Hello,
I know, it's not the fault of our beloved mutt, but maybe someone is or was in the same problem and knows a solution... We (my family) are member of a fisherman association and I have to send mails to one of the head members in charge for youth training. He has a Google mail account as <xxx...@gmail.com> and any mail gets rejected by Google with the response below. Any idea what I could do? Thanks in advance matthias ----- Forwarded message from Mail Delivery System <mailer-dae...@ms-10.1blu.de> ----- Date: Thu, 10 Mar 2022 18:48:05 +0100 From: Mail Delivery System <mailer-dae...@ms-10.1blu.de> To: g...@unixarea.de Subject: Mail delivery failed: returning message to sender This message was created automatically by mail delivery software. A message that you sent could not be delivered to one or more of its recipients. This is a permanent error. The following address(es) failed: xxx....@gmail.com host gmail-smtp-in.l.google.com [74.125.133.26] SMTP error from remote mail server after pipelined end of data: 550-5.7.26 This message does not have authentication information or fails to 550-5.7.26 pass authentication checks. To best protect our users from spam, the 550-5.7.26 message has been blocked. Please visit 550-5.7.26 https://support.google.com/mail/answer/81126#authentication for more 550 5.7.26 information. x6-20020a7bc206000000b003826d797674si3455029wmi.29 - gsmtp Reporting-MTA: dns; ms-10.1blu.de Action: failed Final-Recipient: rfc822;xxx....@gmail.com Status: 5.0.0 Remote-MTA: dns; gmail-smtp-in.l.google.com Diagnostic-Code: smtp; 550-5.7.26 This message does not have authentication information or fails to 550-5.7.26 pass authentication checks. To best protect our users from spam, the 550-5.7.26 message has been blocked. Please visit 550-5.7.26 https://support.google.com/mail/answer/81126#authentication for more 550 5.7.26 information. x6-20020a7bc206000000b003826d797674si3455029wmi.29 - gsmtp Return-path: <g...@unixarea.de> Received: from [188.174.56.186] (helo=fritz.box) by ms-10.1blu.de with esmtpsa (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from <g...@unixarea.de>) id 1nSMtR-00015i-BW for xxx....@gmail.com; Thu, 10 Mar 2022 18:48:05 +0100 Date: Thu, 10 Mar 2022 17:48:04 +0000 From: Matthias Apitz <g...@unixarea.de> Reply-To: Matthias Apitz <g...@unixarea.de> To: xxx yyy <xxx....@gmail.com> Subject: Fwd: Re: Jugendfischen 2022 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Message-ID: <oflqxi.r8jis5.1hgf02e-...@ms-10.1blu.de> MIME-Version: 1.0 X-Con-Id: 51246 X-Con-U: 0-guru ----- End forwarded message ----- -- Matthias Apitz, ✉ g...@unixarea.de, http://www.unixarea.de/ +49-176-38902045 Public GnuPG key: http://www.unixarea.de/key.pub