KMail – email component of Kontact

KMail is an email client included with the KDE desktop. It is the email component of Kontact, a integrated personal information manager.

Kmail supports folders, filtering, viewing HTML mail, and international character sets. It can also handle IMAP, dIMAP, POP3, and local mailboxes for incoming mail. It can send mail via SMTP or sendmail.

Importantly, KMail supports the OpenPGP standard and can automatically encrypt, decrypt, sign, and verify signatures of email messages and its attachments via either the inline or OpenPGP/MIME method of signing/encryption.

Features include:

  • Maildir support.
  • Address book.
  • Expiry of old messages.
  • Automatic encryption using OpenPGP (PGP or GnuPG).
  • Supported protocols: POP3, IMAP (both also work with SSL and TLS).
  • SSL/TLS support for POP3.
  • Pipelining for POP3 and SMTP (faster mail download on slow responding networks).
  • On-demand downloading or deleting without downloading of big mails on a POP3 server.
  • SMTP authentication.
  • SMTP over SSL/TLS.
  • DIGEST-MD5 authentication.
  • Nested mail folders.
  • Powerful mail filters.
  • Mailing list aware folders.
  • Drafts folders.
  • Full support for mails in all languages and charsets supported by Qt.
  • Import of other mail clients’ folders.
  • Search dialog.
  • Support for reading HTML mails.
  • Editor supports spell checking, undo/redo.
  • Threaded messages view.
  • Multiple identities.
  • Colorfied indenting (i.e. text that’s quoted has a different color).
  • Background sending and downloading of mail.
  • KDE integration such as drag and drop.
  • Automatic popup address completion (similar to Konqueror).
  • Support for custom colors and fonts.
  • Mail bouncing capability (anti-spam).
  • UTF-7 support.
  • PGP/MIME (RFC 3156) support for GnuPG users.
  • S/MIME support.
  • Optional compression of attachments.
  • Import mail from Evolution 2.x, Opera and Thunderbird.

Website: userbase.kde.org/KMail
Support: FAQ, GitHub Code Repository
Developer: KDE
License: GNU GPL

KMail is written in C++. Learn C++ with our recommended free books and free tutorials.

Return to Graphical Email Clients Home Page


Popular series
Guide to LinuxNew to Linux? Read our Linux for Starters series. We start right at the basics and teach you everything you need to know to get started with Linux.
Free and Open Source SoftwareThe largest compilation of the best free and open source software in the universe. Each article is supplied with a legendary ratings chart helping you to make informed decisions.
ReviewsHundreds of in-depth reviews offering our unbiased and expert opinion on software. We offer helpful and impartial information.
Alternatives to Proprietary SoftwareReplace proprietary software with open source alternatives: Google, Microsoft, Apple, Adobe, IBM, Autodesk, Oracle, Atlassian, Corel, Cisco, Intuit, and SAS.
DockerGetting Started with Docker helps you master Docker, a set of platform as a service products that delivers software in packages called containers.
System ToolsEssential Linux system tools focuses on small, indispensable utilities, useful for system administrators as well as regular users.
ProductivityLinux utilities to maximise your productivity. Small, indispensable tools, useful for anyone running a Linux machine.
Home ComputersHome computers became commonplace in the 1980s. Emulate home computers including the Commodore 64, Amiga, Atari ST, ZX81, Amstrad CPC, and ZX Spectrum.
Now and ThenNow and Then examines how promising open source software fared over the years. It can be a bumpy ride.
Linux at HomeLinux at Home looks at a range of home activities where Linux can play its part, making the most of our time at home, keeping active and engaged.
Linux CandyLinux Candy reveals the lighter side of Linux. Have some fun and escape from the daily drudgery.
Android AppsBest Free Android Apps. We showcase free Android apps that are definitely worth downloading. There's a strict eligibility criteria for inclusion in this series.
Programming BooksThese best free books accelerate your learning of every programming language. Learn a new language today!
Programming TutorialsThese free tutorials offer the perfect tonic to our free programming books series.
Stars and StripesStars and Stripes is an occasional series looking at the impact of Linux in the USA.
Share this article

Share your Thoughts

This site uses Akismet to reduce spam. Learn how your comment data is processed.