On Mon, 2022-12-19 at 12:38 +0100, Benny Pedersen wrote:
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@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 ?
That was just an example of a failing request. They all fail.
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
That's doable, but I don't think the problem is really *my* spf record.
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
Even on a caching dns server? Any ideas on why it is failing?