def search_for_subject(self, subject, timeout=None, content_type=None):
        """
        Get content of emails, sent to a specific email address.
        @Params
        email - the recipient email address to search for
        timeout - seconds to try beore timing out
        content_type - type of email string to return
        @Returns
        Content of the matched email in the given content type
        """
        return self.search(timeout=timeout,
                           content_type=content_type, SUBJECT=subject)