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▷ 에러메세지 :

[Send Fail Message]
421 4.3.2 Your ip blocked from this server UO4WA0vqQ1+cJuzqdzKkqg - nsmtp


================ Original Message Header ================
>> ReTryCount:2
>> ReTryDate:***-****-****454
>> ReTryCount:1
>> ReTryDate:***-****-****451
>> ReTryCount:0
>> ReTryDate:***-****-****951
>> MAIL_FROM:<****@****>
>> RCPT_TO:<****@****>
>> CONNECTIP:<221.150.2.138>
>> IPCHECK:<FALSE>
>> Mail_Kind:2
>> x-nmail-delimiter: NMAIL_DELIMITER
>> received-SPF: NONE
>> Received: from mail (221.150.2.138)
>> by doctoru.kr (192.168.1.3) with [NMail5 Ver 5.0]
>> for <****@****> from <****@****>;
>> Thu, 09 Jan 2020 10:49:51 +0900
>> X-Nmail5-RBL: NONE
>> thread-index: AdXGjxVSLOupOBnGQo+L4kM7iBlrkQ==
>> Thread-Topic: =?ks_c_5601-1987?B?J7Taxc1VwMcgyK2/5Ly8ucyzqicgwvywob3Fw7sgvsizuw==?=
>> From: =?ks_c_5601-1987?B?tNrFzSBVW7nfvcXA/L/rXQ==?= <****@****>
>> To: <****@****>
>> Subject: =?ks_c_5601-1987?B?J7Taxc1VwMcgyK2/5Ly8ucyzqicgwvywob3Fw7sgvsizuw==?=
>> Date: Thu, 9 Jan 2020 10:49:51 +0900
>> Message-ID: <****@****>
>> MIME-Version: 1.0
>> Content-Type: multipart/alternative;
>> boundary="----=_NextPart_000_005F_01D5C6DA.853A5360"
>> X-Mailer: Microsoft CDO for Windows 2000
>> Content-Class: urn:content-classes:message
>> Importance: normal
>> Priority: normal
>> X-MimeOLE: Produced By Microsoft MimeOLE

================ Message Truncated ================

▷ 질문내용 :  

CDO 컴포넌트로 메일을 발송을 하면 네이버만 

전송이 안 되네요.

화이트 도메인도 등록을 했는데 

혹시 원인을 알 수 있을까요? 

최근에 메일 서버를 이전을 했습니다.

현 서버 IP : 221.150.2.138