Gmail MX over IPv6
cloos at jhcloos.com
Mon Jun 18 02:11:23 CEST 2012
>>>>> "WSR" == Wolfgang S Rupprecht <wolfgang.rupprecht at gmail.com> writes:
WSR> I got a hardfail from gmail. Their SPF parsing for IPv6 is messed
WSR> up. Maybe the "::" notation scewed up a string compare to
WSR> ":0:0:0:" or ":0:0:0:0:"?
I can confirm that. I have a ip6: netblock in my spf and my outgoing
box's ipv6 is typically ascii-fied with a ::. When I configure my
MTA to prefer ipv6 for outgoing, goog shows an spf fail. When the MTA
uses ipv4 goog is happy.
I can see three possibilities:
Their spf parses doesn't grok ip6: tagged entries at all.
It doesn't handle addr/prefix notation for ipv6.
It cannot compare explicit vs :: notation.
James Cloos <cloos at jhcloos.com> OpenPGP: 1024D/ED7DAEA6
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