[Pdns-users] PowerDNS Recursor does not provide correct answer to Postfix

[Pieter Lexis]

Hi Michael,

On Thu, 18 Aug 2016 14:20:25 +0000
Michael <mine at michi.su> wrote:

> 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?

Postfix might be asking for DNSSEC, which is finiky in the alpha version Ubuntu pulled in. Can you install 4.0.1 from our repositories[1] and try again? 4.0.1 has about 5 months more development time in it.

Best regards,

Pieter

1 - https://repo.powerdns.com

-- 
Pieter Lexis
PowerDNS.COM BV -- https://www.powerdns.com