You should be asking this in the dedicated thread for email issues/discussion.
http://talk.maemo.org/showthread.php?t=78480&page=40
There's even a Nokia dev there that responds regularly to help-out (Sergey).

Search it 1st though, so he doesn't have to waste his time repeating what he may've already explained.
As he could be using that time to improve our Maemo6x experience instead.