<input type="text" name="Mail" id="Mail"/>     <span>*請輸入郵箱</span><br/>     <asp:Button ID="zhuce" runat="server" Text="tijiao" OnClick="btn" />

protected void btn(object sender, EventArgs e)    {      string mail = Context.Request["Mail"];      MailMessage message = new MailMessage();      message.From = new MailAddress("######", "#####");//發件人地址      message.To.Add(mail);//目標發件地址      message.Subject = "dssdds";//郵件標題      message.Body = "nihao";//郵件內容      //發送郵件的smtp服務器地址      SmtpClient smtp = new SmtpClient("smtp.163.com");      smtp.Credentials = new NetworkCredential("#########", "######");//發件人的用戶名和密碼      smtp.Send(message);    }