using System;
using System.Collections.Generic;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Net.Mail;
using System.Net;
public partial class _Default : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
    {
        string mailContent = "这是一封测试邮件";

        MailMessage msg = new System.Net.Mail.MailMessage();
        msg.To.Add("kjhby@sohu.com"); //收件人//www.kjhby.com

        //发件人信息
        msg.From = new MailAddress("*******@gmail.com", "发送人姓名", System.Text.Encoding.UTF8);
        msg.Subject = "这是测试邮件";   //邮件标题
        msg.SubjectEncoding = System.Text.Encoding.UTF8;    //标题编码
        msg.Body = mailContent; //邮件主体
        msg.BodyEncoding = System.Text.Encoding.UTF8;
        msg.IsBodyHtml = true;  //是否HTML
        msg.Priority = MailPriority.High;   //优先级

        SmtpClient client = new SmtpClient();
        //设置GMail邮箱和密码
        client.Port = 587;
        client.Host = "smtp.gmail.com";
        client.UseDefaultCredentials = false;
        NetworkCredential basicAuthenticationInfo = new NetworkCredential(@"*****", "*****");
        client.Credentials = basicAuthenticationInfo;

        client.EnableSsl = true;

        client.Send(msg);

     }

    }