Hello. Lately, when I try sending messages from Messages.app on my MacBook Air (purchased last year, running Yosemite) to iPhone users, they fail to go through and show up as "Not Delivered" every time. Until a couple of weeks ago, I was able to use Messages with these same iPhone users without any problems. It still works fine with other MacBook users.
I have tried quitting Messages, rebooting, and signing out and signing back in, and the problem persists. Any suggestions? Thanks.
I have tried quitting Messages, rebooting, and signing out and signing back in, and the problem persists. Any suggestions? Thanks.