The following code may be used to customize email routing based on a selection in your form. Replace 5 with the ID of your form and replace 4933 with the ID of the email notification. Replace 125 with the ID of a radio/dropdown field. Replace Option 1, Option 2, Option 3, Option 4, and Option 5 with the actual options in your dropdown or radio field.

add_filter('frm_to_email', 'custom_set_email_value', 10, 4);
function custom_set_email_value($recipients, $values, $form_id, $args){
    if($form_id == 5 && $args['email_key'] == 4933){ // change 5 to the id of your form and 4933 with the ID of the email
        foreach ( $values as $value ) {
            if ( $value->field_id != 125 ) continue; //change 125 to the id of the drop-down or radio field
            switch ( $value->meta_value ) {
                case 'Option 1':
                    $recipients[] = 'Michael.@example.com';
                    break;
                case 'Option 2' or 'Option 3' or 'Option 4': // change these values to the choices in your field
                    $recipients[] = 'Abe@example.com';
                    break;
                case 'Option 5':
                    $recipients[] = 'Bob@example.com';
                    $recipients[] = 'Carrie@example.com';
                    break;
                default: //this will be used if none of the other cases occur
                    $recipients[] = 'default@example.com';
                    break;
            }
		unset( $field_id, $value );
        }
    }
    return $recipients;
}

Stop the email notification based on the post status. This code will clear the list of email recipients if the status is set to Draft. Note: You need to add a status field to your form for this code to work properly.

add_filter('frm_to_email', 'stop_the_email', 10, 4);
function stop_the_email($recipients, $values, $form_id, $args){
    if ( $form_id == 5 && $args['email_key'] == 123 ) { //change 5 to the id of the form and 123 to the ID of your email notification
	if ( isset( $_POST['item_meta'][30] ) && $_POST['item_meta'][30] == 'Draft' ) { //change 30 to the ID of the status field
  	    $recipients = array();
	}
    }
    return $recipients;
}