From https://www.checktls.com/
From browser
in thunderbird delivers certificate error, solution¿?
I tried manually with root access and it gave me access denied
-bash: /etc/letsencrypt/live/mail.“domain.com”/cert.pem: Permission denied
- Manually tried to install SSL specifically to mail.domain.com via terminal. Successfully done using command:
/root/.acme.sh/acme.sh --issue -d mail.domain.com --cert-file
/etc/letsencrypt/live/mail.domain.com/cert.pem --key-file /etc/letsencrypt/live/mail.domain.com/privkey.pem --fullchain-file /etc/letsencrypt/live/mail.domain.com/fullchain.pem -w /home/domain.com/mail.domain.com -k ec-256 --force --server letsencrypt
> SOLUTION
https://cyberpanel.net/KnowledgeBase/home/onboarding-and-initial-cyberpanel-configurations/