[Pdns-users] qmail and powerdns 2.9.19

John Nelson jln at comspeco.net
Thu Nov 10 19:01:41 UTC 2005

Sorry to top post my own email, but I'm pretty sure this is a qmail 
problem and has nothing to do with powerdns, after doing some more work 
on this.  Sorry about that.

John Nelson wrote:

> I'm using qmail and powerdns 2.9.19 on another server, all running 
> centos 4.2.  Before upgrading (running 2.9.17 pdns then), I did not 
> get as many deferral: CNAME_lookup_failed_temporarily._ errors as I do 
> now in qmail.
> Are there any reasons why these CNAME lookups are failing?  To 
> temporarily fix the problem, I've installed bind running localhost 
> with our qmail boxes, and that seems to have resolved it.
> I'm thinking that since qmail does not like dns UDP packets larger 
> than 512 bytes, maybe thats the problem?  Does powerdns follow the rfc 
> here?
> Thanks for any help here.  I'd really like to be able to turn off bind 
> running localhost and go back to using our powerdns servers for the 
> qmail boxes.


John Nelson
Network Engineer


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