I went into the code and found the part I think sends the notification emails. I basically commented the code and returned true.
This is in ./better-wp-security/core
below line 262.
//Commented to turn off email notifications - JAM
//The idea is to trick the make the plugin believe it sent the email and remove it from the queue.
//This code have not been tested.
//$success = wp_mail( trim( $recipient ), $subject, $message, $headers );
$success = true;
Here is my file: https://www.filedropper.com/class-itsec-notify
iThemes, please do something about this. You are selling this as a security product…