Author: Phil Pennock Date: To: exim-users Subject: Re: [exim] wanna turn off ipv6 when sending to gmail
On 2015-08-27 at 09:09 +0100, Mike Cardwell wrote: > I haven't seen issues either, but then I also use DKIM and SPF. The big
> one for GMail is making sure you have FCRDNS set up. That is an absolute
> requirement of delivering mail to a Google mailserver over IPv6.
I considered that but decided to cut the text mentioning it, because
it's been such a strong requirement for reliable delivery for so long.
All Gmail has (apparently) done is implement the checks at a big
provider, as a hard requirement instead of a strong scoring requirement.
I strongly suspect that Randy has matching forward/reverse DNS, based
simply on who he is and the DNS RFCs which he's written.
