A bit off-topic: problems with sending to a Gmail user

[Matthias Apitz]

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.yy at 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-Daemon at ms-10.1blu.de> -----

Date: Thu, 10 Mar 2022 18:48:05 +0100
From: Mail Delivery System <Mailer-Daemon at ms-10.1blu.de>
To: guru at 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.yyy at 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.yyy at 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: <guru at 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 <guru at unixarea.de>)
	id 1nSMtR-00015i-BW
	for xxx.yyy at gmail.com; Thu, 10 Mar 2022 18:48:05 +0100
Date: Thu, 10 Mar 2022 17:48:04 +0000
From: Matthias Apitz <guru at unixarea.de>
Reply-To: Matthias Apitz <guru at unixarea.de>
To: xxx yyy <xxx.yyy at gmail.com>
Subject: Fwd: Re: Jugendfischen 2022
Content-Type: text/plain; charset=utf-8
Content-Transfer-Encoding: quoted-printable
Message-ID: <oflqxi.r8jis5.1hgf02e-qmf at ms-10.1blu.de>
MIME-Version: 1.0
X-Con-Id: 51246
X-Con-U: 0-guru



----- End forwarded message -----

-- 
Matthias Apitz, ✉ guru at unixarea.de, http://www.unixarea.de/ +49-176-38902045
Public GnuPG key: http://www.unixarea.de/key.pub