function codex15766_custom_email_message() {

    // Do not create if it already exists and is not in the trash
    $post_exists = post_exists( '[{{{site.name}}}] New post comment.' );

    if ( $post_exists != 0 && get_post_status( $post_exists ) == 'publish' )
       return;

    // Create post object
    $my_post = array(
      'post_title'    => __( '[{{{site.name}}}] New post comment.', 'buddypress' ),
      'post_content'  => __( '{{commenter.name}} commented on your blog post.', 'buddypress' ),  // HTML email content.
      'post_excerpt'  => __( '{{commenter.name}} commented on your blog post.', 'buddypress' ),  // Plain text email content.
      'post_status'   => 'publish',
      'post_type' => bp_get_email_post_type() // this is the post type for emails
    );

    // Insert the email post into the database
    $post_id = wp_insert_post( $my_post );

    if ( $post_id ) {
    // add our email to the taxonomy term 'post_received_comment'
        // Email is a custom post type, therefore use wp_set_object_terms

        $tt_ids = wp_set_object_terms( $post_id, 'post_received_comment', bp_get_email_tax_type() );
        foreach ( $tt_ids as $tt_id ) {
            $term = get_term_by( 'term_taxonomy_id', (int) $tt_id, bp_get_email_tax_type() );
            wp_update_term( (int) $term->term_id, bp_get_email_tax_type(), array(
                'description' => 'A member comments on a posts',
            ) );
        }
    }

}
add_action( 'bp_core_install_emails', 'codex15766_custom_email_message' );

function bp_comment_inserted( $comment_id, $comment_object ) {

    if ( $comment_object ) {
        // get the post data
        $post = get_post( $comment_object->comment_post_ID );
        // add tokens to parse in email
        $args = array(
            'tokens' => array(
                'site.name' => get_bloginfo( 'name' ),
                'commenter.name' => $comment_object->comment_author,
            ),
        );
        // send args and user idto recieve email
        $r = bp_send_email( 'post_recieved_comment', (int) $post->post_author, $args );
    }
}
add_action( 'wp_insert_comment','bp_comment_inserted', 99, 2 );