davevsdave

add_filter( 'wpcf7_before_send_mail', 'davevsdave_dynamic_email_based_on_dropdown' );
  
function davevsdave_dynamic_email_based_on_dropdown( $contact_form ) {
    //Get the form ID
    $form_id = $contact_form->id();
    
    //If it's our form with the select dropdown, let's do something...
    if( $form_id == 9487 ) {
        
        //Get the dorpdown value - change "regarding" to the name of your select dropdown menu