From MAILER-DAEMON Sun Sep 27 06:48:15 2015                        Return-path: <>                                                    Envelope-to: archpi@alarmpi                                        Delivery-date: Sun, 27 Sep 2015 06:48:15 +0200                     Received: from exim by alarmpi with local (Exim 4.86)                      id 1Zg3sl-0001mg-Ny                                                for archpi@alarmpi; Sun, 27 Sep 2015 06:48:15 +0200        X-Failed-Recipients: setervang@gmail.com                           Auto-Submitted: auto-replied                                       From: Mail Delivery System <Mailer-Daemon@alarmpi>                 To: archpi@alarmpi                                                 Content-Type: multipart/report; report-type=delivery-status; boundary=1443329295-eximdsn-1804289383                                   MIME-Version: 1.0                                                  Subject: Mail delivery failed: returning message to sender         Message-Id: <E1Zg3sl-0001mg-Ny@alarmpi>                            Date: Sun, 27 Sep 2015 06:48:15 +0200                              --1443329295-eximdsn-1804289383                                    Content-type: text/plain; charset=us-ascii                         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:
  setervang@gmail.com
    host gmail-smtp-in.l.google.com [2a00:1450:4010:c06::1a]
    SMTP error from remote mail server after end of data:
    550-5.7.1 [2a02:fe0:cc20:9c20:ba27:ebff:feba:1a5e] Our system has detected that                                                       550-5.7.1 this message does not meet IPv6 sending guidelines regarding PTR
    550-5.7.1 records and authentication. Please review
    550-5.7.1  https://support.google.com/mail/?p=ipv6_authentication_error for more
    550 5.7.1 information. xy7si5177416lbb.53 - gsmtp
--1443329295-eximdsn-1804289383                                    Content-type: message/delivery-status

Reporting-MTA: dns; alarmpi
Action: failed
Final-Recipient: rfc822;setervang@gmail.com
Status: 5.0.0
Remote-MTA: dns; gmail-smtp-in.l.google.com
Diagnostic-Code: smtp; 550-5.7.1 [2a02:fe0:cc20:9c20:ba27:ebff:feba:1a5e] Our system has detected that
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