Instead of placing bare mailto: hyperlinks into your pages, where spambots can harvest them, use the MailTo plug-in. When you select the MailTo plug-in, enter the email address you want to place in the page.

This will be broken down into substrings, and reassembled by JavaScript at the time the page is viewed. It will be displayed as a hotlinked email address (ie. the anchor text and href destination are the same). If JavaScript is disabled on the client browser, the email address will be displayed as user [AT] domain.com.