C#发送邮件

1、首页发件箱开通SMTP协议，参考： https://www.cnblogs.com/debstu/p/14863941.html

2、

                string fjrUser = OptDataHelper.GetParams("fjrUser");  //发件人邮箱
                string fjrPass = OptDataHelper.GetParams("fjrPass");  //发件人邮箱授权码
                string jsrEmail = OptDataHelper.GetParams("jsrEmail");   //接收人邮箱
                string content = OptDataHelper.GetParams("content");   //邮件内容
                if(!string.IsNullOrEmpty(fjrUser) && !string.IsNullOrEmpty(fjrPass))
                {
                    MailMessage message = new MailMessage();
                    //设置发件人
                    MailAddress fromAddr = new MailAddress(fjrUser);
                    message.From = fromAddr;
                    //设置收件人,可添加多个
                    message.To.Add(jsrEmail);
                    //设置抄送人
                    //message.CC.Add("XXXXX@outlook.com");
                    //设置邮件标题
                    message.Subject = "您有新消息了！";
                    //设置邮件内容
                    message.Body = content;
                    //设置邮件发送服务器,网易163邮箱：smtp.163.com,网易邮箱端口：25
                    SmtpClient client = new SmtpClient("smtp.qq.com", 587);   //端口不建议用25
                    //发件人的邮箱账号和授权码
                    client.Credentials = new NetworkCredential(fjrUser, fjrPass);
                    //设置超时时间
                    client.Timeout = 99999;
                    //启用ssl,也就是安全发送
                    client.EnableSsl = true;
                    //发送邮件
                    client.Send(message);