PERFECT description of my dilemma!
I third, fourth, fifth and so on this!
This a critically missing feature in every email service and client I
have used.
It is nice that at least most send replies from the correct addresses,
but when creating NEW emails, it is all too easy to forget to check
the "from" address.
PLEASE! PLEASE! PLEASE! SOMEBODY COME UP WITH A PLUGIN OR SOMETHING
THAT GIVES US THE ABILITY TO CHOOSE "NONE" FOR A DEFAULT ADDRESS!!!!!
I've been looking for this for YEARS!