why IPv6 isn't ready for prime time, SMTP edition
bruns at 2mbit.com
Wed Mar 26 02:25:57 UTC 2014
On 3/25/14, 7:58 PM, TJ wrote:
> In an attempt to get this thread back on topic:
> * Does Google require rDNS for IPv4 mail sources?
After a quick test here, Google did not reject the mail from an IPv4
address that did not have rDNS.
> If so, doing so for IPv6 shouldn't be a surprise. Your current provider's
> inability to support rDNS for IPv6 is not a protocol failure, it is a
> provider failure.
> If not, is there an additional operational reason for them to do so in
> IPv6? ... and in that case, I'd come to the same end result,
> ... ?
Google willing to accept collateral damage for IPv6 mailing hosts, but
too severe of collateral damage for IPv4 ones that would affect too many
Like I said in a previous response, if you are going to make rdns a
requirement, why not make SPF and DKIM mandatory as well?
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