Hey again! So all the other iCloud data on the web site loads just fine? (You know, Contacts, iCloud Drive, etc, etc) on the web site?
I know that sometimes the iCloud storage gets so full that it will stop loading data, including Mail, which may make sense if it shows up on your Mac, (Pre existing mail), but not on the web site), how much available space do you see in iCloud?
(System Preferences > Apple ID > iCloud > Manage Storage).
Also to confirm do new emails show up in the Mail app, and/or on other devices? (If able to test).
If that’s not it, (Even though your Wife’s account loads fine), we’re you able to test on another network, (Even hotspot)? Or on another user account?
I know you said it shows up fine on iPhone, but I was just wondering about new emails coming through. Of course if it’s the same on other devices and other networks, it would probably be an account issue, whether storage or something Apple needs to fix.
There was an outage with iCloud I believe last week, but although it’s fixed, may be related if not the other stuff.
And of course if new emails ARE coming through on other devices, and the storage is just fine, it’s probably either an issue with the OS (Considering two web browsers), the network, (Though it loads fine on her account), or some account or user preference/setting, if not storage.
I’d say the most revealing tests are, (Considering you’ve already tested two browsers and a different Apple ID), are still:
Connecting to another network
Signing in on another admin account
Signing in while I’m safe boot
I’ve seen some glitchy, strange behaviors in the past so nothing would suprise me, just let me know!