Sylpheed - lightweight and user-friendly email client

Sylpheed is a free and open source, multi-platform, simple and lightweight email client

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Sylpheed has a simple, fast and intuitive interface;
There is support for the main mail protocols: POP3, IMAP and SMTP, as well as NNTP (NetNews);
IPv6 support;
It is possible to sign and encrypt messages via GnuPG, as well as encrypted data transmission via POP3/IMAP4/NNTP via SSL/TLSv1;
It is possible to create folders for a more convenient organization of mail;
Export import of mail;
There is a search for various parameters;
You can customize the program view: show/remove blocks, customize the panel and columns. Window split: horizontal and vertical;
Sort emails by various parameters: size, date, recipient/sender, and others;
Support for different encodings;
There is an address book;
Spell check support;
Support for email templates, filters (filter spam mail), and actions;
It is possible to assign labels;
Spell check support;
Support for keyboard or mouse operation;
There is an offline mode;
Plugins support;
Support for keyboard shortcuts.

The software Sylpheed is available for installation on Linux, Windows and macOS\.

Installation method	OS
PPA	Ubuntu* 16.04/18.04/19.04/20.04, Linux Mint 18/19, Debian
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
EXE	Windows
DMG	macOS

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

Install Software via PPA repository

sudo add-apt-repository ppa:klaus-vormweg/sylpheed
sudo apt-get update
sudo apt-get install sylpheed

Install Software via Deb package

Install Software via RPM package

Install Software via EXE package on Windows

Install Software via DMG package for macOS

Language Interface:	English, Russian, Deutsch, Spanish, French and others
Description version:	3.7.0
Developer:	Hiroyuki Yamamoto
Programming language:	C, GTK+
License:	GPL v2
Software website:	sylpheed.sraoss.jp/en