I have a Gmail account and a second email address. The mail from this second address is forwarded to the Gmail address. I use Thunderbird to read my email, but there's a little problem with the Reply2All feature. See, I have one of the addresses registered as my email address in Thunderbird. If somebody sends me an email on the other address, and I click reply 2 all, it doesn't recognize that address as mine, so it adds it to the recipient list -> I am mailing myself. Anything I can do to fix this? Some way to let TB recognize both addresses?
If you set up another identity on the account as detailed here with the alternate e-mail address does that work?
I can't test this myself at the moment as I don't have Thunderbird installed on this computer.