Reputation - Realtime DNS based White/Black Lists (RWL/RBL)

j-chkmail can make use of two kind of data distributed on DNS servers :

• Black/White list of IP addresses and hostnames - these lists may be used to dynamically define classes of SMTP clients based on the presence of these hosts inside DNS RBWL lists and use this both to impose or relax limits or to integrate this data into message score.

• Black list of domains found in URLs present in the body of messages - this is an alternative way to use the blacklist of URLs (instead of using Berkeley DB databases). Much easier to configure and maintain, but slower.

<DNS-IP-RBWL> 
dnswl.ensmp.fr    netclass=dnswl; odds=0.5000; code=all; onmatch=continue; checks=addr,name
dnsbl.ensmp.fr    netclass=dnsbl; odds=2.0000; code=127.0.0.3,127.0.0.2; onmatch=continue; checks=addr,name
</DNS-IP-RBWL>

• netclass -
• odds -
• code -
• onmatch -
• checks -

<DNS-URLBL> 
multi.surbl.org      odds=1.0000; score=20.000, code=all; onmatch=continue 
</DNS-URLBL> 

• odds -
• score -
• code -
• onmatch -