[H-SASIG] [Sysadmin] Gmail and IPv6

[Russell Stuart]

On Tue, 2016-03-08 at 02:28 +0000, Brad Marshall wrote:
> Apparently gmail has changed some of their spam protection settings,
> and now is refusing email to it that is coming from IPv6 that does
> not have a valid PTR record:
> 
> <brad.marshall at gmail.com> (expanded from <brad at humbug.org.au>): host
> gmail-smtp-in.l.google.com[2607:f8b0:4002:c06::1a] said: 
> 550-5.7.1 [2602:ffea:1:14c::1] Our system has detected that this
> message does 550-5.7.1 not meet IPv6 sending guidelines regarding PTR
> records and 550-5.7.1 
> authentication. Please review 550-5.7.1 https://support.google.com/ma
> il/p=ipv6_authentication_error for more 550 5..1 inoformation.
> e63si8276630ybe.136 - gsmtp (in reply to end of DATA command)
> 
> Are we able to get a PTR setup for our IPv6 record at all.

I have no idea, without wading through the Crissic doco.

> > Or do we want to wait until we get somewhere new to host the
> server?

Sounds sane.  In the mean time I've disabled sending over IPv6.