当サイトはユーザー体験を改善するためのメンテナンスを実施中に機能が制限される予定です。記事を読んでもあなたの問題が解決せず質問をしたい場合は、Twitter の @FirefoxSupport、Reddit の /r/firefox で、サポートコミュニティが皆さんを助けようと待機しています。

Mozilla サポートの検索

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

詳しく学ぶ

このスレッドはアーカイブに保管されました。 必要であれば新たに質問してください。

Around 30% of the emails I send get returned. If I resend, it always works.

  • 1 件の返信
  • 0 人がこの問題に困っています
  • 18 回表示
  • 最後の返信者: Matt

more options

Around 30% of the emails I send get returned. If I resend, it always works. I am using Thunderbird 102.10.1 (64-bit) on OpenSuse Leap 15.4 The returned message is eg.

     This is an automatically generated Delivery Status Notification.      

Delivery to the following recipients failed permanently:

  * rachel.a.drysdale@gmail.com

Reason: A message that you sent to the following recipient could not be delivered due to a permanent error. ** The remote server ?? responded with: ** rachel.a.drysdale@gmail.com ??:?? This message was created automatically by mail delivery software on the server .


Reporting-MTA: dns; avasout-ptp-003 [84.93.230.244] Received-From-MTA: dns; [192.168.0.30] [212.159.97.201] Arrival-Date: Fri, 05 May 2023 11:11:17 +0100


Final-recipient: rfc822; rachel.a.drysdale@gmail.com Diagnostic-Code: smtp; 550-5.7.26 This mail is unauthenticated, which poses a security risk to the

Last-attempt-Date: Fri, 05 May 2023 11:11:17 +0100

I compared the source for the failed message and that for the successfully re-sent message. The significant difference seems to be that order of items in the header changed: FAILED: Subject To Ref Content-Language From

SUCCEEDED: From Subject To Ref Content-Language


Does anyone have an idea about this?

Around 30% of the emails I send get returned. If I resend, it always works. I am using Thunderbird 102.10.1 (64-bit) on OpenSuse Leap 15.4 The returned message is eg. ****************** This is an automatically generated Delivery Status Notification. Delivery to the following recipients failed permanently: * rachel.a.drysdale@gmail.com Reason: A message that you sent to the following recipient could not be delivered due to a permanent error. ** The remote server ?? responded with: ** rachel.a.drysdale@gmail.com ??:?? This message was created automatically by mail delivery software on the server . Reporting-MTA: dns; avasout-ptp-003 [84.93.230.244] Received-From-MTA: dns; [192.168.0.30] [212.159.97.201] Arrival-Date: Fri, 05 May 2023 11:11:17 +0100 Final-recipient: rfc822; rachel.a.drysdale@gmail.com Diagnostic-Code: smtp; 550-5.7.26 This mail is unauthenticated, which poses a security risk to the Last-attempt-Date: Fri, 05 May 2023 11:11:17 +0100 ****************** I compared the source for the failed message and that for the successfully re-sent message. The significant difference seems to be that order of items in the header changed: FAILED: Subject To Ref Content-Language From SUCCEEDED: From Subject To Ref Content-Language Does anyone have an idea about this?

すべての返信 (1)

more options

Final-recipient: rfc822; rachel.a.drysdale@gmail.com

Diagnostic-Code: smtp; 550-5.7.26 This mail is unauthenticated, which poses a security risk to the

Risk to the What exactly. I think you missed a bit there. However google indicates that the 550-5.7.26 may well indicate server issues with plus net. Have you contacted them?