You can use:
1. A honey pot field (a field hidden by CSS, with an indicator to
"leave this field blank"); if it's filled it's probably a bot, so don't
process... or
2. CFCAPTCHA to generate a captcha and make the user type what's
shown; send only if it's a match... or
3. CFFORMPROTECT - http://cfformprotect.riaforge.org/
These are pretty much listed in order of the least effort first. They all work
to varying degrees, but I've found just the honey pot will knock out most of
it.
Robert Harrison
Director of Interactive Services
Austin & Williams
Advertising I Branding I Digital I Direct
125 Kennedy Drive, Suite 100 I Hauppauge, NY 11788
T 631.231.6600 X 119 F 631.434.7022
http://www.austin-williams.com
Blog: http://www.austin-williams.com/blog
Twitter: http://www.twitter.com/austin_
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