Alex wrote:
Hi,

- I'm happy to add any extensions as long as these are also free and
open source -- note that our 'target audience' includes big ISPs and
unfortunately for them things as Spamhaus's RBL aren't free;

Do the commercial vendors get to use publically-available DNSBLs like
zen?

It's not the commercial vendors who are using these DNSBLs it's
the customers of their products who are the users.

If so, and since they use them for commercial purposes, do they
license its use in cases such as for this bake-off?


The licensing isn't their problem.  A commercial vendor can put
in a hook to it's product to use Zen but that doesn't make that
vendor liable if a user of it's product uses Zen against some
sort of restriction by Zen against commercial use.

Ted

How does zen compare with the commercial DNSBLs that the commercial
vendors have themselves and we don't have access to?

Thanks,
Alex

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