Re: Qmail vs PowerDNS

On 25 April 2017 at 07:16, <[email protected]> wrote:

> Hi all.  I've been running qmail with great success for many years.
> I'm running gentoo with netqmail-1.06-r2; my network uses PowerDNS as
> its local DNS server.
>
> I recently upgraded to pdns 4.  That's broken my qmail; now all
> attempts to send result in the dreaded
>
> CNAME_lookup_failed_temporarily._(#4.4.3)
>
> I've debugged a bit.  Netqmail-1.06-r2 includes the big-dns patch, and
> I verified that it was applied correctly.  I've run wireshark to
> capture the network transactions, and nothing looks amiss.  I'm
> getting valid responses, which are well under the 512-byte UDP limit
> (though that shouldn't matter).  The problem is clearly pdns, as when
> I change my resolver to some other server, qmail is perfectly happy.
>
> What else should I look for?  What conditions other than oversize
> packets would cause qmail to consistently faile the CNAME lookup?
>
> Thanks in advance...
>

I have done the following to fix the error. in qmail-remote.c,

change

addrmangle(reciplist.sa + reciplist.len,*recips,&flagalias,!relayhost);

to

addrmangle(reciplist.sa + reciplist.len,*recips,&flagalias,0);


Look at

https://lists.dns-oarc.net/pipermail/dns-operations/2013-January/009518.html