Rated 5 out of 5 stars

A very useful add-on, indeed. It should be embedded into Thunderbird. One drawback: when I use the option "Insert automatically default subject" with default subject in Cyrillic, the result is unexpected. Encoding should be corrected.

This review is for a previous version of the add-on (0.2.1). 

Thanks for review and bug report: i haven't checked this last time... sorry. I'm currently fixing it. New version will come very soon. Regards,
EDIT: this bug has been fixed in v0.2.2.