The Simple Mail Transport Protocol is currently installed
Topic Last Modified: 2007-01-22
Microsoft® Exchange Server 2007 setup cannot continue because the Microsoft Windows Server™ 2003 Simple Mail Transfer Protocol (SMTP) service is installed on this computer.
Microsoft Exchange setup requires that the SMTP service not be installed on servers that are used for Exchange 2007.
To resolve this issue, uninstall the SMTP service and rerun Microsoft Exchange setup.To uninstall the SMTP service by using Add or Remove a Windows Component in Control Panel
On the Start menu, click Control Panel.
Double-click Add or Remove Programs.
Click Add/Remove Windows Components.
In the Components list, select the Application Server check box and then click Details.
Select Internet Information Services Manager and then click Details.
Select SMTP Service and then click to clear the check box.
Click OK two times to return to the Components list and then click Next.
Click Finish when the SMTP service is uninstalled.