I have been searching why I cannot Add my ENS to my identities in ETHMAIL (i.e. sohrab@ethmail.cc) and I have found this to be a general problem for most users. As a result I have found this would get fixed after choosing "Primary ENS Name" in ENS app. So It would be greatful if we add a description bellow "from" field in compose (or inside "identities" in setting tab) which inform users how they can exhibit from nice ENS identities as sender mail address.