Ability to add a SMTP/Sending account

Would be great to have the ability to add a SMTP/Sending account, and apply that you any other account you have installed.

At the moment the only way to do this, is to add a SMTP account, and at the same time add a fake pop3/imap account.  unfortunately this means that you can’t set this account as default, since the pop3/imap account is fake.

Thunderbird has this feature already.