Add TLS certificates and private keys

For the Email Gateway to be able to use Transport Layer Security (TLS), you need to import the following PEM-format files:

The signing certificate of the certificate authority (CA) that issued the signed certificate.
The signed certificate to use when acting both as a TLS client and as a TLS server.
The private key to use when acting both as a TLS client and as a TLS server.

To import the PEM-format files for certificates and private keys:

Put the certificate and private key files in a folder that you can access from the Email Gateway web interface.
Click System > Encryption > TLS Configuration.
Select the Certificates tab.
In the Signing Certificate area, click Click here to change these settings.
Click Browse, and then navigate to the signing certificate file.
Click Save.
In the Server Certificate and Private Key area, click Click here to change these settings.
Click Browse, and then navigate to the signed certificate and private key files.
Click Save.
Repeat steps 7-9 for the Client Certificate and Private Key.
Apply the new configuration.