When I open Outlook, it pops up the “The server you are connected to is using a security certificate that cannot be verified.” warning. When I click ‘View Certificate’, the one shown is issued by example.com. This is obviously some type of default, but I am not sure why I am seeing that.
I Went to Virtualmin->Server Configuration->Manage SSL Certificate. I created a Signing Request, then visited StartSSL and obtained a certificate. I then chose the tab Update Certificate and Key and entered the appropriate information. I then chose the tab CA Certificate and entered the appropriate information. I then restarted the SSH Server, the Apache Server (after modifying the conf file), and the postfix server (after modifying the conf file). [Side note: When I uncommented the lines in master.cf, all incoming email were rejected - the error message in maillog was Client host rejected: Access denied]
The Current Certificate tab shows ‘This SSL certificate is already being used by : Postfix, Usermin, Webmin, Dovecot’, but I still get the warning.
I did notice that the files /etc/postfix/postfix.cert.pem and /etc/postfix/postfix.key.pem are not the same as the files which were just created. since /etc/postfix/main.cf ‘points’ to these files, my guess is that this is the root cause of the problem. The files in /home/virtserver are: ca.pem, cub.class1.server.ca.pem, ssl.ca, ssl.cert, ssl.csr, and ssl.key.
I also cannot find the ‘Install to Postfix’ button to which many posts refer.
I am obviously missing a step - any suggestions?