使用Mail实现邮件的发送

  MailAddress from = new MailAddress(发送邮箱);
            MailAddress to = new MailAddress(接收邮箱);
            MailMessage message = new MailMessage(from, to);
            message.Subject = 主题;
            message.Body = 内容;
            SmtpClient client = new SmtpClient(邮箱服务器如：(smtp.qq.com), 端口号如：25);
            client.Credentials = new NetworkCredential(发送邮箱, 接收邮箱);
            //client.EnableSsl = true;
            client.Send(message);


前提：发送邮箱己开启POP3/SMTP服务