And in Thunderbird 68.12.0 (32-bit), every blessed group I'm subscribed to, if I hit the Reply Button or CTRL+R for one of those messages, puts the group posting addressin the To for that reply.

What's even more interesting, to me anyway, is that the From: field on every blessed one of these messages contains the actual e-mail address of its sender.  So Thunderbird is honoring the Reply-To in the message header.  I can't get it to place the sender's address in the To on a reply for love nor money, and CTRL+R certainly doesn't put it there.

--

Brian - Windows 10 Pro, 64-Bit, Version 2004, Build 19041  

Always remember that computers are just glorified light bulbs - they rarely fail in continuous use and usually go pop when turned off and on.

        ~ Technician with the username Computer Bloke, on Technibble.com