Preventing your e-mail that you placed on your site from being found by spammers is very hard. Some have even taken their e-mail addresses off their sites and replaced them with contact forms to prevent this. Here is a neat .htaccess method to help put a stop to this. This will stop many of the 'bots' or e-mail collecting softwares from sucking e-mail addresses from web pages and adding them to their spam lists. However this will not work 100% of the time, as some do not identify themselves, but its a good start.

RewriteCond %{HTTP_USER_AGENT} Wget [OR]
RewriteCond %{HTTP_USER_AGENT} CherryPickerSE [OR]
RewriteCond %{HTTP_USER_AGENT} CherryPickerElite [OR]
RewriteCond %{HTTP_USER_AGENT} EmailCollector [OR]
RewriteCond %{HTTP_USER_AGENT} EmailSiphon [OR]
RewriteCond %{HTTP_USER_AGENT} EmailWolf [OR]
RewriteCond %{HTTP_USER_AGENT} ExtractorPro
RewriteRule ^.*$ X.html [L]