SPF DNS Error / R_SPF_DNSFAIL

[Benny Pedersen]

Carlos Mogas da Silva skrev den 2022-12-19 11:57:
> Hi list.
> 
> My incoming messages are getting R_SPF_DNSFAIL and an error on the
> Authentication-Results header:
> 
> spf=temperror
>  (mail01.r3pek.org: error in processing during lookup of
>  no-reply at cttexpresso.pt: DNS error)

for cttexpresso.pt netblocks are authorized 492,110 individual IPv4 
addresses so many ips why not just +all in there spf ?

for r3pek.org change spf to "v=spf1 ip4:195.201.255.103 
ip6:2a01:4f8:c2c:4d63::3 -all" this will disable needs for dns resolve 
of ips, it might help while keeping it valid spf

> I see the DNS request on my DNS server and a "working" reply going
> out. What can cause this error
> and/or how can I debug it?

try avoid to many dns querys