SMTP over IPv6 : gmail classifying nearly all IPv6 mail as spam since 20140818

[Marco d'Itri]

On Nov 02, Darren Pilgrim <darren at bluerosetech.com> wrote:

> The problem is Google ignores the fact you must not hard fail on DNS. Even
> if the response is NXDOMAIN, the most you can do is soft bounce because you
> can not know why you didn't get an RR.  Gmail hard bounces on such errors
No, not really. If the response is NXDOMAIN then there is no rDNS.

> I get relay failure to gmail at least once every day.  It is always the same
> thing: gmail's server didn't get a response to the PTR lookup and 5xx'd the
> mail.  I've even seen mail to the same server succeed mere seconds later.
> Google has an internal reliability problem and a policy that pushes the cost
> out to those with no power to fix it.
I think that you have a problem, not Google.

-- 
ciao,
Marco