IMAP and Android

IMAP and Android

I have tried to configure several different email apps on my Android to use the newly-released IMAP functionality in Zoho.
All appears well except for the small problem of no email being displayed!
My zoho folders are displayed and when it is loading emails msgs, it displays 0/7 (or however many emails are in my zoho inbox) but the messages themselves never are displayed.
One of the apps I tried (K-9 email) gives a hint at the problem... it says "Unparseable" after trying to load messages.

Please help asap!

Thanks,
Mark Scacco