>> I grep'ed the mail logs for dnsblog and got a huge number of these: >> >> [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: [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 (8.8.8.8 and 8.8.4.4). I added my host's DNS resolver first in the list and the errors seem to have stopped. Is that a good config? 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 do? Is there a way to verify that everything is working properly? - Grant
