Hi! I use Thunderbird, but what I'm looking for doesn't necessarily have to be integrated into the Thunderbird program. Maybe I can't just attach or paste it...

I was wondering if there's such a script/feature/tool/widget (I'm not sure what you call it) wherein when I send an email, the recipient will have no choice but to confirm receipt to be able to read the message. He may actively click a button, or just by reading the message, the confirmation is auto-sent.

Currently, Thunderbird has a confirm receipt feature, wherein a small window pops up asking for you to confirm receipt or cancel notification. It actually bugs me when people don't confirm on important messages, leaving me to have to follow up on their receipt. It was there for a reason (grumble!).

Thanks!