295109Re: email from comcast.net is bouncing
- Aug 30, 2013On 8/30/2013 2:27 PM, Grant wrote:
>>> I grep'ed the mail logs for dnsblog and got a huge number of these:Postfix always add missing master.cf entries automatically as part
>>> [postfix/postscreen] warning: psc_dnsbl_request: connect to
>>> private/dnsblog service: No such file or directory
>> Looks as if you've found the problem.
>> Make sure your master.cf has an entry like:
>> dnsblog unix - - n - 0 dnsblog
> Thank you. I added it and restarted postfix and started to get errors
> like these:
of the upgrade procedure. You can break this by restoring an old
file after the upgrade.
>Yes, good. Many public DNS servers are denied access by RBL
> [postfix/dnsblog] warning: dnsblog_query: lookup error for DNS query
> MASKED.list.dnswl.org: Host or domain name not found. Name service
> error for name=MASKED.list.dnswl.org type=A: Host not found, try again
> I did some searching and I think this was due to my use of Google's
> DNS resolvers (22.214.171.124 and 126.96.36.199). I added my host's DNS resolver
> first in the list and the errors seem to have stopped. Is that a good
providers due to excessive query load.
Using your own DNS is the proper solution.
>A local caching nameserver is highly recommended. If you already
> I also read a recommendation to set up a caching nameserver like
> unbound on the same machine as postfix. Is that the right thing to
have one that's working OK, there's no pressing need to replace it.
>Watch the logs for errors or unexpected behavior.
> Is there a way to verify that everything is working properly?
-- Noel Jones
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