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Hi Fabio! I can't find any good updated information on this either, so I am marking it as Discussion to get the conversation going. From what Pete said on the other post two years ago, it sounds like they may pick it up in a similar way to how Google does: with recognition, but will ignore it if it doesn't make sense. It would be good to hear from people who have implemented this and seen results in Bing, if anyone has experience with this.

Just to let you know that the page was indexed in less than 24hrs. We didn't use Tony's tiip (share on G+) but we did all the following: Used GWT tool - fetch as googlebot Submit the URL using the button that appears after fetching as googlebot Included some sidewide links to the page Included the page in our sitemap.xml Thanks all folks who added some insights and tips!

Fabio, If you are taking the time to redirect to a 404 page, I would suggest using a 301 to a page that is active. Instead of wasting the link juice on a 404 page, you can pass it on to something that is active and useful to your visitor (even a "help" page) The key here is to find a new page that is at least somewhat connected to what was on the dead link's URL.