At 15:14 14-07-2008, Matthias Leisi wrote:
>Unfortunately, it does not seem to be *that* useful:

I've seen some ASNs sending spam only but I don't use that as a rule
as it will catch some good mail over time. As you mentioned, the
volume also depends on the size of the ASN. BTW, you won't see all
the prefixes because of the way routing works.