I need a plugin for Thunderbird vers. 68.x upwards.
The plugin should make a button into thunderbird. After I selectedt an email and click the button, a little poup-window should be opened where I can enter some notes. Theese notes should be stored within my mysql-database on webserver.
When I select an email in Thunderbird, the plugin should check if there exists notes to that email within my database. If yes, they should be displayed.