Issuing correct Let's Encrypt certificate for POP3 SSL logons

Hi there,

Hoping someone can help with this basic question.

Firstly, I can see someone else raising the same question here:

This relates to this bug which apparently was fixed with Virtualmin version 5.01 (I’m using 5.06)

So, I managed to correctly install Let’s Encrypt on my CentOS 6.8 server and issued certificates for my and
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 /

However when I tried to use the certificate, Thunderbird throws an error message because the certificate is only valid for and but not

When I try to include 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.



could anyone look at this?


Did you ever find a solution to this problem?

same problem with admin.DOMAIN.TLD , etc.
Is there a turnaround for checking Let’s Encrypt with DNS-base validation or you work on it?

Operating system Ubuntu Linux 16.04.1
Webmin version 1.831
Virtualmin version 5.06