wayne wrote:
But each new ptr: mechanism doesn't add more DNS lookups,
Depends on the SPF implementation, doesn't it ? Even if
it's smart it has to try to match bar after foo, and baz
after bar. An expensive mechanism, and almost deprecated.
And maybe we'll kill it in v=spf1.1 and a future SPF PS.
In general, having 100 ptr: mechanisms isn't going to
be worse than one.
Is your implementation always "smart" with multiple ptr-
mechanisms ? In your foo, bar, baz.com example, what if
other mechanisms stand between the ptr, and / or if the
qualifiers are different ?
In other words, the "count to ten" concept is KISS. Do
really like to add a special rule "count only the first
ptr, and do something with the p-macro if ..." [TBD] ?
Bye. Frank