Thunderbird not only should have the option to change this, but should act like this by default. This is the way gmail, outlook, and all the other big email clients work. Opening by default an email that you didn't want to open can be a BIG SECURITY ISSUE, despite being annoying too.
Thunderbird not only should have the option to change this, but should act like this by default. This is the way gmail, outlook, and all the other big email clients work. Opening by default an email that you didn't want to open can be a BIG SECURITY ISSUE, despite being annoying too.