Postfix and PDNS

Michael Ströder michael at stroeder.com
Mon Jul 11 23:04:36 CEST 2016


Wolfgang Rosenauer wrote:
> I just switched to PowerDNS Recursor on my Postfix mailserver since
> their latest version (4) now supports DNSSEC validation.
> 
> Unfortunately now Postfix seems to be unable to verify DANE anymore. I
> always get only "Anonymous TLS connections" where I got "Verified" ones
> when using bind.
> 
> Apparently and somewhat confirmed by tcpdump and the PowerDNS guys it
> seems that Postfix relies on the +AD flag to signal a DNSSEC validated
> response but doesn't request it. I can only find a set DO bit in the
> query's dump.

Sorry for maybe asking the obvious:
Did you turn on DNSSEC validation in your recursor.conf?

dnssec=validate

Ciao, Michael.


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