Delta Chat is a messaging app that works over e-mail
Delta Chat is a new chat app that sends messages via e-mails, encrypted if possible, with Autocrypt.
You do not have to sign up anywhere, just use your existing e-mail account with Delta Chat.
All your configs are located at ~/snap/deltachat-desktop/current/.config/DeltaChat
Snaps are applications packaged with all their dependencies to run on all popular Linux distributions from a single build. They update automatically and roll back gracefully.
Snaps are discoverable and installable from the Snap Store, an app store with an audience of millions.
Enable snapd
On Debian 9 (Stretch) and newer, snap can be installed directly from the command line: