I can't receive emails from my sister thanks to Apple. I have contacted Apple support, and they (tier 2, supervisors) promised several times to reach back out, so I wouldn't have to wait through the whole process again and start all over with new people, but of course they never did. This occurred with the Junk filtering disabled on my Mac, and persists after enabling it. They are not the color of the Junk messages, yet they are in the Junk folder. I have lots of emails in my Junk folder like this. Obviously this address is in my Contacts, as it is my sister.

For instance, messages from my sister's iCloud address ALWAYS go directly to the Junk folder, but ARE NOT marked as Junk: the color of the text does not get changed, and there is NO 'Mark as Not Junk' anywhere in the interface. They are simply moved to the Junk folder, seemingly before they ever get to any of my devices (server action). It is important to note that THESE MESSAGES DO NOT GET MARKED AS JUNK. Several of my emails each day go to the Junk folder.

I have been dealing with this issue for some time as well.