在.net中发送e-mail (50分)

Dim themailmessage As New MailMessage()
Dim themailconnection As SmtpMail
themailmessage.From = TextBox1.Text
themailmessage.To = TextBox2.Text
themailmessage.Subject = TextBox3.Text
themailmessage.Body = TextBox4.Text
themailconnection.Send(themailmessage)
各位：请看我错在那里了，我知道可能是我的机器没有设置SMTP协议，如果是这个的原因，我该如何设置？

添加删除中-》Windows组件-》Internet...(IIS)-》SMTP Service

IIS我已经安装上了SMTP Service 我也有，就是不知道如何配置

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添加删除中-》Windows组件-》Internet...(IIS)-》SMTP Service