[outages] Google Mail rejecting IPv6 originated mails

[Gert Doering]

Hi,

On Thu, May 23, 2019 at 07:31:28AM -0400, Jared Mauch via Outages wrote:
> Anyone else having this problem?  Their system is periodically rejecting mails and reporting it as invalid IPv6 PTR but there have been no changes in my systems, and the help pages at google do not actually provide any additional guidance.

Google is fully intent on making people use IPv4 for SMTP delivery
to their MXes.

Lots of silly requirements that are not there on IPv4 (like, must have
strong PTRs, SPF, DKIM, ...) - so, BCP today is "just deliver to Google
over IPv4".

gert
-- 
"If was one thing all people took for granted, was conviction that if you 
 feed honest figures into a computer, honest figures come out. Never doubted 
 it myself till I met a computer with a sense of humor."
                             Robert A. Heinlein, The Moon is a Harsh Mistress

Gert Doering - Munich, Germany                             gert at greenie.muc.de
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