[168173] in North American Network Operators' Group
Re: gmail.com - 550 error for ipv6/PTR ?
daemon@ATHENA.MIT.EDU (Christopher Morrow)
Tue Jan 14 21:12:38 2014
In-Reply-To: <52D5E98B.1080607@elcsplace.com>
Date: Tue, 14 Jan 2014 21:10:21 -0500
From: Christopher Morrow <morrowc.lists@gmail.com>
To: nanog list <nanog@nanog.org>
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
On Tue, Jan 14, 2014 at 8:51 PM, Ted Cooper
<ml-nanog090304q@elcsplace.com> wrote:
> On 15/01/14 10:06, Brandon Applegate wrote:
>> Off-list replies are fine to minimize noise, and if there is an answer
>> or any meaningful correlation I will reply on-list. Thanks in advance
>> for any info/feedback.
>
brandon, I didn't get your original... but could you ping me off-list
and maybe I can get some data about what it is you're seeing? :)
> I have been running into these a lot also and have so far concluded that
> it is an error within Google. The PTR/AAAA, SPF and DKIM are all matched
> up and tested as working. It also occurring on domains using google apps
> to handle their email so it is platform wide. All of the emails are
> personal emails, but coming from multiple domains/senders.
>
> The exact same email will be rejected when sent to any google IPv6
> server for minutes/hours, but 3-4 hours later it will be accepted
> without error.
>
> The fact that it is being hard rejected is really quite annoying and
> generating a lot more support work.
>
> Unfortunately, my only fix at present is to turn off IPv6 delivery for
> all google hosted domains as I encounter them. It would be really nice
> if it was fixed.
>
> My theory is that they are failing PTR lookups.
>
>
>
