Gmail (thus Nanog) rejecting ipv6 email

Sun Apr 3 18:40:18 UTC 2022

On Apr 3, 2022, at 9:41 AM, John Levine <johnl at iecc.com> wrote:
> 
> It appears that Bjørn Mork <bjorn at mork.no> said:
>> Google has been trying to move away from Internet email for many years
>> now.  Just let them.  There is no way you can "fix" that problem on your
>> side.
> 
> Don't be silly.  Gmail has over a billion users and hosts mail for
> vast numbers of businesses large and small.
> 
> I agree that they are stricter than many others at mail authentication
> but considering how big they are, they do a very good job of doing what
> the standards say.  Way better than Y**o* ot M*****o**.
> 

Accepting mail for delivery, and then either silently dropping it, delaying it for days, or putting mail that in no way resembles spam into a spam folder seems a little worse than “doing what the standards say”. If you’re going to decide, on little or no evidence, that a message is spam or otherwise does not deserve to get delivered, the least you could do is to bounce it so that the sender is aware. No need to generate a bounce mail that could turn into backscatter; just reject the mail during the SMTP exchange.

Jim Shankland