404 Error Pages (5 Templates)
The Error 404 “Page not found” is the error page displayed whenever someone asks for a page that’s simply not available on your site. The reason for this is that there may be a link on your site that was wrong or the page might have been recently removed from the site. As there is no web page to display, the web server sends a page that simply says “404 Page not found”.
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I found your blog post while searching Google. Very relevant especially as this is not an issue which a lot of peaople know that well