Did you rebuild your email inbox?
The original INBOX.mbox does not go anywhere when you rebuild the mailbox. It is not replaced or deleted during the rebuild process, but problems can occur if the .mbox has severe corruption or the mailbox is at or over the recommended size limit for a mailbox.What is your hard drive capacity and available free space?
Ok, so plenty of free space...
Can you locate the .mbox file? What size is it?
It should be located in the Mail folder of the user directory.
You may need to enable hidden files:
Hold down the Option key while using the Finder“Go To Folder” command, and enter ~/Library/Mail
Ok, but you cannot find a recent .mbox file anywhere?
Have you tried using Finder to search the entire Mac?
Ok, that is likely your most recent email information file - what size is it?
No, that doesn't sound right.
Who is your email provider? e.g. Gmail
Your email may actually be on the Bluehost mail server then - can you let me know if you can see your emails when you log in at:
You can search again using Finder - do a search of your entire Mac using finder to look for any *.mbox files.