using terms from application "Mail"
    on perform mail action with messages matchingMessages for rule theRule
        repeat with newMessage in matchingMessages
            set msgMailbox to the mailbox of newMessage
            set msgAccount to the account of msgMailbox
            set subj to newMessage's subject
            if subj contains "Item Delivered" or subj contains "Expected Delivery" then
                set trackNum to the last word of subj
                set (the mailbox of every message in msgMailbox whose sender contains "auto-reply@usps.com" and subject contains trackNum and date sent is less than newMessage's date sent and deleted status is false) to mailbox "Trash" of msgAccount
            end if
        end repeat
    end perform mail action with messages
end using terms from