Thanks for creating this useful extension. It allows me to auto-respond to certain types of emails. The native Auto-Reply does not work for me because I have to respond to another email-id quoting the original email.
Some Ideas for improvement:
After automatically resubmitting, say 10 emails, there are 10 little sending progress dialog boxes and I have to click on "Done" button on each of them to get rid of them. Each of them also takes up space on the taskbar and clutters it. Please make this sending progress dialog-box go away automatically and/or provide an option to not show this dialog at all. Until then, I plan to use AutoHotkey script with SetTimer to close these little dialog boxes.
In the Filter Actions dialog box, deselecting "Send Later (Template)" also deselects "Send Now (Template)". You can either select none of them or both of them - not just one of them.
Also, I set to DELETE the original email after "Resubmit - Send Now (Message + Template)" which moves it to the TRASH folder. It would be nice to be able to just expunge it, ie, delete the original email permanently bypassing the TRASH folder. It's risky but I know what I'm doing.
Another improvement idea would be to move the automatically "resubmitted" (message + template) to its own custom folder instead of the regular "Sent" folder thus automatically separating it from other regular emails.
This review is for a previous version of the add-on (0.2.2).