I'm trying to add zen.spamhaus.org to my DNSBL list, but it's not being accepted - neither are the other BLs from Spamhaus. I see a previous mention on the forums that says it is part of the default list, but it's not showing as one of the current defaults. Is there any way that I can add it to my DNSBL list?
Also, Spamhaus (and others) run DNS based whitelists as well. Will you support DNSWLs in the future?