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Re: Google threatens to break Gmail

2015-10-24 22:34:49
On Oct 24, 2015, at 11:02 PM, Randy Bush <randy(_at_)psg(_dot_)com> wrote:
The requirement in v6 that didn't exist in v4 is that you have to have a
PTR record for your MTA's IPv6 address before Google wants to let you
send SMTP over IPv6.

and spf

randy

If you don’t have spf your mail is going to get scored way down my my mailer 
too.   SPF is an IETF standard, so you really can’t complain that Google are 
scary renegades for using it.