Not sure this is the right place but here goes. I have a problem with iMessages on my iPhone 7plus, iPad Pro, and 2016 iMac. I can receive messages and they showup on all devices at the same time. But when I send a message it only show on the device I send it from. I have followed a bunch of google suggestion but nothing seems to work. Also signed out of iCloud on all devices and signed back in. No help. don't know what to try next.