Challenge failed only for domain mail.opobir.com

Hi. I am trying to install ssl cert for mail.opobir.com, but I have error message (look picture) only for mail.opobir.com, for domain.com was installed successfully. Also mail.domain.com passed all dns checked tests.

My domain is: opobir.com

When I first time run the command "sudo certbot --apache", I am not configure correctly A record for "mail.opobir.com", and I have error message (look picture for error message). After correctly configuration records for "mail.opobir.com" I have still same error message.

My web server is ubuntu 20.04 (LAMP),
provider is Contabo and I can login to a root shell,
also I have installed webmin panel on server.
certbot version: 0.40.0

Hi @demir6693

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