In <427AE4FC(_dot_)2010900(_at_)ohmi(_dot_)org> Radu Hociung
<radu(_dot_)spf(_at_)ohmi(_dot_)org> writes:
wayne wrote:
The SA folks were adamant at the MARID interim meeting that requiring
serialized DNS lookups were a horrible idea.
[...]
Add to this that TTLs on RBL records are probably much longer than the
average SPF record TTL, and doing parallel queries to RBLs is a very
effective and efficient way to go.
I pretty sure that the TTLs on most RBLs are very short so that IP
addresses can be quickly added and removed.
By the time you allow each one of those domain names to take 111
queries, and use several %{l} and %{i} schemes, you'll be generating a
lot more uncacheable traffic than SpamAssassin would.
True, but the particular point that Frank was discussing is *just* the
lookup of the TXT and SPF RRs. You wouldn't do complete evaluations
of both in parallel.
-wayne