receiving mail

From: jay (anonymous_at_discussions.microsoft.com)
Date: 04/22/04 

Date: Thu, 22 Apr 2004 06:42:47 -0700

I recently set up exchange 5.5 on my sbserver. All of my
mx records are correct. I can not receive any email. I'm
not sure what the issue is. Are there any sure things that
I need to look for??????????