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FAQ: Frequently Asked Questions about CGI Programming
Section - 3.2 Can I get the email of visitors?

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Why do you want to do this?

The best information available is the REMOTE_ADDR and REMOTE_HOST,
which tell you nothing about the user.   Techniques such as "finger@"
are not reliable, are widely disliked, and generally serve only to
introduce long delays in your CGI.   Better - as well as more polite -
just to ask your users to fill in a form.

BTW: the "From:" header line (HTTP_FROM variable) is usually only set
by robots, since human visitors to your webpage will not normally want
their addresses collected without permission, and browsers respect this.


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Top Document: FAQ: Frequently Asked Questions about CGI Programming
Previous Document: 3.1 Can I get information about who is visiting?
Next Document: 3.3 "But I saw some.kool.site display my email address..."

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Send corrections/additions to the FAQ Maintainer:
Nick Kew <nick@webthing.com>





Last Update March 27 2014 @ 02:12 PM