def _remove_reserved_attributes(attributes):
    """
    Removes elog reserved attributes (from the attributes dict) that can not be sent.

    :param attributes: dictionary of attributes to be cleaned.
    :return:
    """
    if attributes:
        attributes.get('$@MID@$', None)
        attributes.pop('Date', None)
        attributes.pop('Attachment', None)
        attributes.pop('Text', None)
