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
    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: 19 This Week
    Last Update:
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  • 2

    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.
    5.0 out of 5 stars 8 Reviews
    Downloads: 3 This Week
    Last Update:
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  • 3
    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.
    3.7 out of 5 stars 16 Reviews
    Downloads: 4 This Week
    Last Update:
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  • 4
    Is an ASP.NET webmail application written in C#. It uses a POP3 or IMAP servers as the mailstore and sends mail through a SMTP server. You can compose HTML messages, search your inbox, read complex mime messages and much more. .NET and Mono compatible.
    5.0 out of 5 stars 1 Review
    Downloads: 3 This Week
    Last Update:
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  • 5
    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
    4.4 out of 5 stars 5 Reviews
    Downloads: 1 This Week
    Last Update:
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  • 6
    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...
    5.0 out of 5 stars 1 Review
    Downloads: 1 This Week
    Last Update:
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  • 7
    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: 1 This Week
    Last Update:
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  • 8
    OutlookMeetingEnhancer

    OutlookMeetingEnhancer

    Enhances the outlook meeting experience by few added features

    Writing minutes of a meeting are often time consuming and are often incomplete. There are also associated tasks with writing MOM, e.g - marking attendees, scheduling the next meeting, distribution of tasks after a meeting etc. There are many licensed tools for doing these tasks. This software tries to address this need through a simple single page user interface where user can do all the above tasks and send out minutes of meeting without much effort. The installation is single click and the software is compatible with Outlook 2010 and above. I have used some open source components like YARTE texteditor, RicherTextBox texteditor etc for this project. You can contact me here or through my website - http://www.scotchandnuggets.com/
    Downloads: 1 This Week
    Last Update:
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  • 9

    Simple WPF Emailing

    Newsletters / emailing Tool

    simple Emailing is a newsLetter / Mass Mailing Tool. It's writen in C# / .Net 4 / WPF and deals with SQL Server Compact. It contains browser, email extractor from web page and ASCII file.. Fr : simple Emailing WPF est un outil de newsLetter / gestion de Mass Mailing. Aprés la configuration de votre compte mail ( SMTP ) , vous pourrez publiposter à une liste de prospect / contact, gérée avec les champs : organisation/société, nom, prenom du contact... il contient également un navigateur web et un extracteur d'adresse mail ( fichier texte et page web ). Il est ditribué gratuitement et a été écrit en .Net 4, avec WPF. Son code source est disponible sur demande
    Downloads: 1 This Week
    Last Update:
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  • 10
    The Sleuth(Spam-mail Elimination Using Tried Heuristics), part of the Anti Spam Initiative, developed in Microsoft .NET(VB.NET) acts a powerful engine to identify potential spam. Light weight and extensible thanks to the XML filter file it employs.
    Downloads: 1 This Week
    Last Update:
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  • 11
    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
    Last Update:
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  • 12
    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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  • 13
    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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  • 14
    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: 0 This Week
    Last Update:
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  • 15

    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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  • 16
    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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  • 17

    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
    Last Update:
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  • 18
    An .NET webmail project ...
    Downloads: 0 This Week
    Last Update:
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  • 19
    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: 0 This Week
    Last Update:
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  • 20
    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
    Last Update:
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  • 21
    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
    Last Update:
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  • 22
    Koolwired.Imap is a fully managed .NET IMAP client library written in C#.
    5.0 out of 5 stars 3 Reviews
    Downloads: 0 This Week
    Last Update:
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  • 23
    The MeSHSimPack is a library package used for measuring similarity between concepts in the MESH ontology.
    Downloads: 0 This Week
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  • 24
    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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  • 25
    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
    Last Update:
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