I'm trying to delete emails from Mail (on my macbook pro) but I keep getting a message saying "Message can't be moved to trash. File exists"
How do I get around this.
Try rebuilding the mailboxes first, so that Mail's indexing is up to date. After that's done, try the deletion again.
To rebuild the mailboxes, in Mail's menubar choose
Mailbox > Rebuild
(it's the last command in the menu)
Retrieving data ...