LOL why bother with IMAP on windows mobile at all? Seven Beta is justice severed over Push Gmail, Yahoo, Live mail etc...
Seven Beta email, FREEWARE unlike another sad WinMo push email service.
http://community.seven.com/forum/main.php
Besides I like to hit send & it sends the email & the attachment/s on my Windows Mobile.
And I like to receive instantly and automatically rather than worry about hitting send/receive.
Syncing my Goolge Calendar & remote contact search is an added freebie from Seven too.
I do agree about the readability but as far as the other features go, you can get them free for your phone y'know?