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E-Mail / Problems sending emails to Gmail IPv6 error? HELP!

« on: November 19, 2018, 02:02:04 AM »

This is the mail system at host s1.hostmy.link.

I'm sorry to have to inform you that your message could not
be delivered to one or more recipients. It's attached below.

For further assistance, please send mail to postmaster.

If you do so, please include this problem report. You can
delete your own text from the attached returned message.

                   The mail system

<MyEmail@gmail.com>: host
    gmail-smtp-in.l.google.com[2607:f8b0:400e:c05::1b] said: 550-5.7.1
    [2602:ffc5:20::2:17a9] Our system has detected that this message does
    550-5.7.1 not meet IPv6 sending guidelines regarding PTR records and
    550-5.7.1 authentication. Please review 550-5.7.1
    https://support.google.com/mail/?p=IPv6AuthError for more information 550
    5.7.1 . y17si10189044pgh.353 - gsmtp (in reply to end of DATA command)
Reporting-MTA: dns; s1.hostmy.link
X-Postfix-Queue-ID: 25694880C84
X-Postfix-Sender: rfc822; jonathanh@hostmy.link
Arrival-Date: Sun, 18 Nov 2018 20:56:24 -0500 (EST)

Final-Recipient: rfc822; MyEmail@gmail.com
Original-Recipient: rfc822;MyEmail@gmail.com
Action: failed
Status: 5.7.1
Remote-MTA: dns; gmail-smtp-in.l.google.com
Diagnostic-Code: smtp; 550-5.7.1 [2602:ffc5:20::2:17a9] Our system has detected
    that this message does 550-5.7.1 not meet IPv6 sending guidelines regarding
    PTR records and 550-5.7.1 authentication. Please review 550-5.7.1
    https://support.google.com/mail/?p=IPv6AuthError for more information 550
    5.7.1 . y17si10189044pgh.353 - gsmtp