On Thu, 30 Sep 2004, Roger Moser wrote:
I suggest following syntax for the case if the SPF record is the same for
multiple SPF versions:
TXT "v=spf1 v=spf2 v=spf3 ip4:1.2.3.4 -all"
Actually this is quite good idea and if we want to integrate what is
currently in marid-protocol, it could be something like:
"v=spf1 v=SPF2.0/MFROM ip4:1.2.3.4 -all"
SPF version 1 ignores the additional "v=" entries as unknown modifiers.
Lets also make sure then in SPF2 syntax that "v" stays reserved modifier
that is SUPPOSED to be ignored.
It does also mean that in future spf protocol the way to recognize SPF
records would have to change, istead of looking for "v=spf1" or "v=spf2"
it would have to look for beginning of "v=spf" and then look for if the
string contains "v=spf2" (for version2) and start processing from there.
--
William Leibzon
Elan Networks
william(_at_)elan(_dot_)net