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.