: How should I protect "secret" links I send in Emails from being indexed by search engines? I have noticed that bing/msnbot tries to index pages that were only ever linked to in one single
I have noticed that bing/msnbot tries to index pages that were only ever linked to in one single email.
My guess is, that some kind of browser toolbar is responsible for this.
Apart from robots.txt, is there something I can or should do to prevent search engines from indexing private pages, i.e. pages that could only ever be discovered by sniffing "private" content like emails or password protected pages my users browse to?
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If you specifically want to prevent a page/URL from being indexed then include a noindex robots meta tag on HTML responses (or equivalent X-Robots-Tag HTTP response header).
Do not block the page with robots.txt. The robots.txt file primarily prevents the page from being crawled (which has the added side-effect that it probably doesn't get indexed). However, pages blocked by robots.txt can still be indexed if they are linked to (a link-only result appears in the SERPs). And blocking crawling with robots.txt prevents the search engine bots from seeing the robots noindex meta tag. Including the URL in robots.txt can also be an advert to "bad" bots.
However, if the page contains sensitive information or must only be seen by the intended recipient of the email then it should be blocked by some kind of authentication.
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