I am seeing hundreds (on higher volume days, over a thousand) of lines like:
Jun 2 10:04:30 mx1 postfix/dnsblog[58868]: warning: dnsblog_query: lookup error for DNS query 23.124.167.115.b.barracudacentral.org: Host or domain name not found. Name service error for name=23.124.167.115.b.barracudacentral.org type=A: Host not found, try again Jun 2 10:04:33 mx1 postfix/smtpd[89019]: warning: 17.204.24.8.b.barracudacentral.org: RBL lookup error: Host or domain name not found. Name service error for name=17.204.24.8.b.barracudacentral.org type=A: Host not found, try again Jun 2 10:04:37 mx1 postfix/postscreen[55753]: warning: dnsblog reply timeout 10s for b.barracudacentral.org These lines are interspersed among others that indicate more "normal" activity with b.barracudacentral.org, e.g.: Jun 2 10:04:10 mx1 postfix/dnsblog[55985]: addr 199.30.50.35 listed by domain b.barracudacentral.org as 127.0.0.2 Jun 2 10:04:47 mx1 postfix/dnsblog[66369]: addr 157.56.112.23 listed by domain b.barracudacentral.org as 127.0.0.2 I know this is not an issue with Postfix (which dutifully reports the TRY_AGAIN it receives from the system library), but I wonder if anyone else is seeing this from barracuda? Based on a week's worth of logs, I do not see even a single instance of this problem with any other RBL (and we query several). I've separately engaged our DNS admins in case they could offer some insight, but it would be interesting to learn if others are experiencing the same issue /only/ with barracuda. -- Sahil Tandon
