- 550 error for ipv6/PTR ?

Blair Trosper blair.trosper at
Wed Jan 15 03:42:39 UTC 2014

Possibly related, a lot of 503 errors are starting to show up in the
javascript served by Google inside Gmail...reminds me of the issue in the
early morning hours (US time)...very similar to what I'm starting to see on
the front end.  I've not had any IPv6 emails bounce, but I do have some
that are MIA from Google Apps.  They were sent from one GApps domain to
another, but they haven't materialized on the other end...but they also
haven't bounced back to me.

As a matter of curiosity, I also sent my personal Gmail account email over
v6, and it's doing the same thing...either it's delayed or it's going to

The front-end of Gmail is starting to behave weirdly, as well, spitting out
bizarre errors like "technical code:  undefined", and saying it wasn't able
to send a message, but the message going through.  There's a fair amount of
chatter about this on Twitter, so I know it's not just me.

It also thinks it's offline in one tab, when an account in another is
perfectly fine.  Maybe a DC somewhere is having trouble again?

On Tue, Jan 14, 2014 at 8:10 PM, Christopher Morrow <morrowc.lists at
> wrote:

> On Tue, Jan 14, 2014 at 8:51 PM, Ted Cooper
> <ml-nanog090304q at> 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.
> >
> >
> >

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