@nixCraft
For all the PowerDNS users out there:
```
$ for zone in $(pdnsutil list-all-zones | grep -v -e ip6.arpa -e in-addr.arpa | sort); do
pdnsutil list-zone $zone | egrep -q "\sMX\s" || echo $zone is missing MX record
pdnsutil list-zone $zone | egrep -q -i "v=spf1" || echo $zone is missing SPF record
pdnsutil list-zone $zone | egrep -q -i "v=DMARC" || echo $zone is missing its DMARC policy
pdnsutil list-zone $zone | egrep -q -i "v=DKIM" || echo $zone does not hold a single DKIM record
done
```