I do not do something right, I download the certificate from /etc/pki/tls/certs/NSRV.crt, I import it in Internet Explorer I connect to the webmail and I get the error "There is a problem with the security certificate of this site Web "Click here to close this webpage. Or Go to this website (not recommended).
If I import it in Firefox when connecting to the webmail it says "You do not trust the certificate because it is self-signed."
I have to change something in the certificate ???