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Re: New poll on the IP4 mapped IP6 connection controversy
 

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william at elan

Nov 28, 2006, 11:28 AM


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Re: New poll on the IP4 mapped IP6 connection controversy [In reply to]

On Tue, 28 Nov 2006, wayne wrote:

> What should happen when you get an SPF check using example.com and
> 72.81.252.18:
>
> example.com TXT "v=spf1 ip6:::FFFF:72.81.252.18 -all"
>
>
> 1) The SPF result is well defined and the result is Fail. An ip6:
> mechanism that lists an IPv4-mapped IPv6 address is effectively a
> no-op and will never be matched.
>
> 2) The SPF result is well defined and the result is Pass. All SPF
> implementations must check both ip4: and ip6: mechanisms.
>
> 3) The SPF result is well defined and it depends on whether the
> connecting SMTP session is on an IPv6 socket or an IPv4 socket. If
> it is on an IPv4 socket, the result is Fail, if it is on an IPv6
> socket, the result is Pass.
>
> 4) The SPF result is undefined and implementations can choose to match
> or not match this.

3 if you want to be that precise and actually mention it, otherwise 4

--
William Leibzon
Elan Networks
william [at] elan

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Subject User Time
New poll on the IP4 mapped IP6 connection controversy wayne at schlitt Nov 28, 2006, 10:18 AM
    Re: New poll on the IP4 mapped IP6 connection controversy stuart at bmsi Nov 28, 2006, 11:22 AM
    Re: New poll on the IP4 mapped IP6 connection controversy william at elan Nov 28, 2006, 11:28 AM
        Re: New poll on the IP4 mapped IP6 connection controversy stuart at bmsi Nov 28, 2006, 11:38 AM
        Re: New poll on the IP4 mapped IP6 connection controversy wayne at schlitt Nov 28, 2006, 11:38 AM
            Re: New poll on the IP4 mapped IP6 connection controversy william at elan Nov 28, 2006, 11:49 AM
                Re: New poll on the IP4 mapped IP6 connection controversy stuart at bmsi Nov 28, 2006, 11:53 AM
                Re: New poll on the IP4 mapped IP6 connection controversy wayne at schlitt Nov 28, 2006, 12:09 PM
        Re: New poll on the IP4 mapped IP6 connection controversy william at elan Nov 28, 2006, 11:43 AM
    Re: New poll on the IP4 mapped IP6 connection controversy stuart at bmsi Nov 28, 2006, 11:34 AM
    Re: New poll on the IP4 mapped IP6 connection controversy wayne at schlitt Nov 28, 2006, 11:39 AM
    Re: New poll on the IP4 mapped IP6 connection controversy stuart at bmsi Nov 28, 2006, 11:50 AM
    Re: New poll on the IP4 mapped IP6 connection controversy william at elan Nov 28, 2006, 12:02 PM

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