特定の相手先のみ逆引き不具合のようなエラーがでてメール送信が ...

  1. https://helpcenter.gmocloud.com
  2. rapidsite
  3. article
  1. https://helpcenter.gmocloud.com
  2. rapidsite
  3. article

2023/10/13 -... refused to talk to me: 450 4.7.1 Client host rejected: cannot find your reverse hostname, [名前解決できないIPアドレス]. このような場合、送信 ...


SMTPサーバーの逆引きエラーについて - EatSmartシステム部ブログ

  1. https://eatsmart.hatenablog.com
  2. entry
  3. 2019/12/03
  1. https://eatsmart.hatenablog.com
  2. entry
  3. 2019/12/03

2019/12/3 -逆引きエラーが発生した際のSMTPサーバーのログには下記の様なエラーが出力されます. Client host rejected: cannot find your reverse hostname, [ ...


メールが相手先から拒否される場合の対処 - ライタス株式会社公式ブログ

  1. https://blog.litus.co.jp
  2. 2018/08
  3. blog-post
  1. https://blog.litus.co.jp
  2. 2018/08
  3. blog-post

2018/8/16 -... エラーが出てメールが戻ってきてしまいました。 こういう時は、内容をよく読むに限ります。 5.7.1 Client host rejected: cannot find your hostname, [XX ...


450 4.7.1 Client host rejected: cannot find your hostname - Plesk Support

  1. https://support.plesk.com
  2. en-us
  3. articles
  4. 1237714009...
  1. https://support.plesk.com
  2. en-us
  3. articles
  4. 1237714009...

2024/4/18 -Cause. Incorrect or missing PTR record of the sender's mail server. Resolution. Contact the server hoster or provider of the IP address in order ...


RCPT from unknown[]: 450 4.7.1 Client host rejected: cannot find ...

  1. https://serverfault.com
  2. questions
  3. reject-rcpt-from-unk...
  1. https://serverfault.com
  2. questions
  3. reject-rcpt-from-unk...

2022/8/28 -As far as I can tell, the error message is "reverse hostname" related. I am outside my normal hostname. But Thunderbird should log in and still ...


554 Client host rejected: cannot find your hostname - Parabon NanoLabs

  1. https://parabon-nanolabs.com
  2. reverse-dns
  1. https://parabon-nanolabs.com
  2. reverse-dns

THE PROBLEM. The mail server's source IP address which is trying to send mail to parabon.com does not have proper reverse DNS entries setup or the DNS ...


450 4.7.1 Client host rejected: cannot find your hostname， [IPアドレス ...

  1. https://help.arena.ne.jp
  2. articles
  3. 360025795274--Remot...
  1. https://help.arena.ne.jp
  2. articles
  3. 360025795274--Remot...

2019/7/2 -送信先のサーバーの仕様によっては「サーバーに設定されているホスト名」と「MXレコードのホスト名」が一致しない場合、エラーが返ることがございます ...


450 4.7.1 Client host rejected: cannot find your reverse hostname #2282

  1. https://github.com
  2. mailcow
  3. mailcow-dockerized
  4. issues
  1. https://github.com
  2. mailcow
  3. mailcow-dockerized
  4. issues

2019/2/8 -Hi, I'm not receiving some emails from some hostnames. I'm getting below error: postfix-mailcow_1 | Feb 8 20:30:05 mail ...


cannot find your reverse hostname - Spiceworks Community

  1. https://community.spiceworks.com
  2. Collaboration
  3. email
  1. https://community.spiceworks.com
  2. Collaboration
  3. email

2013/7/23 -If you get the error immediately and are running MDaemon as your mail server, check your inbound SMTP log which can be found on the MDaemon ...


450 4.7.1 Client host rejected: cannot find your reverse hostname

  1. https://community.cisco.com
  2. email-security
  3. td-p

2018/5/8 -The error suggests the destination server is unable to lookup a PTR record for the IP it is receiving the connection from. You may want to ...