Hi there,
Hoping someone can help with this basic question.
Firstly, I can see someone else raising the same question here:
https://www.virtualmin.com/node/39343
This relates to this bug which apparently was fixed with Virtualmin version 5.01 (I’m using 5.06)
https://www.virtualmin.com/node/39341
So, I managed to correctly install Let’s Encrypt on my CentOS 6.8 server and issued certificates for my domain.com and www.domain.com.
These work correctly on the website.
When I generated the certificate I can see that it was also copied to Dovecot:
Copying certificate and key to Dovecot files …
… wrote out certificate in /etc/pki/dovecot/certs/dovecot.pem, key in /etc/pki/dovecot/private/dovecot.pem and CA cert in /dovecot.ca.pem
However when I tried to use the certificate, Thunderbird throws an error message because the certificate is only valid for domain.com and www.domain.com but not mail.domain.com
When I try to include mail.domain.com when generating a certificate I get:
… request failed : Domain has no website, and DNS-based validation is not possible
I would appreciate some help in resolving this.
Thanks