Domain Validation for SES

Hello, I have tried several times to validate a domain to use SES. I have 2 previous domains validated without problem, both on the same DNS server. This third domain, which has the DNS server in the same place as the previous two, is configured the same, they have put the ones I mentioned, I am trying to validate a domain to use the SES service, I have already tried several times and it does not validate it. I put the DKIM CNAME records in the DNS and a single _dmarc record. What does not appear is the _amazonses record, which I do have in the other domains. The DNS server is my own that I can modify the records without problem, and I cannot find the error and where to generate the _amazonses TXT record, I estimate that due to this lack it does not validate it. Could someone help me, Thanks