I have asked about this on the WHMCS forums, but where directed here. I run a setup where i have WHMCS as my store. But when a new order is placed, it gets through, but plesk fails with this error: New configuration files for the Apache web server were not created due to the errors in configuration templates: Template processing failed: file = /opt/psa/admin/conf/templates/default/webmail/webmail.php, error = Template_Exception: Empty content was provided for config file /etc/apache2/plesk.conf.d/webmails/"name-of-new-domain"_webmail.conf file: /opt/psa/admin/plib/Template/Writer/Webserver/Abstract.php line: 47 code: 0. Detailed error descriptions were sent to you by email. Please resolve the issues and click here to generate broken configuration files once again or here to generate all configuration files. See the details in Configuration Troubleshooter I really hope someone out there can help me with this, cause it is driving me nuts.