private void button3_Click(object sender, EventArgs e)        {            int result = SendEmail("123456@qq.com", "123456", new string[] { "530794089@qq.com" }, "测试标题", "测试内容", "smtp.qq.com");            MessageBox.Show(result.ToString());        }        ///<summary>        /// 发送邮件        ///</summary>        ///<param name="sendEmailAddress">发件人邮箱</param>        ///<param name="sendEmailPwd">发件人密码</param>        ///<param name="msgToEmail">收件人邮箱地址</param>        ///<param name="title">邮件标题</param>        ///<param name="content">邮件内容</param>        ///<param name="host">邮件SMTP服务器</param>        ///<returns>0：失败。1：成功！</returns>        public static int SendEmail(string sendEmailAddress, string sendEmailPwd, string[] msgToEmail, string title, string content, string host)        {            //发件者邮箱地址            string fjrtxt = sendEmailAddress;            //发件者邮箱密码            string mmtxt = sendEmailPwd;            //主题            string zttxt = title;            //内容            string nrtxt = content;            string[] fasong = fjrtxt.Split(‘@‘);            //设置邮件协议            SmtpClient client = new SmtpClient(host);   //System.Net.Mail.SmtpClient            client.UseDefaultCredentials = false;            //通过网络发送到Smtp服务器            client.DeliveryMethod = SmtpDeliveryMethod.Network;            //通过用户名和密码 认证            client.Credentials = new NetworkCredential(fasong[0].ToString(), mmtxt);  //System.Net.NetworkCredential            //QQ邮箱使用ssl加密，需要设置SmtpClient.EnableSsl 属性为True表示“指定 SmtpClient 使用安全套接字层 (SSL) 加密连接。”            client.EnableSsl = true;            //发件人和收件人的邮箱地址            MailMessage mmsg = new MailMessage();            mmsg.From = new MailAddress(fjrtxt);            for (int i = 0; i < msgToEmail.Length; i++)            {                mmsg.To.Add(new MailAddress(msgToEmail[i]));            }            //邮件主题            mmsg.Subject = zttxt;            //主题编码            mmsg.SubjectEncoding = Encoding.UTF8;            //邮件正文            mmsg.Body = nrtxt;            //正文编码            mmsg.BodyEncoding = Encoding.UTF8;            //设置为HTML格式            mmsg.IsBodyHtml = true;            //优先级            mmsg.Priority = MailPriority.High;            try            {                client.Send(mmsg);                return 1;            }            catch (Exception exss)            {                string msg = exss.Message;                return 0;            }        }