Rated 5 out of 5 stars

Από τον/την Demetrios Panayotakopoulos στις Απρίλ. 22, 2016 · μόνιμος σύνδεσμος

One of the BEST addons.
However, after upgrading to Thundrbird 45 it does not read/load the existing templates any more, neither creates/saves new ones.

Many, many, many thanks to gregor111 for his fix on April 22, 2016.
https://addons.mozilla.org/en-GB/thunderbird/user/gregor111/