Email text characters are coming in as (?) marks inside boxes
This has just started a couple days ago. I've run Font Doctor and everything checks out ok. According to FD. I'm reading that it could be something with the sender's font verification. But these are vendor emails. Not all but about 50% of what is coming in. Haven't had this issue for years.
Running OS 11.5.2. All apps up to date.
iMac 27″, macOS 11.5