My hosting provider, HostUpon upgraded my account to a new server. They also installed a Let’s Encrypt Certificate. I HAD Let’s encrypt Certs on my sub-domain, corp.networkingtechnology.org, but we had a problem with port 443 and it still isn’t solved. So I closed down all the sites. Including my working mail server Postfix/Dovecot.
Since the upgrade all my sites on corp.networkingtechnology.org have https, but the mail server has stopped working.
In mail.cf, there’s a path to the Let’s Encrypt local certificate that I installed. How can I get this to use the certificate on the host of networkingtechchnology server in Canada?
hermes.corp.networkingtechnology.org is working apart from the SSL certificate.
Can anyone help?