Securing your ISPConfig 3 managed mailserver with a valid Let’s Encrypt SSL certificate

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If you’re running your own mailserver, it’s best practice to connect to it securely with a SSL/TLS connection. You’ll need a valid certificate for these secure connections. In this tutorial, we’ll set up a Let’s Encrypt certificate for our mailserver that renews automatically.

Source: Howtoforge Linux Howtos und Tutorials – Read More

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