On Thu, Mar 05, 2015 at 09:37:26AM +0100, Michael wrote: > permit_dnswl_client list.dnswl.org, > > Mar 5 09:18:14 mx0 postfix/smtpd[25201]: warning: > 144.252.10.85.list.dnswl.org: RBL lookup error: Host or domain name not > found. Name service error for name=144.252.10.85.list.dnswl.org type=A: > Host not found, try again > > Did I miss something in my config?
Looks like you have a DNS resolver issue, or perhaps your access to this list is blocked by policy. Test with "dig": $ dig +noall +comment +ans -t a 144.252.10.85.list.dnswl.org ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 17429 ;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 1 ;; OPT PSEUDOSECTION: ; EDNS: version: 0, flags:; udp: 4096 ;; ANSWER SECTION: 144.252.10.85.list.dnswl.org. 28692 IN A 127.0.15.0 Nothing in your Postfix configuration is likely to break DNS in this way, the problem is outside Postfix. Note that the dnswl.org nameservers have IPv6 addresses, if your caching resolver is trying to use IPv6 to reach them, but your IPv6 connectivity is broken that could be part of the problem. There are other potential issues. Start by looking in your /etc/resolv.conf file (make sure smtpd(8) is not chrooted, or that the resolv.conf file in the jail is correct). Then understand why the resolver is having trouble. -- Viktor.