C# 发送邮箱

        public static int SendEmail(string mailContent, string mailSubject, string mailTo)
        {
            // 设置例网易的smtp
            string smtpServer = "smtp.qq.com";// "14.18.245.164"; //SMTP服务器
            string mailFrom = "XXXX@qq.com"; //登陆用户名
            string userPassword = "XXXXXXXXX";//登陆密码

            // 邮件服务设置
            SmtpClient smtpClient = new SmtpClient();
            smtpClient.EnableSsl = true;
            smtpClient.UseDefaultCredentials = false;
            smtpClient.DeliveryMethod = SmtpDeliveryMethod.Network;//指定电子邮件发送方式
            smtpClient.Host = smtpServer; //指定SMTP服务器
            smtpClient.Timeout = 5000;
            smtpClient.Port = 587;
            smtpClient.Credentials = new System.Net.NetworkCredential(mailFrom, userPassword);//用户名和密码
           
            MailMessage mailMessage = new MailMessage(mailFrom, mailTo); // 发送人和收件人
            mailMessage.Subject = mailSubject;//主题
            mailMessage.Body = mailContent;//内容
            mailMessage.BodyEncoding = Encoding.UTF8;//正文编码
            mailMessage.IsBodyHtml = true;//设置为HTML格式
            mailMessage.Priority = MailPriority.Low;//优先级

            try
            {
                ServicePointManager.ServerCertificateValidationCallback =
                           delegate (Object obj, X509Certificate certificate, X509Chain chain, SslPolicyErrors errors) { return true; };
                smtpClient.Send(mailMessage); // 发送邮件
                return 1;
            }
            catch (SmtpException ex)
            {
                Logger.Create("- 邮件发送异常", ex.ToString());
                return 0;
            }
        }