This is frustrating me no end. I have three email accounts set up in Mail, and I have set the preferences on all of them to never permanently delete trashed messages. However, I am constantly unable to find any messages from certain correspondents after messages are more than a day old. I don't know whether these messages are being permanently deleted or whether they are somehow being hidden by Mail. I can see no reason why certain correspondents' messages drop off whilst other remain. Can anyone help?!