KMail is an email client included with the KDE desktop. It is the email component of Kontact, a integrated personal information manager.
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KMail is an email client included with the KDE desktop. It is the email component of Kontact, a integrated personal information manager.
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Mailspring is an open source, cross-platform email client that is a development of the now discontinued Nylas Mail.
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Balsa is an e-mail client for GNOME, highly configurable and incorporating all the features you would expect in a robust mail client.
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Trojitá is a Qt-based email client that aims to be fast in operation and function over slow or high-latency networks. It’s desktop agnostic.
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Astroid is a lightweight and fast graphical email client. Search, display and compose email, organized in thread and tags.
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Geary is an open source lightweight mail client for GNOME that is written in Vala. It offers a slim and economical user interface design.
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Claws Mail is a powerful and full-featured mail client formerly called Sylpheed-Claws. This is free and released under an open source license.
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SquirrelMail is a webmail package written in PHP. It has all the functionality you would want from an email client.
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RainLoop webmail was designed with efficient memory use in mind, so it can work fine even on low-end web servers.
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SnappyMail is a simple, modern, lightweight and fast web-based email client. It’s free and open source software written in PHP and JavaScript
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Mailpile is a fast email client with user-friendly encryption and privacy features.
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RoundCube Webmail is a browser-based multilingual IMAP client with an application-like user interface.
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Scrollout F1 is an easy to use, highly configurable email firewall (gateway) for multiple domains and servers.
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Pyzor is an implementation of a spam-blocking networked system that use spam signatures to identify them.
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Rspamd is an advanced spam filtering system that allows evaluation of messages by a number of rules.
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ASSP is a Perl based transparent SMTP proxy server. ASSP relays the SMTP dialog between an incoming client and your SMTP server.
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Bogofilter is a mail filter that classifies mail as spam or ham (non-spam) by a statistical analysis of the message’s header and content.
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MailScanner is a freely distributable E-Mail gateway virus scanner and spam detector. It uses sendmail or Exim as its basis.
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SpamAssassin is a mail filter using a variety of mechanisms including text analysis, Bayesian filtering, and DNS blocklists.
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eGroupWare is an enterprise ready web-based groupware suite. It is a flexible framework capable of hosting applications.
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