'Save the recipients for this message
:param um_to_user_list:
A list which elements are :class:`User` to whom the message is for.
:return:
Boolean indicating if any users are saved.'

def save_recipients(self, um_to_user_list):

    created = False
    for user in um_to_user_list:
        MessageRecipient.objects.create(user=user, message=self)
        created = True
    return created
