Author Topic: Problems sending emails to Gmail IPv6 error? HELP!  (Read 7923 times)

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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

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Re: Problems sending emails to Gmail IPv6 error? HELP!
« Reply #1 on: November 19, 2018, 05:55:38 AM »
In your /etc/hotst file - disable the IPv6 lines.

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Re: Problems sending emails to Gmail IPv6 error? HELP!
« Reply #2 on: November 28, 2018, 06:31:48 PM »
or add an ipv6 PTR

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Re: Problems sending emails to Gmail IPv6 error? HELP!
« Reply #3 on: November 28, 2018, 07:05:54 PM »
or add an ipv6 PTR
Can you advise how?
I've tried but couldn't manage unfortunately.

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Re: Problems sending emails to Gmail IPv6 error? HELP!
« Reply #4 on: November 28, 2018, 07:07:46 PM »
it would depend on your dns host but it needs to be done there who are you hosting with ?

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Re: Problems sending emails to Gmail IPv6 error? HELP!
« Reply #5 on: November 29, 2018, 05:28:59 AM »
Hetzner.

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Re: Problems sending emails to Gmail IPv6 error? HELP!
« Reply #6 on: November 29, 2018, 07:25:56 AM »
Ok they have a dns panel but you may have to mail their support to add the ptr record for you

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Re: Problems sending emails to Gmail IPv6 error? HELP!
« Reply #7 on: January 24, 2020, 06:57:00 AM »
Hi im facing this exact issue.

Im hosting on Linode, no idea on how to add an ipv6 PTR

If i disable the IPv6 lines, it will work?

What is best, and how can i do this.

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Re: Problems sending emails to Gmail IPv6 error? HELP!
« Reply #8 on: January 24, 2020, 09:40:22 AM »
Try to ask Linode support about them IPv6
Also, you can disable IPv6 in Postfix configuration. Add/change in /etc/postfix/main.cf
Code: [Select]
inet_protocols = ipv4
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Re: Problems sending emails to Gmail IPv6 error? HELP!
« Reply #9 on: January 24, 2020, 11:22:57 AM »
Hi im facing this exact issue.

Im hosting on Linode, no idea on how to add an ipv6 PTR

If i disable the IPv6 lines, it will work?

What is best, and how can i do this.


I have disabled all ipv6 with my linode dns settings.  IPV6 is still a very big problem for everyone.

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Re: Problems sending emails to Gmail IPv6 error? HELP!
« Reply #10 on: January 24, 2020, 12:38:47 PM »
IPv6 is not a problem, the problem is not configuring things properly.

We bet on IPv6 in all our clients' accounts, it has some problems, but the solution is not to forget about it, it is to try to solve the problems.

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Re: Problems sending emails to Gmail IPv6 error? HELP!
« Reply #11 on: January 24, 2020, 03:34:09 PM »
Thanks for your answer, i have reached Linode Support and they point out this guide.

https://www.linode.com/docs/networking/dns/configure-your-linode-for-reverse-dns/

My question is im using same IP for multiple domains, so i guess i need to create an entrace for each domain??.

I will try to set ipv6 correctly before disabling.

Thanks very very much,