iMessage is great way to send and receive text and multimedia images with any iPhone, iPod touch, or iPad running iOS 5 or higher, as well as any Mac running OS X Mountain Lion. Along with receiving iMessages at your phone number on the iPhone, you can receive iMessages at your Apple ID email address on iOS and OS X as well. But what if you've got more than one email address and you want to be able to use all of them with iMessages?
