Powerby disable on email footer. Default is true.
Source
File: /inc/class-email-template.php
Used by: /inc/class-email-template.php
Example:
function prefix_wp_travel_disable_email_template_poweredby() { return true; } add_filter( 'wp_travel_disable_email_template_poweredby', 'prefix_wp_travel_disable_email_template_poweredby' );