string Receiver, string Subject, string content;

//163邮箱发送配置

client = new System.Net.Mail.SmtpClient();

client.Host = "smtp.163.com";

client.Port = 25;

client.DeliveryMethod = System.Net.Mail.SmtpDeliveryMethod.Network;

client.EnableSsl = true;

client.UseDefaultCredentials = true;

client.Credentials = new System.Net.NetworkCredential("****@163.com", "***");  //这里输入邮箱和授权码

System.Net.Mail.MailMessage Message = new System.Net.Mail.MailMessage();

Message.SubjectEncoding = System.Text.Encoding.UTF8;

Message.BodyEncoding = System.Text.Encoding.UTF8;

Message.Priority = System.Net.Mail.MailPriority.High;

Message.From = new System.Net.Mail.MailAddress("****@163.com");

//添加邮件接收人地址

string[] receivers = Receiver.Split(new char[] { ',' });

Array.ForEach(receivers.ToArray(), ToMail => { Message.To.Add(ToMail); });

Message.Subject = Subject;

Message.Body = content;

Message.IsBodyHtml = true;

client.Send(Message);