Rated 5 out of 5 stars

Disappointed in the fact that with the new update of Thunderbird 'send-later' did not work. In a minute I realized how important this feature is. But, within 1 hour I got a response on my complain and a link to the beta version. Works like a charm. I will donate!! Great Service mr/ mrs 'Send-Later'

This review is for a previous version of the add-on (7.4.4). 

Rated 1 out of 5 stars

I was super happy with the 'send later' functionality. After I updated Thunderbird, it did not work anymore. Very disappointed that I was not warned about this before the update. I should have, sure thing, delayed the update. Now I lost a very important feature...

In general, let there no misunderstanding, I AM MORE THAN HAPPY WITH THUNDERBIRD IN GENERAL.

This review is for a previous version of the add-on (7.4.4). 

There is a beta version of Send Later for Thunderbird 78+, which will be released here within the week. In the mean time you can install it using the .xpi package from here: https://github.com/Extended-Thunder/send-later/releases

Also note, there is literally no way for Send Later to know that you are thinking about updating Thunderbird, so it can't warn you before you do that.