how to get SmtpClient from my host

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C#

ASP.NET

C#4.0

hi all :)



I'm trying to learn sinding emails from web page



but I don't know how to get host value here : smtpClient(string host);



I have a host with domain name "something.net" for example, what value should I set above ?

I tries to set the same name of my host " something.net ", but didn't work :(

here is my code

protected void Button1_Click(object sender, System.EventArgs e)
    {
        try
        {
            MailMessage message = new MailMessage("something1@live.com", "something2@live.com", "hi", "hi hi hi");
            SmtpClient emailClient = new SmtpClient("I dont know what I have to put here");
            emailClient.Send(message);
            Label1.Text = "Message Sent";
        }
        catch (Exception ex)
        {
            Label1.Text = ex.ToString();
        }
    }

thank you all :)