Hello,
I'm facing the same issue. When attempting to use Gmail to send emails on behalf of "mail.whatever.ext," Google only accepts a certificate with the common name of "mail.whatever.ext" rather than "*.whatever.ext."
To address this, I created a symlink in the following directory:
/www/server/panel/plugin/mail_sys/cert/whatever.ext
I used the following commands to create the symlinks:
ln -s -b /www/server/panel/vhost/letsencrypt/mail.ever.ext/fullchain.pem fullchain.pem
ln -s -b /www/server/panel/vhost/letsencrypt/mail.whatever.extprivkey.pem privkey.pem
However, even after doing this, under the Mail Server settings, the SSL status for the domain "whatever.ext" remains empty, prompting to add SSL. I'm unsure of what else needs to be done to resolve this issue.
