10-24-2013 10:21 AM
I'm extremly glad to report that RIM has finally resolved the ongoing "protocol layer" failure to send email from certain types of accounts.
A while back they post this not working solution:
KB33736 "Protocol layer was unable to send a message" when replying to an email on the BlackBerry 10 smartphone
Resolution: Upgrade to BlackBerry 10 OS version 10.1.0.1465 or higher. Contact the wireless provider to confirm availability.
10.1.0.1465 or higher FAIL
But 10.2 WORKS - Woohoo