iCloud Inbox is suddenly empty

Hello Tope76,

We have a great support article that might help with this. Please take a look at it here: If emails appear to be missing in Mail on Mac. Follow this guidance:

• "If you use more than one email account in Mail, make sure you’re looking at messages for the correct account.
• If you sorted messages, they may be in the list but not in the order you expect.
• If the missing emails are from a specific person or group, check whether you blocked messages from them.
• If you use rules, they may have moved messages to other mailboxes. Try searching for the messages.
• Check the account’s Recovered Messages mailbox, if available in the Mail sidebar.
• Quit Mail, then reopen it."

Additionally, the steps in this support article might also help: If iCloud Mail isn't working.

We hope this helps. Let us know if we can assist with anything else at all. Take care.