'Create a new message in the queue.
@rtype: 2-L{tuple} of (E{1}) L{file}, (E{2}) L{FileMessage}
@return: The envelope file and a message receiver for a new message in
the queue.'

def createNewMessage(self):

    fname = ('%s_%s' % (time.time(), id(self)))
    headerFile = open(os.path.join(self.directory, (fname + '-H')), 'wb')
    tempFilename = os.path.join(self.directory, (fname + '-C'))
    finalFilename = os.path.join(self.directory, (fname + '-D'))
    messageFile = open(tempFilename, 'wb')
    return (headerFile, mail.mail.FileMessage(messageFile, tempFilename, finalFilename))
