Hi, Sounds like a strange problem.
Just to make sure it's set up correctly. Could you check that Postfix is talking to PowerDNS Recursor ? Because Postifx has a seperate resolv.conf (which gets updated when starting Postfix): /var/spool/postfix/etc/resolv.conf On Thu, Aug 18, 2016 at 02:20:25PM +0000, Michael wrote: > Hi all, > > I have been using pdns_recursor package on my Ubuntu 14.04 quite > some time to resolve host names locally. That worked fine for the > entire system. > > Last week I updated to Ubuntu 16.04. So I have a new Postfix version > (3.1.0) as well as a new pdns_recursor version (4.0.0-alpha2). > > Since this update Postfix does not receive correct answers for a > particular query anymore. Concretely, queries for A entries of > Office365 mail servers. > > For example if Postfix asks for the A entry of > nxp-com.mail.protection.outlook.com, pdns_recursor returns to > Postfix that there does not exists a A record. > However, if I manually do this query with dig, I do get an correct > answer. Please see the logs at the end of the mail. > > Besides the queries of Office365 mail servers, the rest is working > fine. I have no idea how to track down that issue? Is there any > setting in pdns_recursor I have to change? > > Thanks, > Michael > > > Postfix log > ===================================================================================== > Aug 15 18:21:07 mx0 postfix/qmgr[2715]: 39EF2A40EA2: > from=<m...@michi.su>, size=865, nrcpt=1 (queue active) > Aug 15 18:21:08 mx0 postfix/smtp[2907]: warning: no MX host for > nxp.com has a valid address record > Aug 15 18:21:08 mx0 postfix/smtp[2907]: 39EF2A40EA2: > to=<t...@nxp.com>, relay=none, delay=1492, delays=1492/0.12/0.81/0, > dsn=4.4.3, status=deferred (Host or domain name not found. Name > service error for name=nxp-com.mail.protection.outlook.com type=A: > Host not found, try again) > ===================================================================================== > > pdns_recursor log after Postfix query > ===================================================================================== > Aug 15 18:21:07 mx0 pdns_recursor[2512]: 1 [16/1] question for > 'nxp.com.|MX' from 127.0.0.1 > Aug 15 18:21:08 mx0 pdns_recursor[2512]: 1 [16/2] answer to question > 'nxp.com.|MX': 1 answers, 0 additional, took 2 packets, 147.186 ms, > 0 throttled, 0 timeouts, 0 tcp connections, rcode=0 > Aug 15 18:21:08 mx0 pdns_recursor[2512]: 2 [9/2] question for > 'nxp-com.mail.protection.outlook.com.|A' from 127.0.0.1 > Aug 15 18:21:08 mx0 pdns_recursor[2512]: 2 [9/2] answer to question > 'nxp-com.mail.protection.outlook.com.|A': 0 answers, 1 additional, > took 9 packets, 595.218 ms, 3 throttled, 0 timeouts, 0 tcp > connections, rcode=2 > ===================================================================================== > > pdns_log after dig query > ===================================================================================== > Aug 15 17:52:20 mx0 pdns_recursor[2520]: 2 [53/1] question for > 'nxp-com.mail.protection.outlook.com.|A' from 127.0.0.1 > Aug 15 17:52:21 mx0 pdns_recursor[2520]: 2 [53/1] answer to question > 'nxp-com.mail.protection.outlook.com.|A': 2 answers, 1 additional, > took 2 packets, 111.056 ms, 0 throttled, 0 timeouts, 0 tcp > connections, rcode=0 > ===================================================================================== > > _______________________________________________ > Pdns-users mailing list > Pdns-users@mailman.powerdns.com > https://mailman.powerdns.com/mailman/listinfo/pdns-users _______________________________________________ Pdns-users mailing list Pdns-users@mailman.powerdns.com https://mailman.powerdns.com/mailman/listinfo/pdns-users