How to programmatically send additional notification emails in Contact form 7 [closed]

You can manipulate recipients just before sending out the emails with the hook wpcf7_before_send_mail.

Here is a simple script that adds an extra recipient:

add_action( 'wpcf7_before_send_mail', 'add_my_second_recipient', 10, 1 );

function add_my_second_recipient($instance) {
    $properites = $instance->get_properties();
    // use below part if you want to add recipient based on the submitted data
    /*
    $submission = WPCF7_Submission::get_instance();
    $data = $submission->get_posted_data();
    */
    $additional_recipent="[email protected]";
    $properites['mail']['recipient'] .= ', ' . $additional_recipent;
        
    $instance->set_properties($properites);
    return ($instance);
}