SMTP virtual server is the program that needs to be installed and configured on the IIS in order to send e-mail from an ASP.NET Web application. The IIS SMTP service is a simple component for forwarding e-mail messages to an SMTP server for delivery. Whenever we install the SMTP virtual server we have some default settings. Let us discuss some of the settings.

·         Name: The name of the virtual server that appears in IIS Manager

·         IP address/TCP port: All unassigned/25. You can use the General tab in the SMTP virtual server properties dialog box to change this setting. If you change this setting, you must specify an IP address and TCP port combination that is not being used by another SMTP virtual server.

·         Default domain: The domain name that is listed on the Computer Name tab in System Properties. The default domain is used to stamp messages from addresses that do not have a domain. An SMTP virtual server can have only one default domain, and it cannot be deleted.

·         Home directory: C:\Inetpub\Mailroot