MYB-958 Block email creation by client-side sendMessage until we can support user delivery preferences.
MYB-958 Block email creation by client-side sendMessage until we can support user delivery preferences.

rhollow/MYB-1615,ets-berkeley-edu/3akai-ux,ets-berkeley-edu/3akai-ux,jonmhays/3akai-ux,jonmhays/3akai-ux,jonmhays/3akai-ux,rhollow/MYB-1615,rhollow/MYB-1615,ets-berkeley-edu/3akai-ux