Rated 5 out of 5 stars

This plugin has saved my bacon on numerous occasions: When I needed to send an email in the middle of the night so it would arrive at a certain time on another continent, or when I needed to be the first to respond after a certain time. If you are looking for an addon to send email at a later time, this does its job easily and well

This review is for a previous version of the add-on (6.4.0). 

Rated 5 out of 5 stars

I have been using Send Later for many years, across many computers, operating systems, and Thunderbird versions, and I am always happy with its reliability and level of features. The natural language processing always does a good job of doing what I want, and the mails always send (more-or-less) on time. Thank you!

This review is for a previous version of the add-on (6.3.3).