Is it possible to use an iCloud email alias as the Caller ID for iMessage?
When I try to enter an alias on "Receive At > Add Another Email..." I always get an error popup titled "iMessage Activation" - "An error occurred while verifying your email". I've also tried to go to appleid.apple.com and enter one alias. When I press save, the page shows some loading activity but stays the same and never saves the alias. I've tested it both on Safari and Firefox. With other email addresses it works fine.