My bad old German email address has been hacked and is sending spam to everyone I know. I want to send a change of address to everyone in my Thunderbird address book in such a way that they don't all get a long list of addressees.
And then, obviously, close the guy down - this I can handle.
If I go into Address Book, select all addresses and click Write, it generates a new email with many, many, many, many To fields filled in (no option offered to make them all bcc's).
I have the mail merge plug-in and have looked at the instructions, but I don't quite see what I need to do to pick up everyone in my Address Book. Sorry to waste the superpowers of Stack Overflow on this paltry problem, but I have searched and searched and answer comes there none.