Plesk

How to enable/disable HTTPS redirection for webmail in Plesk for Linux

  • Dmitry Bystrov

    • Question

    How to enable/disable HTTPS redirection (force webmail to use SSL) for webmail in Plesk for Linux?

    Answer

    A redirection in Webmail from HTTP to HTTPS on a Plesk for Linux server can be configured either via SSL It! extension, by creating a Plesk custom configuration template, modifying the webmail native configuration file or modifying the webmail .htaccess file:

     

    Solution 1:

    Using SSL It! extension for a single domain

     

    1. Install the SSL It! extension.

    2. Secure webmail with an SSL certificate.

    3. Go to Domains > example.com > SSL/TLS Certificates >

    4. Under the Options, enable Redirect from HTTP to HTTPS > click Configure > select/deselect Apply to webmail > click on Update to apply the changes.

     

    Solution 2:

    Disabling redirection to HTTPS via panel.ini for all domains

     

    The HTTPS redirection for webmail can be disabled via Plesk configuration file panel.ini for all domains:

    1. Connect to a Plesk server via SSH.

    2. Open the file in an editor:

      # plesk conf panel.ini

      Add the following lines at the end of the file:

      [mail]
      webmail.forceHttp = true

    3. Save the changes and close the file.

     

    Solution 3:

    Creating a Plesk custom configuration template

     

    1. Connect to a Plesk server via SSH.

    2. Create a directory for custom configuration templates:

      # mkdir -p /usr/local/psa/admin/conf/templates/custom/webmail

    3. Copy the original file webmail.php to the created directory:

      # cp -p /usr/local/psa/admin/conf/templates/default/webmail/webmail.php /usr/local/psa/admin/conf/templates/custom/webmail/

    4. Open the file /usr/local/psa/admin/conf/templates/custom/webmail/webmail.php in a text editor (for example, vi editor) and insert the records below right before the first </VirtualHost> string:

      RewriteEngine On
      RewriteCond %{REQUEST_URI} !^/.well-known/acme-challenge/
      RewriteCond %{HTTPS} off
      RewriteRule ^ https://%{HTTP_HOST}%{REQUEST_URI} [R=301,QSA]

    5. Save the changes and close the file.

    6. Regenerate configuration files for all domains:

      Note: During this operation, the websites will be unavailable for a short period of time. The execution time of this command depends on the number of domains on the server.

      # plesk sbin httpdmng --reconfigure-all

      To disable this redirect, remove the /usr/local/psa/admin/conf/templates/custom/webmail/webmail.php file and repeat step 6.

     

    Creating a Plesk custom configuration template with Plesk Premium Email

     

    1. Connect to a Plesk server via SSH.

    2. Edit the custom configuration template /usr/local/psa/admin/conf/templates/custom/webmail/roundcube.php created by Plesk Premium Email and locate the following text:

      RewriteEngine On
      RewriteRule ^/[a-zA-Z0-9]{16}/(.*) /$1 [PT,L]

    3. Add the following lines after the text block identified in the previous step:

      RewriteEngine On
      RewriteRule ^/[a-zA-Z0-9]{16}/(.*) /$1 [PT,L]
      # Redirect Kolab from HTTP to HTTPS
      RewriteCond %{REQUEST_URI} !^/.well-known/acme-challenge/
      RewriteCond %{HTTPS} off
      RewriteRule ^ https://%{HTTP_HOST}%{REQUEST_URI} [R=301,QSA]

    4. Save the changes and close the file.

    5. Regenerate configuration files for all domains:

      Note: During this operation, the websites will be unavailable for a short period of time. The execution time of this command depends on the number of domains on the server…

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