gmail blocking 6to4 ipv6 addresses

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gmail blocking 6to4 ipv6 addresses

Shawn Landden
Does gmail universally block 6to4 addresses, or is there something else I am doing wrong?

Jun 07 23:32:14 www.git.icu postfix/smtp[19358]: 0695A2409C: to=<[hidden email]>, orig_to=<[hidden email]>, relay=gmail-smtp-in.l.google.com[2607:f8b0:400d:c08::1b]:25, delay=1.6, delays=0.12/0.07/0.84/0.56, dsn=5.7.1, status=bounced (host gmail-smtp-in.l.google.com[2607:f8b0:400d:c08::1b] said: 550-5.7.1 [2002:c62e:c6c6::1] Our system has detected that this message does not 550-5.7.1 meet IPv6 sending guidelines regarding PTR records and authentication 550-5.7.1 . Please review 550-5.7.1  https://support.google.com/mail/?p=IPv6AuthError for more information 550 5.7.1 . w38-v6si3369064qtc.330 - gsmtp (in reply to end of DATA command))

-Shawn Landden

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Re: gmail blocking 6to4 ipv6 addresses

Viktor Dukhovni

> On Jun 8, 2018, at 11:39 PM, Shawn Landden <[hidden email]> wrote:
>
> Does gmail universally block 6to4 addresses, or is there something else I am doing wrong?
>
> Jun 07 23:32:14 www.git.icu postfix/smtp[19358]: 0695A2409C: to=<[hidden email]>, orig_to=<[hidden email]>, relay=gmail-smtp-in.l.google.com[2607:f8b0:400d:c08::1b]:25, delay=1.6, delays=0.12/0.07/0.84/0.56, dsn=5.7.1, status=bounced (host gmail-smtp-in.l.google.com[2607:f8b0:400d:c08::1b] said: 550-5.7.1 [2002:c62e:c6c6::1] Our system has detected that this message does not 550-5.7.1 meet IPv6 sending guidelines regarding PTR records and authentication 550-5.7.1 . Please review 550-5.7.1  https://support.google.com/mail/?p=IPv6AuthError for more information 550 5.7.1 . w38-v6si3369064qtc.330 - gsmtp (in reply to end of DATA command))

The fine message says (and dig confirms) that your 6to4
address [2002:c62e:c6c6::1] lacks PTR records.  You might
fix that first:

; <<>> DiG 9.11.2-P1 <<>> -x 2002:c62e:c6c6::1
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 22961
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 8192
;; QUESTION SECTION:
;1.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.6.c.6.c.e.2.6.c.2.0.0.2.ip6.arpa. IN PTR

--
        Viktor.

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Re: gmail blocking 6to4 ipv6 addresses

postfix-5
To create and operate PTR Records for a 6to4 network,
https://6to4.nro.net/ may be helpful.

suomi

On 06/09/2018 06:27 AM, Viktor Dukhovni wrote:

>
>> On Jun 8, 2018, at 11:39 PM, Shawn Landden <[hidden email]> wrote:
>>
>> Does gmail universally block 6to4 addresses, or is there something else I am doing wrong?
>>
>> Jun 07 23:32:14 www.git.icu postfix/smtp[19358]: 0695A2409C: to=<[hidden email]>, orig_to=<[hidden email]>, relay=gmail-smtp-in.l.google.com[2607:f8b0:400d:c08::1b]:25, delay=1.6, delays=0.12/0.07/0.84/0.56, dsn=5.7.1, status=bounced (host gmail-smtp-in.l.google.com[2607:f8b0:400d:c08::1b] said: 550-5.7.1 [2002:c62e:c6c6::1] Our system has detected that this message does not 550-5.7.1 meet IPv6 sending guidelines regarding PTR records and authentication 550-5.7.1 . Please review 550-5.7.1  https://support.google.com/mail/?p=IPv6AuthError for more information 550 5.7.1 . w38-v6si3369064qtc.330 - gsmtp (in reply to end of DATA command))
>
> The fine message says (and dig confirms) that your 6to4
> address [2002:c62e:c6c6::1] lacks PTR records.  You might
> fix that first:
>
> ; <<>> DiG 9.11.2-P1 <<>> -x 2002:c62e:c6c6::1
> ;; global options: +cmd
> ;; Got answer:
> ;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 22961
> ;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 1
>
> ;; OPT PSEUDOSECTION:
> ; EDNS: version: 0, flags:; udp: 8192
> ;; QUESTION SECTION:
> ;1.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.6.c.6.c.e.2.6.c.2.0.0.2.ip6.arpa. IN PTR
>
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Re: gmail blocking 6to4 ipv6 addresses

Benny Pedersen-2
In reply to this post by Shawn Landden
Shawn Landden skrev den 2018-06-09 05:39:
> Does gmail universally block 6to4 addresses, or is there something
> else I am doing wrong?

http://multirbl.valli.org/lookup/2002%3Ac62e%3Ac6c6%3A%3A1.html

FCrDNS Test
rDNS for IP 2002:c62e:c6c6::1 No record found! Failed

on the other side google make errors aswell

http://multirbl.valli.org/lookup/2607%3Af8b0%3A400d%3Ac08%3A%3A1b.html

shameless

add PTR to your domain that matches forward ipv6, this will make google
happy