Junk in Mail App
I have been receiving emails from a good, close friend for over a year, and each time he emails me it goes into my Junk folder. I have - many, many times - both (a) moved it from Junk to my In Box and (b) designated it as "Not Junk" but it continues to come into my Junk folder. How can I stop this and make it so it goes naturally into my regular In Box? It's embarrassing (he keeps asking why I haven't responded) and its frustrating as ****! Thanks!
iMac with Retina 5K display, macOS 10.15