Rob Arends wrote:
<snip some stuff>
> Then in xmail's server.tab - CustMapsList, list your RBL first. (obviously
> you'd need your resolv.conf to point to your named otherwise you'd need to
> delegate and make public your RBL.)  I have a local named running as a cache
> anyway, so hosting a zone is an easy step after that.

Maybe I'm wrong about this, but I was under the impression that 
CustMapsList was checked against the IP address, not against the RDNS? 
Or am I wrong here? I mean, assuming the connecting IP address is 
1.2.3.4, which resolves to badhost.example.com, and your local BL is 
rbl.tld.cc, then CustMapsList is going to attempt to look up:

4.3.2.1.rbl.tld.cc

not:

badhost.example.com.rbl.tld.cc

Or am I completely wrong?

Also, (assuming I'm wrong) there's the whole issue of wanting to block 
*.example.com (any host or subdomain in example.com). I don't know how 
you would set something like that up in BIND without having to list each 
host or subdomain...

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