[Mimedefang] SURBL effectiveness and domain turnaround time

[Ian Mitchell]

13 servers which are 486/50dx2's and 13 thousand node zeon clusters makes
a bit of a difference. It's not the number but the size that counts. ;)

> sc.surbl.org has 13 name servers, just like the root name servers of
> the Internet.  You can imagine that if 13 name servers can handle all
> the root name server traffic, it's not so bad to have a low TTL. :-)
>
> Regards,
>
> David.
>
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