I upgraded from a Exchange 2003 server (no SSL) to a new server with Exchange 2010 with SSL. Now my other servers that use my mail server to send mail, no longer can. Ex: My EPR server sends out Invoices automatically, it no longer does. Of course I have reconfigured my ERP server to look at my new mail server. I do not know a lot about SSL. Do I need a certificate installed on every server that will be using it to send email? Is this the problem?