C# 发送邮件

1、首先添加引入命名空间:　　using System.Net.Mail;

2、开始写代码，如下：

        /// <summary>
        /// 邮件发送
        /// </summary>
        public JsonResult SendEmail(string Title,string Address)
        {
            bool result = false; 
            string add = "1115924081@QQ.com";
            string CC = "1115924081@QQ.com";
            string File = Server.MapPath("~/Images/1.jpg");
            string user = "15866554223@QQ.Com";
            string password = "123456";    
            SendEmail(Title, add, CC, File, user, password);
            return Json(result, JsonRequestBehavior.AllowGet);
        }
        /// <summary>
        /// 邮件发送
       /// </summary>
        /// <param name="Title">邮件标题</param>
        /// <param name="Address">要发送的地址</param>
        /// <param name="CCTo">抄送人</param>
        /// <param name="toFile">附件</param>
        /// <param name="UserName">邮箱账户</param>
        /// <param name="Password">邮箱密码</param>
        public void SendEmail(string Title, string Address, string CCTo,string toFile ,string UserName, string Password)
        {
            try
            {
                //邮件发送类
                MailMessage msg = new MailMessage();
                //发送的邮箱  可以多个
                msg.To.Add(Address);
                //抄送人  可以多个
                msg.CC.Add(CCTo);
                //附件  可以多个
                msg.Attachments.Add(new Attachment(toFile));
                //三个参数依次是(显示的地址,显示名称，编码)
                msg.From = new MailAddress("840967210@QQ.Com", "我的邮件", System.Text.Encoding.UTF8);
                //标题
                msg.Subject = Title;
                //标题编码
                msg.SubjectEncoding = System.Text.Encoding.UTF8;
                //邮件内容
                msg.Body = "………………测试邮件";
                //邮件内容编码
                msg.BodyEncoding = System.Text.Encoding.UTF8;
                //是否支持Html
                msg.IsBodyHtml = false;
                //优先级
                msg.Priority = MailPriority.High;
                //发送邮件初始化
                SmtpClient client = new SmtpClient();
                //用户名和密码
                client.Credentials = new System.Net.NetworkCredential(UserName, Password);
                //端口号
                client.Port = 465;//或 587
                //主机名
                client.Host = "smtp.qq.com";//接收:imap.qq.com  发送: smtp.qq.com
                //发送
                client.Send(msg);
            }
            catch (System.Net.Mail.SmtpException ex)
            {
                throw ex;
            } 
        }