SPF records are TXT record which are NOT subject to check-names processing.
If you created a seperate zone use nameservers that DO NOT live within the zone.
ns1._spf.switch.ch is NOT a legal hostname as it is not LDH.
> On 4 Jan 2021, at 20:01, Daniel Stirnimann <daniel.stirnim...@switch.ch>
> wrote:
>
> Hello all,
>
> I changed SPF for switch.ch to use SPF macros (RFC 7208). I wanted to
> use the "_spf" label but bind9 check-names complained with a "bad owner
> name (check-names)" message.
>
> I have now used "spf" instead of "_spf", e.g. exists:%{ir}.spf.switch.ch
>
> I didn't want to disable check-names for switch.ch because of this
> conflict. However, SPF record publishing is generally recommended to use
> the "_spf" subdomain which is not possible in this case.
>
> I guess, the only alternative would have been to make "_spf.switch.ch"
> its own zone and set check-names for this zone statement to "ignore". Or
> would this be a good reasons to loosen the check-names rules in bind9?
>
> Thanks,
> Daniel
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