dnsblog query fails, dig succeeds

[Len Conrad]

postconf mail_version
mail_version = 2.7-20091209

we run a copy of zen locally:

process dnblog -v logs:

dns_query: 226.224.46.92.zen.rbldnsd.domain.net (A): Host not found

but 

dig @zen.rbldnsd.domain.net 226.224.46.92.zen.rbldnsd.domain.net +short
127.0.0.11

in fact, we see only dns_query logging:

 (A): Host not found

never :

 (A): OK

Len