[Dshield] RBL deaths OT?

Kenneth Porter shiva at sewingwitch.com
Thu Sep 25 18:59:54 GMT 2003

--On Thursday, September 25, 2003 10:00 AM -0700 Darren Gasser
<kaos at earthlink.net> wrote:

> I think your estimates per lookup are very high.  DNS is a fairly compact
> protocol.  Also keep in mind that usage is not going to be uniform
> throughout the day.  Over 50% of our e-mail volume happens in a four hour
> window on weekdays.

And on a good server DNS results are cached on the same host. Over time the
cache will fill with frequent spammers and the negative answers for frequent
legitimate correspondents.

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