When you make a smart mailbox, does it copy the files from your accounts in to the smart mailbox, meaining you can delete them from the orginal mailboxes? or does it simply make an alias to the emails in the mailbox, providing one location for them? because if you make a regular mailbox folder and manual drag it in it removes the email from the account which it doesn't do with a smart mailbox. Anyway trying to clean some stuff up and i'd like to know. thanks.