Exchange 2003 not receiving external e-mails

If you run into this problem where you have an SBS 2003 or Exchange 2003 server not receiving external e-mails or even sporadic, intermittent e-mails, check the self signed SSL cert that the CIECW creates.  More than like it’s expired.  If you re-create it by re-running the wizard and telling it to create a new certificate, you should be golden.  I racked my brain and hours trying to get this to work.