def post_to_url(self, value):
        """An Inbound Parse URL to send a copy of your email.
        If defined, a copy of your email and its spam report will be sent here.

        :param value: An Inbound Parse URL to send a copy of your email.
        If defined, a copy of your email and its spam report will be sent here.
        :type value: string
        """
        if isinstance(value, SpamUrl):
            self._post_to_url = value
        else:
            self._post_to_url = SpamUrl(value)