发送邮件

System.Net.Mail.SmtpClient client = new System.Net.Mail.SmtpClient();
        client.Host = "smtp.163.com";
        client.UseDefaultCredentials = false;
        client.Credentials = new System.Net.NetworkCredential("自已的163邮件地址", "密码");
        client.DeliveryMethod = System.Net.Mail.SmtpDeliveryMethod.Network;
        System.Net.Mail.MailMessage message = new System.Net.Mail.MailMessage("自已的163邮件地址", "收件人地址");
        message.Subject = "主题测试";
        message.Body = "asp.net发送邮件";
        message.BodyEncoding = System.Text.Encoding.UTF8;
        message.IsBodyHtml = true;
        //添加附件需将(附件先上传到服务器)
        System.Net.Mail.Attachment data = new System.Net.Mail.Attachment(@"UpFile\fj.rar",System.Net.Mime.MediaTypeNames.Application.Octet);
        message.Attachments.Add(data);
        try
        {
            client.Send(message);
            Response.Write("Email successfully send.");
        }
        catch (Exception ex)
        {
            Response.Write("Send Email Failed." + ex.ToString());
        }