DNSBL exception

hi,

i've had a look through the message achieve, granted only the subjects and have not been able to find what i was looking for.

i did read in one of the messages that someone had see it was possible to skip the DNSBL lookup and i was woundering if this was true and how would i do it.

the aim is to say skip the DNSBL lookup on say certain ip's isp's etc, but to scan the matching ips / isp's etc with the proxy scan only.

the hope is to try and avoid false positives that the DNSBL can produce, but still have some protection against the DNSBL by-passed scans,

does anyone know if this is possible please?

thanks

claire.