I use my.name@domain.com as my general e-mail address, and use it as my main identity. I also have an old address, old@domain.com that redirects to my main mailbox and that some people still use.
Now, if I get e-mail with To: old@domain.com and use Thunderbird's "reply all" button, it puts old@domain.com on Cc:, which is something I do not want.
Mozilla forums seem to suggest enabling reply_to_self_check_all_ident setting, but that does not work for me, even though I have the old address added as a secondary identity. Is there any other way to force this, perhaps an extension that would allow me to have a list of e-mail that will never be put on Cc?
