Hello Psfromkw,
Thanks for posting in the Apple Support Communities.
We understand there seems to be a problem with connecting to iCloud Mail on your MacBook, right?
Let's get started with the steps below to see if this may clear up what's occurring. If not, the remaining steps of the related resource may help with this.
If iCloud Mail isn't working
Things to check first
1. Check the system status of iCloud Mail.
2. Check that you turned on iCloud Mail:
• On your Mac, open the Mail app then choose Mail >Preferences. Click Accounts, then select your iCloud account in the sidebar. Under Account Information, make sure that the account is turned on and the status is online.
• On your iPhone, iPad, or iPod touch, go to Settings > [your name] > iCloud and check that Mail is turned on.
3. Make sure you that haven't exceeded your iCloud storage limit. If you exceed your iCloud storage limit, learn how to make more space available in iCloud.
4. Make sure that you're using the latest version of software on your device.
If that doesn't help, let's see if you can isolate this by testing in a different user account. Let us know the results if this continues with a test user account to help us gain a better understanding. For assistance with adding a new user account, check out the following resource: Change Users & Groups settings on Mac - Apple Support
Have a great day!
