For years, I was deleting messages in Mac Mail POP thinking they would be erased from my local drive. However, I see that they did not erase from the drive and my mail file where all the emails are stored (user/Library/Mail/) is 40GB. To free up space, I would like to delete many unwanted emails (and attachments) from that folder. Viewing and deleting the unwanted emails one-by-one in Finder would take a lifetime. Hoping to use Mac Mail to more easily/quickly view, organize and group delete all these unwanted emails. Is there a way to view ALL of my emails in the user/Library/Mail/ folder in Mac Mail? Would re-importing the mail folder work? Or any other ways to achieve it? Thanks in advance!