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SSL Installation under Exim 4.x

Below is a description of how to set up the SSL certificate. This assumes that the certificate and the private key already exist on the server:

Please insert the data into the corresponding directories from:

Private key:

/ etc / ssl.key /


/ etc / ssl.crt /

If you have met the above-mentioned basic requirements, you can begin:

  • Login to your server
  • Now open the configuration file / etc/exim4/conf.d/main/01_exim4-config_listmacrosdefs with an editor of your choice.
  • Now, add the following line to the configuration .
  • Enable TLS


  • Specify the path to the certificate .

    / etc / ssl.crt /

  • Enter the path to the private key to

    / etc / ssl.key /

  • Save and exit from the editor.

  • Now activate the changed Exim4 configuration.

    update- exim4.conf

  • Now start the Exim4 service.

    / etc/init.d/exim4 restart

    The certificate is now installed and has TLS enabled.

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