Rated 5 out of 5 stars

Από τον/την JohannesK στις Δεκ. 6, 2015 · μόνιμος σύνδεσμος

The AddOn works like expected (with Thunderbird 38.4.0 at the moment). The feature request from David.P is implemented as an option - also per folder, which is just the right thing:
Ignore From account on Reply or Reply (let Thunderbird choose)