This article covers how easy it is to install Geary on a Linux Mint 20 system. However, if you do not want to use this email client anymore, then you can remove it from your Linux system all the more conveniently.
Geary is a GTK-based mail app that lets you read, find and send email through a modern interface replete with GNOME Shell desktop integrations (notifications, GNOME Online Accounts, etc).
One major reason for using Geary over, say, Mozilla Thunderbird or Evolution is that it's built around “conversations” rather than individual mails.
To Install Geary on Ubuntu
Add the Geary Team PPA to your software sources:
$ sudo add-apt-repository ppa:geary-team/releases
$ sudo apt install geary