We have a stand alone Linux server that is setup to accept request from fax machines, scanners and printers and authenticate those users and services. It is also used as an SMTP host to relay mail. We also have an exchange 2010 environment. How can we get the stand alone Linux server that is relaying mail to send those documents and relay them through the exchange 2010 server and also how to get email relayed from the Linux server to the exchange 2010 server. I was thinking about creating a receive connector but was not sure and also not sure about the permissions.