MailMessage mailmessage = new MailMessage(); mailmessage.To.Add("接受邮箱");//可以添加多个接收邮箱 mailmessage.From = new MailAddress("发信人地址"); mailmessage.Body = "邮件内容"; mailmessage.Subject = "邮件标题"; SmtpClient smtp = new SmtpClient(); smtp.Host = "这是SMTP比如:smtp.126.com"; smtp.UseDefaultCredentials = false; smtp.Credentials = new NetworkCredential("发送人地址", "发送密码"); smtp.DeliveryMethod = SmtpDeliveryMethod.Network; smtp.Send(mailmessage);