Zimbra Email Server SSL certificate is recommended to secure our email transactions.
Before installing the Zimbra Email Server SSL Certificate using the Admin Console, you must first generate the CSR, as detailed in the following Wiki:
For a Commercial SSL, generate a valid CSR (Certificate Signing Request).
Select the target server to generate the SSL files like the CSR and the private key:
In the next step, select the option to generate the CSR for the commercial certificate authorizer
In this window, you need to select the next settings:
After fill the details in above-mentioned form you can download now the CSR file, ready to send to your SSL Certificate Provider, if you miss this step, you can find the csr file in the next path /opt/zimbra/ssl/zimbra/commercial/commercial.csr:
You should receive the next files from Comodo:
Go to Home > Configure > Certificates and click in the settings icon, then click on Install Certificate
Select the target server where install the SSL Certificate:
Select the option install the commercial signed certificate
If all the info in the review windows is ok, press next button
Add the files one by one that Comodo sent to you, the Certificate, the root, and the CA:
Select Install button and the SSL Certificate will be installed
Restart the Zimbra services like zimbra user in a CLI session:
You can return to the Admin Console and View the installed Certificate.
At Velan, our server support engineers can help to install Zimbra Mail Server and configure SSL in your server. If you are interested in our service, please fill the Quick connect form to get in touch with us.`