Hi Federico,
* Federico Bruni brunology@gmx.com [2009-12-10 10:17:56 +0100]:
Thunderbird is an example: if I choose Reply it replies just to the sender, if I choose Reply all it replies to the sender and cc the list (just like in this email). But I've found out right now this addon (Reply to mailing list): https://addons.mozilla.org/en-US/thunderbird/addon/4455
I added it to https://wiki.fsfe.org/Fellows/mk/EmailGuide under "User Comments".
Thanks, Matthias