On 2014-03-26 10:46, Viktor Dukhovni wrote:
On Wed, Mar 26, 2014 at 08:57:54AM -0500, deoren wrote:
On March 21st I noticed these entries in my mail log and I'm not able
to
pinpoint the source of the trouble:
warning: x.x.x.x.b.barracudacentral.org: RBL lookup error: Host or
domain
name not found. Name service error for
name=x.x.x.x.b.barracudacentral.org
type=A: Host not found, try again
Your nameserver logs from that time may shed more light on the reason,
but RBLs are sometimes unavailable due to DDoS, and routing problems
can
happen due to bad BGP data, ... that was then and this is now. The
fact that it works now just means that the transient problem is gone.
Sorry, I did a poor job of communicating that the error started then and
is ongoing. I checked a moment ago and see a fresh entry.
Is there anything obvious I can check?
log entries from your recursive resolver on whichever machine it
resides on (ideally local to the MTA host).
In my ignorance I haven't configured recursive resolvers on my mail
servers, but am instead using hosting provider nameservers (which I
registered with barracudacentral.org). I'll research what it takes to
run a local recursive nameserver.
