Re: [NTISP] Spam Filtering
David Payer ( (no email) )
Sat, 6 Mar 1999 17:00:20 -0600
>Sorry, just had to comment on your statement about reverse lookup. Since
>arin.net is the authority for IP numbers, they allocate them to the ISP who
>purchases them and the responsibility for reverse lookup falls to that ISP.
>Since most smaller ISPs have about two or three jumps to the owner of the
>subnet, they usually don't ever get the responsibilty for the reverse
>so the reverse lookup method of filtering mail is absurd if not insane.
Sorry, I will disagree with you. You ought to have your upstream make YOU
the authority for the network you are controlling. That is a simple setting
for them and then you can do this inverse addressing for yourself. We are a
small ISP and in the same situation but you have every right to be the
authority over your own network and your upstream can help you and most
often is willing to if you ask. Especially if you explain WHY.
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