Hello, I'm having a problem installing letsencrypt SSL certificate on mail server, when I click ssl, then click my domain name then Apply, then I get acme-challenge.mydomain.com I enter that value in dns manager for my domain, then when I press verify, I get this error:
No valid TXT resolution record was found in the domain name ['acme-challenge.mydomain.com'], please check whether the TXT record is parsed correctly. If it is applied by DNSAPI, please try again in 10 minutes!
Error code:No TXT record found at _acme-challenge.mydomain.com
Verify results: Verify failed
How to solve this problem? Thanks in advance.