Mesa E-Mail Address Finder is the GREAT E-mail directory. This "one-stop-shopping" e-mail search engine found one of my e-mail addresses which I never submitted to any of the standard directories. I use it all the time. Mesa E-Mail Address Finder

My E-Mail Address Is (yes, that's the name of it) is another site which will search several directories at once. This one brings up a separate window for each directory it's searching. It's a little different, but it works quite well. My Email Address Is

You should try your search on each individual site below. You never know which e-mail directory your subject has registered with, and not all of them are covered by the mega search engines above.