메일서버의 환경에서 SMTP HERO/EHLO를 설정하여 확인중인데 아래와 같은 리턴메일을 받았습니다.

자주 BlackList에 등록이 되어 잘못된 설정을 변경하기 위해 적용한 것입니다.

정방향 및 역방향 DNS는 올바르게 설정이 되어 있습니다.

에러 메시지는 아래와 같습니다.

550 *** The HELO for IP address 1X.6X.1XX.2XX was 'mail.도메인' (valid syntax) ***

추가로 설정해야하거나 확인할 사항이 무었인지 답변 부탁드립니다.

감사합니다.

▷ 제품버젼 : Nmail PHP 2.6.11 UTF-8

▷ 반송메일 내용 :

[<00>] XMail bounce: Rcpt=[****@****];Error=[550 *** The HELO for IP address 1X.6X.1XX.2XX was 'mail.도메인' (valid syntax) ***]

[<01>] Error sending message [***-****-*******-****-****80.23.eml] from [도메인].

ID: <S39475B>

Mail From: <skygon@도메인>

Rcpt To: <****@****>

Server: <ec2-54-93-50-35.eu-central-1.compute.amazonaws.com> [54.93.50.35]

[<02>] The reason of the delivery failure was:

550 *** The HELO for IP address 1X.6X.1XX.2XX was 'mail.도메인' (valid syntax) ***

[<04>] Here is listed the message log file:

[PeekTime] ***-****-**** : Thu, 5 Nov 2020 17:06:29 +0900

<<

ErrCode = -82

ErrString = [RCPT TO:] not permitted by remote SMTP server

ErrInfo = 550 *** The HELO for IP address 1X.6X.1XX.2XX was 'mail.도메인' (valid syntax) ***

SMAIL SMTP-Send MX = "mail.abuseat.org." SMTP = "도메인" From = "skygon@도메인" To = "****@****" Failed !

SMTP-Error = "550 *** The HELO for IP address 1X.6X.1XX.2XX was 'mail.도메인' (valid syntax) ***"

SMTP-Server = "mail.abuseat.org."

>>

[<05>] Here is listed the initial part of the message:

Received: from localhost ([127.0.0.1]:47538)

by taewool.co.kr with [XMail 1.22 PassKorea120228 ESMTP Server]

id <S39475B> for <****@****> from <skygon@도메인>;

Thu, 5 Nov 2020 17:06:29 +0900

MIME-Version: 1.0

To: ****@****

From: "=?utf-8?B?67CV7ZWc7Jqp?=" <skygon@도메인>

Subject: mail test

Date: Thu, 05 Nov 2020 17:06:29 +0900

Message-id: <***-****-****.8379@도메인>

X-Mailer: Passkorea.NET Nmail PHP, Build 20130311

Content-Type: text/html; charset="utf-8"

Content-Transfer-Encoding: base64