On 5/28/2011 12:50 PM, David Brown wrote:
Hello Postfixers, attempting to get my postfix server in good shape I
read the Book of Postfix to help me resolve some key issues.
Now, I implemented the use of the dnsbl per p. 98 in the Postfix book.
On the postfix rbl list I included the now standard list of rbls
including spamcop and spamhaus. This part of the rbl works as expected.
I then included my own dnsbl defined in my BIND9 server and included in
the postfix config.
The curious issue about using my own dnsbl is not all reversed IPs
resolve to 127.0.0.3 as expected since the target IP is definitely in
the range of IPs defined in the local dnsbl.
This means running the host command with the reversed ip address with
the dnsbl hostname tacked onto the end may or may not resolve to
127.0.0.3. Some IPs resolve correctly and some do not but both target IP
addresses have a range defined in the custom dnsbl.
Example:
host 1.133.92.204.dnsbl.mydnsbl.tld
1.133.92.204.dnsbl.mydnsbl.tld has address 127.0.0.3
host 1.73.75.217.dnsbl.mydnsbl.tld
Host 1.73.75.217.dnsbl.mydnsbl.tld not found: 3(NXDOMAIN)
Yet both IP addresses referenced above reside within the same list.
Has anyone seen this before? And, howto debug this situation?
Please advise.
This looks like a problem in your BIND9 dnsbl; nothing to do
with postfix.
If you need more help, try a BIND9 support forum.
