How to Enable SSL for Roundcube

1. Log in to the control panel.

2. Go to Mail and click the pencil icon next to the domain name you want to add SSL to (hover over the domain name to find the pencil icon).

3. Find the option Enable SSL for this domain and check the box Use Let’s Encrypt to obtain SSL certificate.

4. Click Save.

This will generate an SSL certificate for Roundcube. Wait a few minutes, then you can access Roundcube securely using https.