So I had to exchange my iPhone and now I'm having issues with my new one with Messages on my iMac. When I send out an iMessage from my iPad and iPhone it sends out from my phone number. From my iPad, iPhone, and iMac it can receive messages at my phone number, email 1, and email 2. But for some reason it sends out messages from my iMac from email 1. And I want it to send out from my phone number. How do I get it to?