Question

How can i get the LocalhostName, Ip of the machine hosting the Application. For development it would be localhost for deployment something different. This i need to initialize the SmtpClient to send emails through application

SmtpClient emailClient = new SmtpClient("host","port");//port is optional

i am looking for a permanent solution, no workarounds and no sniffing from response, request and this could be spoofed[hope i am not crazy because no one can spoof the servers data in headers can they?]

Answer 1

If you want to configure SmtpClient class, you should have a look at the system.net > mailsettings entry of the web.config : http://msdn.microsoft.com/en-us/library/w355a94k.aspx

<configuration>
    <system.net>
        <mailSettings>
            <smtp deliveryMethod="network">
                <network
                    host="localhost"
                    port="25"
                    defaultCredentials="true"
                />
            </smtp>
        </mailSettings>
    </system.net>
</configuration>

And instanciate the StmpClient with parameterless constructor

var client = new SmtpClient();