SMTP发送电子邮件

    class EmailHelper
    {
        /// <summary>
        /// SMTP 发送邮件
        /// </summary>
        /// <param name="senderAddr">发件人邮箱</param>
        /// <param name="senderPwd">发件人邮箱密码</param>
        /// <param name="host">smtp.qq.com</param>
        /// <param name="to">收件人</param>
        /// <param name="subject">主题</param>
        /// <param name="body">邮件内容</param>
        /// <param name="cc">抄送</param>
        public static void SendMail(string senderAddr, string senderPwd, string host, List<string> to, 
            string subject, string body, List<string> cc)
        {
            SmtpClient client = new SmtpClient();
            client.DeliveryMethod = SmtpDeliveryMethod.Network;//指定电子邮件发送方式    
            client.Host = host;//邮件服务器
            client.UseDefaultCredentials = true;
            client.Credentials = new System.Net.NetworkCredential(senderAddr, senderPwd);//用户名、密码


            MailMessage msg = new MailMessage();
            msg.From = new MailAddress(senderAddr, senderAddr);
            foreach (var item in to)
            {
                msg.To.Add(item);
            }
            
            if (cc != null && cc.Count>0)
            {
                foreach (var item in cc)
                {
                    msg.CC.Add(item);
                }
            }

            msg.Subject = subject;//邮件标题   
            msg.Body = body;//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   

            client.Send(msg);

        }
    }