I agree. When replying to an email Thunderbird should use the address in the received email rather than the default identity in settings. I have a number of email addresses that I use for different purposes and I have to constantly change my outgoi...
I've been using T-bird since the 1990's as well. I have found what I believe to be the same issue: The columns in mail folders are ordered in what appears to be a random sequence when a folder is first created. It seems the most logical sort order...