C# 发送邮箱

 // 设置例网易的smtp
            string smtpServer = "smtp.qq.com";
            string mailFrom = "XXXX@qq.com"; 
            string userPassword = "XXXXXXXXX";// 邮件服务设置
            SmtpClient smtpClient = new SmtpClient();
            smtpClient.EnableSsl = true;
            smtpClient.UseDefaultCredentials = false;
            smtpClient.DeliveryMethod = SmtpDeliveryMethod.Network;
            smtpClient.Host = smtpServer; 
            smtpClient.Timeout = 5000;
            smtpClient.Port = 587;
            smtpClient.Credentials = new System.Net.NetworkCredential(mailFrom, userPassword);
            MailMessage mailMessage = new MailMessage(mailFrom, mailTo); 
            mailMessage.Subject = mailSubject;
            mailMessage.Body = mailContent;
            mailMessage.BodyEncoding = Encoding.UTF8;
            mailMessage.IsBodyHtml = true;
            mailMessage.Priority = MailPriority.Low;

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