Fedora Magazine - https://fedoramagazine.org/4-addons-privacy-thunderbird/
Thunderbird is a popular free email client developed by Mozilla. Similar to Firefox, Thunderbird offers a large choice of add-ons for extra features and customization. This article focuses on four add-ons to improve your privacy.
Encrypting emails using GPG (GNU Privacy Guard) is the best way to keep their contents private. If you aren’t familiar with GPG, check out our primer right here on the Magazine.
Enigmail is the go-to add-on for using OpenPGP with Thunderbird. Indeed, Enigmail integrates well with Thunderbird, and lets you encrypt, decrypt, and digitally sign and verify emails.
Paranoia gives you access