Richard Damon writes:
Thunderbird isn't quite like that, but when I reply to a message from the list I am given 3 options:
Reply Reply All Reply to List
The Reply to List option is made available by the List-Post header I believe.
I don't understand why they do it this way. If I were writing an MUA, I'd make each addressee a button which replies to them only.[1] For the explicit reply button, I'd automatically put the list-post and author in To:, provide an obvious delete button on each (as Gmail does), and provide an "add other addressees" button in Cc:.
As it happens, on XEmacs lists about half the people who are most likely to end up in "reply-all" cc lists *want* to be cc'd because their filters put general list traffic in a folder they read much less frequently, but replies to their own posts they want to read immediately, so I've never coded it.
It's a very difficult UI/UX problem, I think.
Footnotes: [1] The alternative use for active regions over an addressee would be to provide contact list information, but I would do that in a tooltip.