I have been wanting this functionality for my mailbox since quite sometime. I managed to get a very small fraction of it done in Thunderbird through tagging an

I have been wanting this functionality for my mailbox since quite sometime. I managed to get a very small fraction of it done in Thunderbird through tagging and filters. I pretty much generate a Todo list out of the messages by tagging. But I want more: reminders for these items; setting a deadlines and the amount of time it takes to finish items so that they will get auto-arranged and they present themselves when I have to pay attention. It should not be that hard to get this done by integrating calendar right into the inbox. I have thought of doing this as a Thunderbird add-on, just haven't gotten around to doing it.