dnsbl: return errors as Error objects
dnsbl: return errors as Error objects

craigslist/Haraka,abhas/Haraka,AbhilashSrivastava/haraka_sniffer,Synchro/Haraka,jaredj/Haraka,bsmr-x-script/Haraka,baudehlo/Haraka,bsmr-x-script/Haraka,typingArtist/Haraka,fatalbanana/Haraka,Dexus/Haraka,zombified/Haraka,haraka/Haraka,abhas/Haraka,niteoweb/Haraka,jjz/Haraka,Dexus/Haraka,zombified/Haraka,Synchro/Haraka,Synchro/Haraka,zombified/Haraka,hiteshjoshi/my-haraka-config,smfreegard/Haraka,DarkSorrow/Haraka,bsmr-x-script/Haraka,haraka/Haraka,DarkSorrow/Haraka,Dexus/Haraka,hatsebutz/Haraka,abhas/Haraka,typingArtist/Haraka,danucalovj/Haraka,haraka/Haraka,fatalbanana/Haraka,Synchro/Haraka,slattery/Haraka,danucalovj/Haraka,typingArtist/Haraka,MignonCornet/Haraka,AbhilashSrivastava/haraka_sniffer,hiteshjoshi/my-haraka-config,slattery/Haraka,jjz/Haraka,baudehlo/Haraka,danucalovj/Haraka,hatsebutz/Haraka,DarkSorrow/Haraka,smfreegard/Haraka,hatsebutz/Haraka,fatalbanana/Haraka,jaredj/Haraka,AbhilashSrivastava/haraka_sniffer,baudehlo/Haraka,smfreegard/Haraka,jaredj/Haraka,baudehlo/Haraka,slattery/Haraka,slattery/Haraka,jjz/Haraka,craigslist/Haraka,hiteshjoshi/my-haraka-config,craigslist/Haraka,msimerson/Haraka,msimerson/Haraka,bsmr-x-script/Haraka,Dexus/Haraka,AbhilashSrivastava/haraka_sniffer,msimerson/Haraka,craigslist/Haraka,typingArtist/Haraka,zombified/Haraka,MignonCornet/Haraka,fatalbanana/Haraka,MignonCornet/Haraka,niteoweb/Haraka,DarkSorrow/Haraka,danucalovj/Haraka,jjz/Haraka,smfreegard/Haraka,haraka/Haraka,jaredj/Haraka,msimerson/Haraka,niteoweb/Haraka,hatsebutz/Haraka,MignonCornet/Haraka