About this Add-on
It also includes:
— 4 spellchecker dictionaries (to choose from),
— a conjugation tool (which contains approximately 8000 verbs),
— a text formatter (to automatically correct most of typographical mistakes).
— a lexicon editor for your personal dictionary.
Grammalecte also exists for Firefox, LibreOffice and OpenOffice.
No support in the comments.
The version for Thunderbird 68 is available on Grammalecte website.
If you write answers before the quote, you must change the settings of each account in the panel [Composition and addressing] :
For [Composition], select [start my reply above the quote].
If you don’t change the option, the grammar checker won’t check the texte written before the quote.