Smarty Policy Errors


Your WHMCS installation is not sending email or the sent email doesn’t display properly. When you check the log at Configuration () > System Logs, you see the following error:

Smarty Error: Not allowed by security policy


The email template contains advanced code that the default email security policy blocks.


To resolve this issue:

  1. Review the code in the email to confirm what it’s trying to send at Configuration () > System Settings > Email Templates.
  2. Add an exception to the email security policy to allow the desired code.

Last modified: June 11, 2024