I have in DMZ Windows server 2003 with IIS plus SMTP to be use as a mail relay for inbound and outbound mails. I have a public IP and I have open port 25 in the DMZ and not in the internal mail server. Could please someone help me on how to configure the default smtp virtual server in the DMZ and default smtp virtual server and smtp connector in the exchange 2003 mail server? I just don't want for the exchange server 2003 to be an open relay.
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How to setup mail relay/smtp virtual server in DMZ