Thunderbird Support Forum

I've just now noticed the Threading automatic default grouping/marking of messages, and it is appalling. Thunderbird/Mozilla either needs to eliminate this (with appropriate warning notices, perhaps) or at least give us the ability to NOT link various messages. It's not only vastly annoying, it can cause severe real-world problems if anyone not in the CC or BCC fields is receiving these messages that were not intended for them.

I suppose for now, the only way to NOT link things that were never meant to be would be to change the Subject when discussing important topics.

Either that, or get a whole new mail service, which I'd prefer not to have to do.

In one of my folders used just for certain emails then are now disappearing and to get them back I have to click " show only emails from people in my address book. That is not always the case depending on the sender. Got a fix ?