If you get this message: "Mail cannot save information about your mailboxes because there isn’t enough space in your home folder"...
Check for a home directory access/permissions issue, then try deleting the file "Envelope Index-journal" in ~/Library/Mail or ~/Library/Mail/V6/MailData
Or from the terminal: either for older versions: cd ~/Library/Mail or for newer versions: cd ~/Library/Mail/V6/MailData Then: rm Envelope\ Index-journal
That will force the sqllite database to reindex which will help if a corrupt index has caused this error.
I usually write a blog post about once a week. The latest post can be viewed here: Learning from Failure: I think there is a place for parties with views I find insane. (posted 2024-11-28 at 12:41:49). I do podcasts too!. You can listen to my latest podcast, here: OJB's Podcast 2024-08-22 Stirring Up Trouble: Let's just get every view out there and fairly debate them..