Deleting messsages in Windows Mobile

I am having problems deleting messages in Windows Mobile

https://forums.microsoft.com/WindowsMobile/ShowPost.aspx?PostID=3731443&SiteID=65

https://forums.microsoft.com/WindowsMobile/ShowPost.aspx?PostID=2299904&SiteID=65

This mail client is so underpowered it is unbelieveable. I'm actually considering buying a third-party e-mail client.

http://modernnomads.info/wiki/index.php?page=Alternative+Mail-clients

FlexMail 4 is intereting, but I don't really want to pay $30 for something that should be part of the OS

http://www.webis.net/products_info.php?p_id=mail&dir=wm&tab_id=introduction

And MS wonders why Windows Mobile is lagging.