자세한 것은 https://support.google.com/mail/answer/81126#authentication 에서 살펴보라고 합니다.
현재 메일 서버 IP인 211.114.252.24에 ptr 레코드가 등록되지 않았습니다.
아래 링크를 참조하여 등록하시기 바랍니다.
그리고 메일 서버에서 메일이 대량으로 발송된 것은 아닌지도 아래 링크를 참조하여 점검해 보시기 바랍니다.
https://www.passkorea.net/Board/ViewDoc.aspx?brdNo=8&docNo=43312
-------------------- Original message --------------------
※ 필수입력정보 ※
▷ 제품버젼 :Nmail4_5
▷ 오류발생 메뉴/주소 :
▷ 에러메세지 :
▷ 질문내용 :
메일을 발송시 이런 return mail 을 받았습니다.
원인및 해결방법을 알고싶습니다.
---------- Original Message ----------
From: "brmh.org PostMaster"
<****@****>
To: 3****@b***.org
Sent: 2018-06-01 오후
3:46:05
Subject: [Return Mail] 421-4.7.0 This message does not have
authentication information or fails to pass
[Send Fail
Message]
421-4.7.0 This message does not have authentication information or
fails to pass
421-4.7.0 authentication checks. To best protect our users from
spam, the
421-4.7.0 message has been blocked. Please visit
421-4.7.0
https://support.google.com/mail/answer/81126#authentication for more
421
4.7.0 information. z9-v6si41574352pll.423 - gsmtp
================
Original Message Header ================
>> ReTryCount:2
>>
ReTryDate:20180601154602
>> ReTryCount:1
>>
ReTryDate:20180601154600
>> ReTryCount:0
>>
ReTryDate:201806011541
>> MAIL FROM:<36***@b***.org>
>>
RCPT TO:
>>
CONNECTIP:
>> IPCHECK:
>>
Mail_Kind:2
>> x-nmail-delimiter: NMAIL_DELIMITER
>>
Message-ID: <2009f903_af59_42d7_9da6_50117a14****@b***.org>
>>
From: "=?ks_c_5601-1987?B?sejC+cij?=" <36***@b***.org>
>> To:
"=?ks_c_5601-1987?B?wNPBpMi/?=" <05***@b***.org>
>> Cc:
"=?ks_c_5601-1987?B?w9bFwr3EIMH3v/ggwMe34cGkurjGwA==?="
<52***@b***.org>
>> Subject:
=?ks_c_5601-1987?B?yK/A2iC47bTcILzbus4=?=
>> Date: Fri, 01 Jun 2018
15:41:35 +0900
>> MIME-Version: 1.0
>> Content-Type:
multipart/mixed;
>>
boundary="----=_nWmail_NET_NextPart_06eea1ee_b0e2_4db6_9673_ddc90bd4fa22_=----"
>>
X-Mailer: nWmail.NET by passkorea.net