※ 필수입력정보 ※

▷ 제품버젼 : 3.7 (MDB)

▷ 오류발생 메뉴/주소 :

▷ 에러메세지 : Delivery Failure

▷ 질문내용 :

NOTICE: Delivery Failure.

This Delivery Status Notification is sent from MTA..

Your delivery to the following address has been failed.
Please refer to the below for details.

===================================

:
xxx.xxx.xxx does not like recipient.
Remote host said[Response Message]: 450 4.7.1 : Helo command rejected: Host not found
Giving up on xxx.xxx.xxx.xxx.
: STEP=[RCPT TO]I'm not going to try again; this message has been in the queue too long.

해당 리턴메시지가 나오며 기존에 계속 메일 주고받던 업체입니다.

확인부탁드립니다.