On Sun, Jan 14, 2007 at 01:21:10PM -0600, Seth Goodman wrote:
The only default that (IMHO) makes sense is "a" for HELO verification.
It does make the record a bit more intuitive.
"v=spf1 a:outbound.example.com -all"
"v=spf3 outbound.example.com -all"
Erm, no, what I mean with "implicit 'a'" is the following:
"v=spf1 a ?all"
A host with an IP address that resolves to "mailhost.example.com" is
implicitly allowed to say "HELO mailhost.example.com". A host with
a different IP address is NOT forbidden to use the name by default
(in other words: ?all, not -all).
Alex
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