>I don't know what SIMS does to use a given blacklist server. Is that
>what it does? To look up and see if an IP address is blacklisted,
>does it take, for example, 151.196.152.53 and do a query for
>
>53.152.196.151.spamhaus.relays.osirusoft.com?
>
>I thought that the blacklisting worked by doing a lookup for
>151.196.152.53 using the name server spamhaus.relays.osirusoft.com.
>A result returned in the range of 127.xx.xx.xx indicates a
>blacklisting.
The actual DNS query is of the form
reversed_ip.the_dns_server_fqdn
If you want to test it manually using nslookup for example, this is
how you have to construct it. SIMS does this internally - in the SIMS
rbl server list you only enter the fqdn of the server.
<http://www.stalker.com/SIMS/AntiSpam.html#BlackDNS>
Stefan Jeglinski
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