Unable to access webmail when webmail configuration does not exist on a Plesk for Linux server: The requested URL was not found on this server

Symptoms

• Horde/Roundcube webmail is unreachable with one of the following error messages in a web-browser:

  PLESK_INFO: Not Found
  The requested URL /roundcube/index.php was not found on this server.
  Apache Server at webmail.example.com Port 80

  ---

  PLESK_INFO: The requested URL /login.php was not found on this server.

  ---

  PLESK_INFO: The requested document was not found on this server.
  Web Server at example.com

• When opening webmail.example.com in a web-browser, the Web Server's Default Page is shown or the page it is redirected to the domain example.com.

• Webmail configuration is missing in Apache:

  • on CentOS/RHEL-based distributions:

    # httpd -S | grep "webmail.example.com"
    #

  • on Debian/Ubuntu-based distributions:

    # apache2ctl -S | grep "webmail.example.com"
    #

Cause

Misconfiguration of the web-server.

Resolution

1. Connect to the Plesk server via SSH.

2. Make sure webmail configuration is included in Apache configuration file zz010_psa_httpd.conf using the command below:

   • on CentOS/RHEL-based distributions

     # grep webmails /etc/httpd/conf.d/zz010_psa_httpd.conf
     IncludeOptional '/etc/httpd/conf/plesk.conf.d/webmails/*.conf'

   • on Debian/Ubuntu-based distributions

     # grep webmails /etc/apache2/conf-enabled/zz010_psa_httpd.conf
     IncludeOptional '/etc/apache2/plesk.conf.d/webmails/*.conf'

   If the line above does not exist, add it using a text editor (for example, the vi editor).

3. Repair server-wide configuration:

   # plesk repair web -server