounce and subscription processing, spam checker, WYSIWYG HTML editor, google analytics and social media integration, automated delivery tracking to track opens , clicks and geolocation of recipients, multithreaded engine for fast delivery of emails, website forms integration, scheduled mailing and much more features. It is a 100% free software to send unlimited bulk emails for lifetime.
    Downloads: 4 This Week
    Last Update:
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  • 4
    FreeMiCal allows the bulk export of MS Outlook appointment items to RFC 2445 conformant iCal format. .NET 2.0 or greater and Outlook 2003 or 2007 Interop Services required.
    Downloads: 7 This Week
    Last Update:
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  • Automated quote and proposal software for IT solution providers. | ConnectWise CPQ Icon
    Automated quote and proposal software for IT solution providers. | ConnectWise CPQ

    Create IT quote templates, automate workflows, add integrations & price catalogs to save time & reduce errors on manual data entry & updates.

    ConnectWise CPQ, formerly ConnectWise Sell, is a professional quote and proposal automation software for IT solution providers. ConnectWise CPQ offers a wide range of tools that enables IT solution providers to save time, quote more, and win big. Top features include professional quote or proposal templates, product catalog and sourcing, workflow automation, sales reporting, and integrations with best-in-breed solutions like Cisco, Dell, HP, and Salesforce.
  • 5
    We provide a Hebrew version of Mozilla Firefox, Mozilla Thunderbird, SeaMonkey and Mozilla Application Suite. SeaMonkey/Mozilla Suite are also available for download from here, while the latest Firefox & Thunderbird are available only from mozilla.com.
    Downloads: 1 This Week
    Last Update:
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  • 6
    The project is an open source Windows-based Email client written in C# using Visual Studio 2008, .NET 3.5 with SQL Server 2005 as the backend database. The project uses LINQ for data access.
    Downloads: 0 This Week
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  • 7
    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: 0 This Week
    Last Update:
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  • 8
    Backup2Mailbox

    Backup2Mailbox

    A winform application in C# sends files to mailbox for backup use.

    This application sends local files as email attachments to large mailbox for backup use, it supports any kind of files, specially for photos, EXif info's can be extracted and shown in email content.
    Downloads: 0 This Week
    Last Update:
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  • 9
    Carassius is an Email client unlike any other. In addition to a new intuitive approach to the regular email protocols (POP3, IMAP, SMTP), Carassius also handles the major Webmail services including Gmail, Yahoo! Mail & Hotmail.
    Downloads: 0 This Week
    Last Update:
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  • High-performance Open Source API Gateway Icon
    High-performance Open Source API Gateway

    KrakenD is a stateless, distributed, high-performance API Gateway that helps you effortlessly adopt microservices

    KrakenD is a high-performance API Gateway optimized for resource efficiency, capable of managing 70,000 requests per second on a single instance. The stateless architecture allows for straightforward, linear scalability, eliminating the need for complex coordination or database maintenance.
  • 10

    Email Processing in ASP.NET

    Aspose.Email allows you to work with IMAP, POP and Exchange emails

    Email Processing in ASP.NET is a web application that demonstrates some of the great features of Aspose.Email for .NET. This application will practically show you the power and ease of use for working with emails from within your .NET applications.
    Downloads: 0 This Week
    Last Update:
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  • 11
    Helps passing of relevant arguments to Mozilla (Gecko) based applications from a simple, descriptive GUI. Can save these 'Launchlets' to system tray, Start Menu, or Desktop. Simplifies managing multiple profiles, testing extensions, and troubleshooting
    Downloads: 0 This Week
    Last Update:
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  • 12

    GMail Email Sender

    Sending mail with your Gmail Account with out any Web browser support

    This project is written in C# and Windows Presentation Foundation with Visual Studio 2010. I like to develop this project as Open Source Project. and Improve by All of Developers. Also this is small Project Compare with other.
    Downloads: 0 This Week
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  • 13
    An .NET webmail project ...
    Downloads: 0 This Week
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  • 14
    IMAP-Agent is an automated IMAP mail folder management system implementing site wide and individual user specific rules for filtering mail between folders. Also, quotas can be maintained by age or max count of messages for any folder.
    Downloads: 0 This Week
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  • 15
    InboxVault is a service built on top of Documentum 6, using DFS, and hMailServer, an open-source .NET-based email server. The idea of InboxVault is to create a service that makes getting to your content as easy as sending an e-mail.
    Downloads: 0 This Week
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  • 16
    Koolwired.Imap is a fully managed .NET IMAP client library written in C#.
    Downloads: 0 This Week
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  • 17
    The MeSHSimPack is a library package used for measuring similarity between concepts in the MESH ontology.
    Downloads: 0 This Week
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  • 18
    Mail2Voice

    Mail2Voice

    E-Mail software for people with cognitive impairment and illiteracy.

    /!\ Please see our website for downloads /!\ E-Mail client software dedicated to people with cognitive impairment and illiteracy. Very simplified graphical interface, voice recording outgoing messages (attached MP3), speech reading incoming messages. The code moved to Git : https://git.framasoft.org/groups/Mail2Voice /!\ Please see our website for downloads /!\
    Downloads: 0 This Week
    Last Update:
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  • 19
    An IMAP4 Mail Client based on LumiSoft Mail Server API. The client support online, offline and disconnected mode. The client make it possible to manage rules for filtering mail. Mail are moved in new folders based on the rules.
    Downloads: 0 This Week
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  • 20
    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 Iā€™m glad to present it before you.
    Downloads: 0 This Week
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  • 21
    Memba Velodoc Outlook Add-in lets users send large files from within Microsoft Outlook 2003 or above using various server platforms including Velodoc XP Edition, Velodoc Enterprise Edition, BITS servers, FTP servers, UNC file shares and Amazon S3.
    Downloads: 0 This Week
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  • 22
    A mail/calendar/RSS client for Windows using the .NET 2.0 framework. Support POP, SMTP, GMail, GCalendar, iCal and local calendars. MyOE include and advanced spam filter, message sorting, live query, indexed search, and many more...
    Downloads: 0 This Week
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  • 23
    NMail is the C# written library, which provide message handling and receiving functionality.
    Downloads: 0 This Week
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  • 24
    Nikita is a peer-to-peer PIM. It will offer all the same benefits of the standard PIMS (such as Outlook or Chandler) but will not require a central server. Items can be marked as Calendar, Task, Email, etc... or any combination of those. Silos be gone!
    Downloads: 0 This Week
    Last Update:
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  • 25
    OpenMC : The Open Source Multimedia Center for your Television An HTPC / VCR / PVR / TV / Jukenbox Plug In driven Application for your PC Mixing Multimedia and Web technologies for the best ergonomy !
    Downloads: 0 This Week
    Last Update:
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