Procedure
- Log on to the Windows server.
 - Open Server Manager.
 - Go to .
 - Mark SMTP Server.The Add role services and features required for SMTP Server window appears.
 - Click Add Required Role Services.
 - Click Next.
 - Click Next again.
 - Click Install.The Web Server IIS and SMTP Server installs.
 - Click Close.
 - Go to .IIS 6.0 Manager opens.
 - Expand ServerName (local device).
 - Right-click [SMTP Virtual Server #1] and click
                        Properties.

Note
Mark Enable logging for future troubleshooting. - Go to and select Only the list below, and then click Add....
 - In the IP address field, specify 127.0.0.1, then
                        click OK.

Note
Repeat to specify all IP addresses on local server - Click OK.
 - Go to  and specify the Masquerade domain in the following format:
                        
psproxy.<domain>.<com/org>. - Click OK twice to close the SMTP Virtual Server #1 Properties window.
 - Go to .
 - Open SMTP ServerName, specify 127.0.0.1, then click Apply.
 
Configuring Advanced Premise
Procedure
- On a Windows DNS Server, open DNS Management Console.
 - Right-click the forward lookup zone for the domain, and select Other New Records.
 - Scroll down and select TEXT (TXT).
 - Leave Record Name blank, and specify:
v=spf1 ip4:<external_PolicyServer_IP_address> -all - Click OK.
 
		