Rated 5 out of 5 stars

I love this add-on! I just switched to Thunderbird from Outlook and was looking for something that can replace unchecking Send immediately option to avoid a blunder. Here I am. I found even a better option where I can prevent a message being sent out without attachments when it is supposed to. I can confirm all the recipients' addresses by enabling Popup all recipients. This is absolutely great!!!

This review is for a previous version of the add-on (0.8.10).