KMail is a free and open source email client application for Linux. It is a kde project. It comes with spam detection, end-to-end encryption support, multiple sender identities, filtering, tagging, push email support, server-side filtering , inline OpenPGP, PGP/MIME and S/MIME. address auto-completion, offline support and many more.
How to Install KMail on Ubuntu Linux
To install KMail on your Ubuntu Linux system, run below command on your terminal command line application. It will install the latest version of KMail on your system.
sudo apt install kmail -y
After the installation you can run KMail using below command or via the Show Apps menu in Ubuntu dock.
You can also uninstall KMail using below command.
sudo apt-get -y autoremove --purge kmail