421 Service not available
위메시지의 원인은 상대방 서버의 문제라서 정확이 어떤상태인지 알기 힘듭니다.
( 상대방측의 서버가 복구되어야 메일이 전달 가능할것으로 보입니다)
-------------------- Original message --------------------
421 Service not available 리턴이 됩니다.
어떤 이유인지 알 수 있나요?
--------
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.
------------------------------------------------------
Delivery failed: ****@**** Connected to 173.xxx.xxx.xxx but
greeting failed.
Remote host said[Response Message]: 421 Service not available, closing
transmission channel I'm not going to try again; this message has been in
the queue too long.
