How do I disable trackback notifications on a WordPress.com blog?

I tried http://astroclimatology.wordpress.com/wp-admin/options-discussion.php but it didn’t work. I do want unregistered users to be able to comment.

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What I dont want is email notifications like this:

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2 comments

  1. Go to your site’s dashboard. Then navigate to Settings ยป Discussion and disable the “Allow link notifications from other blogs (pingbacks and trackbacks)” option:

    Trackback Option

  2. This loop disables trackbacks completely, just needs to be hooked…

    foreach ( get_post_types() as $post_type ) {
    
       /* remove all trackbacks from any post types */
       remove_post_type_support( $post_type, 'trackbacks' );
    }
    

    Or just disable trackbacks by default…