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質問

• スタードメイン無料サーバー

  Gmail宛てのみ送信エラーとなります
• 本文：

  スタードメイン無料サーバーで5つアドレスを設定して利用しておりますが
  Gmail宛てに送信したメールだけが以下のメッセージで送信エラーとなってしまいます。
  Gmailからのメールの受信はできます。
  なお、この現象はOutlookやWIｎメールなどのメールソフト利用時だけではなくスターメールのWebメールでも同様です。
  
  お詳しい方おりましたら原因と対処方法についてご教示いただけると助かります。
  
  当方あまり詳しい知識がないため手順など詳しく教えた頂けるとありがたいです。
  何卒宜しくお願い致します。
  
  エラーメッセージ
  This is the mail system at host sv52.star.ne.jp.
  
  I'm sorry to have to inform you that your message could not
  be delivered to one or more recipients. It's attached below.
  
  For further assistance, please send mail to postmaster.
  
  If you do so, please include this problem report. You can
  delete your own text from the attached returned message.
  
  The mail system
  
  <●●@gmail.com>: host gmail-smtp-in.l.google.com[64.233.188.27] said:
  550-5.7.26 This mail is unauthenticated, which poses a security risk to the
  550-5.7.26 sender and Gmail users, and has been blocked. The sender must
  550-5.7.26 authenticate with at least one of SPF or DKIM. For this message,
  550-5.7.26 DKIM checks did not pass and SPF check for [aozoratokumo.com]
  did 550-5.7.26 not pass with ip: [157.112.187.73]. The sender should visit
  550-5.7.26 https://support.google.com/mail/answer/81126#authentication for
  550 5.7.26 instructions on setting up authentication.
  w184-20020a6362c1000000b00564514df65bsi6882684pgb.890 - gsmtp (in reply to
  end of DATA command)
  Reporting-MTA: dns; sv52.star.ne.jp
  X-Postfix-Queue-ID: 94DA230369D03D
  X-Postfix-Sender: rfc822; inperson-c@aozoratokumo.com
  Arrival-Date: Mon, 28 Aug 2023 10:43:31 +0900 (JST)
  
  Final-Recipient: rfc822; shu2oji@gmail.com
  Original-Recipient: rfc822;shu2oji@gmail.com
  Action: failed
  Status: 5.7.26
  Remote-MTA: dns; gmail-smtp-in.l.google.com
  Diagnostic-Code: smtp; 550-5.7.26 This mail is unauthenticated, which poses a
  security risk to the 550-5.7.26 sender and Gmail users, and has been
  blocked. The sender must 550-5.7.26 authenticate with at least one of SPF
  or DKIM. For this message, 550-5.7.26 DKIM checks did not pass and SPF
  check for [aozoratokumo.com] did 550-5.7.26 not pass with ip:
  [157.112.187.73]. The sender should visit 550-5.7.26
  https://support.google.com/mail/answer/81126#authentication for 550 5.7.26
  instructions on setting up authentication.
  w184-20020a6362c1000000b00564514df65bsi6882684pgb.890 - gsmtp

• 緊急度：急ぎ投稿者：shu2ojiさん投稿時間：2023/08/28 15:34