Worst email client ever

This is the worst mobile email client ever. In addition to enormous amount of different bugs this client doesnt have the very basic crucial functions:
- show only unread messages (or go-to next unread)
- show threads (aka conversations)
- search email in all folders but not only in one you are currently work with
- show in one view all your mails (inbox, folders, sent etc.)
It at least 8 months Im forced to use this application and it is irritating more and more each day.
- Background refresh

Mr.Quango about Work Connect for BES12, v1.0.22735.