I propose that we add a mask modifier that looks like this:
-m=64/6 m=80.66/16 m=192/3
Cool idea, but why do we need any more syntax? How is that different from:
-ip4:64/6 -ip4:80.66/16 -ip4:192/3
?
The SPF compiler would just put those shortcuts in the first record.
I think you misunderstood. The legit outgoing servers _are_ on those nets,
so you don't want to fail them with -. An way to exclude IP ranges is needed.
What is the advantage of excluding ranges to reduce the number of lookups,
when we can eliminate *all* lookups by compiling the SPF record? I would
just say: keep your SPF records very simple, well under the limit of 10
lookups, or use the compiler.
-- Dave
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