>...
>Subject: Excessive DNS Requests
>From: lister lynch <[EMAIL PROTECTED]>
>To: users@spamassassin.apache.org
>
>Our ISP, Covad, is periodically claiming that we have excessive DNS
>requests and is threatening to turn off our service. It's primarily due
>to SA, I think. Looked around for answers, and already set a bunch of
>the BL checks to 0.0 to turn off the rules. Any idea how to further
>prevent the excessive DNS requests?
>
>Setup:
>SA running on FC1 as firewall, passing mail thru to an Exchange server
>on the inside.
>
>Thanks a bunch for any insight,
1) run your own caching name server.
2) If you do mone than 10K messages a day, make your server "stub"
the roots of the bl domains.
3) If you do 50K+ or 100K+, consider rsync and local secondary
service for those lists who allow it.
Of the above, "1" will get you the most, the fastest; "2" never
seems to be discussed anywhere, but if you are a bind/named user, it will
take off 5-10% of your load; If "3" is appropriate, you *really* need some
long term planning also.
You could always "buy" DNS service, lots of companies sell it. But
please do not abuse a public server (there still are quite a few - mainly
academic, but a few corporate).
Paul Shupak
[EMAIL PROTECTED]
P.S. Just curious, but do you have any idea how many lookups you are doing
and/or how many Covad thinks is excessive? (I *was* a Covad customer a few
bankruptcies ago, but they could keep the line up reliably for my site.)
