So maybe thunderbird isn't ideal for you because it keeps changing... but I do know for a fact you can disable auto updating in Thunderbird. I would much rather

So maybe thunderbird isn't ideal for you because it keeps changing... but I do know for a fact you can disable auto updating in Thunderbird. I would much rather set up a 75 year old with something that will stay the same AND allow installing older versions, than something I don't fully trust will obey the "Disable auto-updates" checkbox.