Recently I come across a free handy tool called Email antispam generators to prevent email spam from Pingoat.

Email Antispam Generators generate different kinds of email protection so that it made it much difficult for auto email harvesting software to retreive your email from your site.

Based on the email you submitted to the tool online, it will convert it to 1) an image, 2) javascript outout and 3) html encode string. These methods will prevent most of the email harvesters.

Check out Email Antispam Generators