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Hi all, The problem:Google pointed out to me that I have a large increase of 404 errors. In short I had software before that created pages (automated) for long tale search terms and feeded them to google. Recently I quit this service and all those pages (about 500000) were deleted. Now google GWM points out about 800000 404 errors. What I noticed: I had a large amount of 404's before when I changed my website. I fixed it (proper 302) and as soon as all the 404's in GWM were gone I had around 200 visitors a day more. It seems that a clean site is better positioned. Anybody any suggestion on how to tell google that all urls starting with www.domain/webdir/  should be deleted from cache?