macOS message not delivered.
I prefer to write my sms/mms/imessages on the macOS messages app. But when I send, I get the message "Not delivered." with the red !.
when I send a iMessage, the message does in fact go through, but I still get the not delivered message.
This is also a problem on my iPad (cellular) so I suspect it is a sync issue with my iPhone.
Thanks for your help
Manny
iMac 27″ 5K, macOS 10.15