Stack Exchange network consists of 175 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.
I'm deleting email account from Mail App but it doesn't automatically deleting the email caches. There are still about 2 GB left in the ~Library/Mail/v4
Is it safe to delete all folders under the ~Library/Mail ?
If you already deleted the emails, the cache will be deleted when the operating system needs more space. You can also delete the folders in ~Library/Mail/v4, only the next time you launch Mail it will write there when you add a new account.