On Fri, Mar 11, 2022 at 11:43:53AM +0100, Matthias Apitz wrote:
> 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.

I've been seeing a lot of that lately.  Google seem to have tightened
their email security practice recently.

It appears that 1blu is doing something that GMail doesn't like.  They
probably have a number of users who have the same problem.  I would
ask them to check their MTA configuration against the section "Make
sure your messages are authenticated" in the referenced page
(https://support.google.com/mail/answer/81126#authentication).

> ----- 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
> 

-- 
Mark H. Wood
Lead Technology Analyst

University Library
Indiana University - Purdue University Indianapolis
755 W. Michigan Street
Indianapolis, IN 46202
317-274-0749
www.ulib.iupui.edu

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