My iiCloud account is firstname.lastname@example.org. I have created 2 email aliases (email@example.com and firstname.lastname@example.org). When I go to my iPad Mini 3 or iPhone 6 Plus and accessed Settings --> Messages, I see that I can only use email@example.com for iMessage, but not the other. So in the Settings, I can use the following for iMessage: - My phone number - Primary account: firstname.lastname@example.org - Email alias: email@example.com I cannot see firstname.lastname@example.org. When I attempted to add it manually, I got an error that iOS cannot verify the email. Is there a limit on how many iCloud email alias you can use for iMessage? If yes, how do I switch the email aliase to use iMessage? I.e. use email@example.com instead of firstname.lastname@example.org.