The spam bots search the websites and create mailing list to send the spam. They take the email addresses written on your website page in text format and send you spam emails.
The spam bots are not able to read the email addresses written on a image (picture format). So to fool them we can create our email addresses written on a image. There is a free service called Spam Proof eMail Generator where you can just enter your email address, choose colors and font types and create a picture of your email address automatically for you.
License: License Free