Secure Email Certificate Support
CPPop (cPanel Mail Server) and other Stunnel based Mail Servers
When your issuance email arrives you will have three certificates in the email - your webserver certificate the GTE root certificate and a Comodo intermediate certificate. (you will only require your server certificate and the Comodo intermediate certificate)
1. Copy the Comodo intermediate certificate (Comodo Class 3 Security Services CA) into a text editor such as notepad and save as CA.pem.
2. Create a new file consisting of your private key and your certificate file (the webserver certificate contained within the email) as below:-----BEGIN RSA PRIVATE KEY-----
-----END RSA PRIVATE KEY-----
3. Then save the file as yourcert.pem in the /etc/ssl/certs/ directory.
4. Now copy the CA.pem file to the /etc/ssl/certs/ directory.
5. When you are setting up the SSL support you will need to access the stunnel configuration file which will probably be available at etc/stunnel/default/stunnel.conf .
6. Open the stunnel.conf and locate the following directives (they may be commented out by #). It may be necessary to add the above directives if they are not present.verify=3
7. Restart your web / mail service for the installation to be completed. In some instances, it may be necessary to physically restart the actual machine.