At 7:25 PM -0600 8/30/2003, LuKreme (List User Kreme) wrote:On Aug 30, 2003, at 12:31 PM, Global Homes Webmaster wrote:On 08/30/03 at 01:35 -0400, chris opined:I'll have to try the cn-kr next and see how much more it stops.
By itself, probably quite a bit. But there's a significant overlap with CBL
and other lists with other purposes (easynet, OPM, etc. -- the reason so
much spam gets relayed through Chinese hosts is that so many of them are
open proxies and/or open relays, and the Chinese don't seem to care about
closing them). If you're already using one or more of those lists, you
might not see as big a drop as you might expect.
exactly, as I said, 90% of the blocked pam gets hit by cbl, and 9.5% gets hit by cn-kr.
If I reversed the entries, cn-k would catch about 40%, but that would increase the overall number of DNS requests I'm using, so I list cbl first.
I've been wondering about this for some time... Does the order really affect the number of lookups?
Yes.
So, the question arises: what is the optimum order for the most popular RBL entries? I'm sure there are people on this list who have put a lot of thought, and perhaps some research and testing, into it.
You want your biggest hammer to have first crack. For me, currently, this is cbl. For others it might be something else.
Which RBLs should be listed early? Which are less productive, but still worthwhile, and can be listed later?
The other thing I would recommend is staying away from having 6+ RBLs. Each lookup costs real time, and even with 4 RBLs this means a ~15 second delay on ever GOOD email. This might not seem like a lot, but it's 15 additional seconds that SIMS has to hold/deal with every email. At 8 servers you're looking at maybe a 30 second hold. On a busy server especially that just can't be good.
--
...when you're no longer searching for beauty or love, just some kind of life with the edges taken off. When you can't even define what it is that you're frightened of; this song will be here.
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