I noticed a problem just now that I really hadn't though about before.  I 
recently added a number of DNSBLs to my sa-mimedefang.cf that weren't in 
the stock SA (2.6.0-cvs).

proxy.relays.osirusoft.com
socks.relays.osirusoft.com
all of blackholes.us's country zones, not providers
7 SORBS BLs
proxies.relays.monkeys.com
proxies.blackholes.easynet.nl
dynablock.blackholes.easynet.nl
multihop.dsbl.org
dialups.visi.com

I noticed a reply that was apparently sent to a reply someone sent me on
the Procmail list.  I couldn't seem to find that reply for some reason.  
I checked my >= spambox and found it.  That message received a score of
5.787.  It received .6 for being in the ORSS, 1 for being in the NJABL,
and 1 for being in dialups.visi (1 is the score I used for all the BLs I
added).  His IP was listed in those lists as a dialin IP.  He effectively
received a score of 2.6 just for being a dialin user and not SmartHosting
to his provider's MTA.  He also received 3.3 for a Forged Outlook MUA rule
which I haven't sorted out yet (stock rule and score).

This got me wondering.  Is it a bad idea to call more than 1 DNSBL of a 
given type?  For example, would it be wise querying 4 direct-to-MX BLs, 4 
proxy lists, 5 open relay lists, etc?  I'm wondering if there's a better 
way to handle this.  For example, group all direct-to-mx lists together.  
Query the first.  If it matches, skip the rest.  If it doesn't match, 
query the next.  So on and so forth for the rest of the lists until the 
end.  Is that a more logical way to handle it?

Justin



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