I have an email account and two possible email addreses (in the same account). Both addresses are addressed to this one account. Downloading the emails make all emails be stored up in the inbox folder. I used filters and subfolders to devide emails from the one address and the other one. Now, emails are devided correctly.
But I face another problem. Why isn't it possible to make the folder sending emails with another address than the normal inbox? We don't forget, I have two addresses, one inbox and one subfolder. I could imagine a check box in the server preferences to allow entering another from-email address for answering a mail being within this subfolder.