Using HTML code like the following on a web page will make it more difficult for e-marketers to harvest your e-mail address. But, it will still allow others to contact you easily.

Your web page would display "Comments or Questions?" as an active link. People who click on the link would be able to send a message to the e-mail address you provide. <a href="mailto:my_e-mail_address@udel.edu"> Comments or Questions?</a>