cross-posting from mozillazine:
Would be really nice if I could mark a number of emails, and send a new message to all senders (and optionally other recipients). By marking I mean the normal process of selecting mails with shift and mouse cursor or cursor keys.
The situation I envisage is when you've just sent out some instance of mass communication (a press release, say), and ten people get back to you with the same question. Select those emails, click "send to all", write, send off - simple? I think so. And useful. It's very Apple, but they haven't come up with it yet!
You could even give people the option to save the list into their address book after they send the mail, similar to the way that Yahoo mail always asks.
tags:email,mozilla,email client,thunderbird,thunderbird extension,feature request