Rated 2 out of 5 stars

The functionality provided here is essential (and so should be built into Thunderbird).

There is a bug whereby the confirmation window disappears if one moves away from it - and then the compose window loses functionality.

I have reported this bug and even - in one of several follow ups - offered to pay for it being fixed. I first reported the bug a month or two ago, I think. Response? None.

This review is for a previous version of the add-on (2.0.18).