Claws Mail - email client and news reader

Claws Mail is a free and open source, lightweight and easily customizable email client and news reader based on GTK+

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Support for multiple accounts;
It is possible to customize the program interface, as well as change the view/location;
There is a sorting of messages;
There is a search;
Spam filtering support;
Support for reading and publishing Usenet news;
MIME attachments;
SSL support on POP3, SMTP, IMAP4rev1, and NNTP protocols;
There is an address book (import from LDIF, Mutt or Pine, import from other mail programs using scripts). Collecting addresses for the address book. Export your address book to various formats;
It is possible to mark the message, as well as highlight it with color and assign a tag;
Support for email templates;
Support for actions;
Attachment support;
Import/Export Mbox;
Full support for GnuPG encryption (GPGME);
There is a built-in image viewer;
Spell check (using enchant);
Drag’n’drop support;
Automatic message saving when created;
Anti-phishing URL verification;
Signature support;
Setting the message priority;
Command-line management;
Plugin support;
Support for design themes;
Full-screen mode support;
Proxy support;
Support for keyboard shortcuts.

The software Claws Mail is available for installation on Linux and Windows.

Installation method	OS
Deb	Ubuntu* 16.04/18.04/19.04/20.04, Linux Mint 18/19, Debian
RPM	openSUSE, Rosa Linux, Mageia, ALT Linux, Fedora, CentOS, Red Hat Enterprise Linux and others
Snap	Ubuntu, Linux Mint, Debian, Arch Linux, Fedora, CentOS, KDE Neon, openSUSE, elementary OS, Manjaro, Red Hat Enterprise Linux
Flatpak	Ubuntu, Linux Mint, Debian, Arch Linux, Fedora, CentOS, KDE Neon, openSUSE, elementary OS, Manjaro, Red Hat Enterprise Linux
EXE	Windows

*Ubuntu (GNOME), Kubuntu (KDE), Xubuntu (XFCE), Lubuntu (LXDE)

Install Software via Deb package

Install Software via RPM package

Install Software via Snap package

sudo snap install claws-mail-moon127

Install Software via Flatpak package

flatpak install flathub org.claws_mail.Claws-Mail

Install Software via EXE package on Windows

Language Interface:	English, Russian, Deutsch, Spanish, French and others
Description version:	3.17.8
Developer:	The Claws Mail Team
Programming language:	C, GTK+
License:	GPL v3
Software website:	claws-mail.org