Rated 5 out of 5 stars

Από τον/την Randy στις Αύγ. 13, 2018 · μόνιμος σύνδεσμος

Still works on TB 52.9.1! Allows you to set delivery status notification to on, by default, and several other options. Exactly what I was looking for. Not sure why this option was removed from Thunderbird, but it should be included, so thanks to the developer of this.