Increased Volumes Of Spam

[Denis Beauchemin]

Randal, Phil a écrit :
> Scott Silva wrote:
>   
>> cbl.abuseat.org is part of zen.spamhaus.org, via the included
>> lookup against the xbl list, so using both just increases your
>> dns lookups without any extra benefit.
>> Greetpause does help a lot, as I probably drop 10 to 20% of
>> the spam with it alone. Five seconds is a good starting point,
>> but probably not over 30 seconds.
>>     
>
> The only problem with zen.spamhaus.org is this statement, found on
> http://www.spamhaus.org/zen/index.lasso :
>
> "ZEN Usage
>
> Use of the Spamhaus DNSBLs via DNS queries to our public DNSBL mirrors
> is free for low-traffic mail servers serving less than 100 users. Use of
> the Spamhaus DNSBLs by commercial users, including corporate networks,
> ISPs and ESPs, requires a subscription to Spamhaus's Data Feed service."
>
>   

Since I've seen this statement I tried to cut down on their RBL.  After 
some reshuffling I get the following usage (today's stats so far):
    cbl.abuseat.org :  31957 (34.29%)
      list.dsbl.org :   1040 ( 1.12%)
safe.dnsbl.sorbs.net :  57967 (62.20%)
   zen.spamhaus.org :   2238 ( 2.40%)

On Jan 1 I used only spamhaus and sorbs (in that order) and I had the 
following stats:
    safe.dnsbl.sorbs.net :  63222 (29.63%)
        zen.spamhaus.org : 150167 (70.37%)

I check the RBLs in this order in my sendmail.mc:
FEATURE(`dnsbl',`safe.dnsbl.sorbs.net',`"554 Rejected " $&{client_addr} 
" found in safe.dnsbl.sorbs.net"')dnl
FEATURE(`dnsbl',`cbl.abuseat.org',`"554 Rejected " $&{client_addr} " 
found in cbl.abuseat.org"')dnl
FEATURE(`dnsbl',`list.dsbl.org',`"554 Rejected " $&{client_addr} " found 
in list.dsbl.org"')dnl
FEATURE(`dnsbl',`zen.spamhaus.org',`"554 Rejected " $&{client_addr} " 
found in zen.spamhaus.org"')dnl

Denis

-- 
   _
  °v°   Denis Beauchemin, analyste
 /(_)\  Université de Sherbrooke, S.T.I.
  ^ ^   T: 819.821.8000x62252 F: 819.821.8045


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