发件

using System;
using System.Text;
using System.Net.Mail;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;

namespace WebCms.Web.Admin.Email
{
    public partial class SendMail : Page
    {
        public int MailContId;
        public int ClassId;
        public int Property;
        public int State;
        public string setMail = "loself@nc189.com";//发件人地址
        public string setName = "索科特";          //发件人姓名
        public string setMailPwd = "qkngndung0208";  //发件人密码

        public string MailSubject = "邮件主题";     //邮件主题 
        public string MContent = "邮件内容";        //邮件内容

        public string Host = "smtp.qq.com";         //服务器----imap.qq.com  smtp.qq.com

        public string getMail = "915422989@qq.com"; //收件人地址

        protected void btnSave_Click(object sender, EventArgs e)
        {
            StringBuilder str = new StringBuilder();
            System.Net.Mail.MailMessage msg = new System.Net.Mail.MailMessage();
            msg.To.Add(getMail);
            //msg.To.Add("这里填发给地址如WQER@qq.com");

            // msg.To.Add("b@b.com");
            //可以发送给多人 

            //msg.CC.Add("c@c.com");
            //可以抄送给多人 

            msg.From = new MailAddress(setMail, setName, System.Text.Encoding.UTF8);/* 上面3个参数分别是发件人地址（可以随便写），发件人姓名，编码*/
            msg.Subject = MailSubject;                      //邮件主题
            msg.SubjectEncoding = System.Text.Encoding.UTF8;//邮件标题编码 
            msg.Body = MContent;                            //邮件内容 
            msg.BodyEncoding = System.Text.Encoding.UTF8;   //邮件内容编码 
            msg.IsBodyHtml = true;                          //是否是HTML邮件 
            //msg.Priority = MailPriority.High;             //邮件优先级 

            SmtpClient client = new SmtpClient();
            client.Credentials = new System.Net.NetworkCredential(setMail, setMailPwd); //发送的邮箱账号密码。这肯定得写你自己的,我用的126
            client.Host = Host;//imap.qq.com  smtp.qq.com
            object userState = msg;
            try
            {
                //client.SendAsync(msg, userState);
                client.Send(msg);
                Response.Write("<script>alert('发送成功啦')</script>");
            }
            catch (System.Net.Mail.SmtpException ex)
            {
                Response.Write("<script>alert('发送失败啦')</script>");
            }
        }
    }
}