Originally Posted by Infinyte8
as in when replying to a poped email sent to me, and a different from address when replying to an email sent to my blackberry.net address?
Run a search for things like this, and I assure you there will be many posts for you to find your answer.
Only T-Mo has the current BIS features which allows you to use more than one From address when sending/replying to email. Any other carrier only allows you to use one, which you may determine in the BIS settings. There is a program called BBReply that allows you to set the Reply To address to something other than a single address, but it does not affect the From field. Therefore, when sending/replying the recipient will only see the predetermined From address you chose in your BIS settings, BUT if that person hits Reply to send you something back, the new email will autopopulate the To field with whichever Reply To address you specified when you sent the original email to him/her. Until other carriers get their BIS upgraded, this is as good as it gets.