Failed email confirmations

Hey all, I'm ~thewithz. Trying to confirm my address has resulted in an email reply explaining that the confirmation code did not match. As far as I understand it, I just need to reply to the email with the same subject right? Mutt is a little tricky, because they insert a "RE:" by default, but removing that has not lead to any further success. Any advice? Do I even need to confirm the address?