Comment 0 for bug 52667

When replying to a mailing list, I have to do replyall (get a compose window
with To: sender and CC: list), then delete the sender, then change the list from
a cc to a to.

The mailer should do that for me, with a reply-to-list command, which would
reply to the message's Resent-From header, if any, or its To header, if not.

(If there's no Resent-From header, and multiple To headers, then it would
probably have to go To all the recipients. Perhaps it should go Cc all the
recipients even if there's a Resent-From, and To the Resent-From.)

The button could easily be added in JS, and I'd be happy to do that, but getting
header information about the current message might be harder (is there any way
to do that from JS?) so I'm initially assigning it to JF (expecting it will be a
HELPWANTED sort of thing). If you could offer any hints about how to get the
header info, it would be much appreciated and I'll try to find time to do the
rest.