A plugin that sends HTTP 410 (Gone) responses to requests for articles that no longer exist on your blog.
This plugin will issue a HTTP
410 response to requests for articles that no longer exist on your blog. When you delete a post or page, it records the URL for that page and issues a
410 response when that URL is requested. You can also manually manage the list of obsolete URLs.
The HTTP Specification defines the
410 response header for use when a resource has been permanently removed. It informs robots visiting your site that the requested content has gone, and that they should stop trying to access it.