Not sure I understand? You were using Entourage on your PC and now you're using a Mac and trying to access mail? Which mail ISP are you using?
Do you have Entourage installed on your Mac? Entourage is a separate application that is included with MS Office 2004 and 2008. It was discontinued with Office 2011 and replaced by Outlook version 1.0 for the Mac.
I just upgraded to 10.6 Snow Lion. Entourage mail works fine, except the To:, CC:, Subject:, etc. heading fonts at the top is too small. How do I increase the font size and the headings itself? Thank you.