I’m currently in the process of implementing a LetsEncrypt setup, and so far everything is going smooth. We currently support HTTPs for around 200 custom domains. Everything is validating perfectly using the http-01 challenge due to a CNAME record on our customers domains.
However, of all the domains there’s one single domain that I simply cannot validate: brochure.kia.com.
It keeps returning with a “SERVFAIL looking up A for brochure.kia.com” error and I cannot understand why.
LetsDebug.net can consistently give me the error, but If I look up the A record for this domain using any other tool out there, even the unboundtest.com, I simply do not get any errors, and everything seems to resolve as normal.
Any help is greatly appreciated - at this point I don’t know what to tell the customer what the problem with their domain is.
Thank you in advance