Hello! Seriously considering Thunderbird after the recent refresh and am super delighted to see your collective contributions. A big thanks at the outset! I handle about 100 emails a day (both in and outbound) and have to keep going to the sent box towards the close of the day to delete all emails which i had to respond to but have no future use for. Could you introduce a feature in Thunderbird where the user is asked whether he/she wishes to save the email just after sending it? A "yes" retains the email in the sent box while a "no" does not. That way, i dont have to go to my sent box and go through numerous emails at the end of the day to keep my mailboxes clean. Secondly, could you introduce the ability to compose signatures within the application itself please? Just wanted to leave these two thoughts here. Wishing you the best for many more iterations of a truly wonderful outlook alternative!