Dino Edwards:
>
> << I suggest that you start with dig/nslookup and establish that you have
> properly working DNS, and that your ISP is not replacing all "not found"
> responses with the IP address of some "helpful" website.
>
> Using local DNS servers and not ISP servers. DNS is working as it should
> using local DNS.
Let's do some concreate tests.
1) What is the output from:
dig +short 2.0.0.127.zen.spamhaus.org
2) What is the output from:
dig +short 1.0.0.127.zen.spamhaus.org
3) How do you know that postscreen is actually being used? Hint: look
for postscreen in Postfix logs.
4) How do you know that postscreen does DNS lookups? Hint: look for
dnsblog processes. By default these process terminate after being
idle for 100s.
Wietse
