※ 필수입력정보 ※

▷ 제품버젼 :

▷ 오류발생 메뉴/주소 :

▷ 에러메세지 :

▷ 질문내용 :

554 Your access to this mail system has been rejected due to the sending MTA's poor reputation. If you believe that this failure is in error, please contact the intended recipient via alternate means[****@****]

이런 리턴 메일이 오는데..

어떻게 해야하나요?