Spammers are known to scan web sites for html "mailto:" commands because they know the next bit of information after that is a valid e-mail address. In addition, mailto: also only works if there is a configured e-mail account on the viewer computer.
A better solution is to use this type of code:
<a href="http://www.louisville.edu/cgi-bin/uofl.mail?username">e-mail me</a>
Be sure to change the "username" in the above example with a real username without the @louisville.edu.
This brings up a script running on our servers and without the mailto it makes it a little harder to harvest e-mail addresses.