Where does my email client store my email?

Windows: Outlook: C:\Users\<username>\AppData\Local\Microsoft\Outlook Mac OS X: Eudora: /Macintosh HD/Users/<username>/Library/Qualcomm/Eudora/ Entourage 2004: /Macintosh HD/Users/<username>/Documents/Microsoft User Data/Office 2004 Identities/Main Identity/ Entourage 2008: /Macintosh HD/Users/<username>/Documents/Microsoft User Data/Office 2008 Identities/Main Identity/