[转].net 发送邮件 备忘

 System.Net.Mail.SmtpClient client = new SmtpClient();
        client.Host = "smtp.163.com";
        client.UseDefaultCredentials = false;
        client.Credentials = new System.Net.NetworkCredential("yuhai717", "*********");
        //星号改成自己邮箱的密码
        client.DeliveryMethod = SmtpDeliveryMethod.Network;

        System.Net.Mail.MailMessage message = new MailMessage("yuhai717@163.com", "treeyh@gmail.com");
        message.Subject = "测试";
        message.Body = @"<br /><br /><br /><br /><br /><br /><br /><br /><br />用自己写的软件发的邮件！";
        message.BodyEncoding = System.Text.Encoding.UTF8;
        message.IsBodyHtml = true;
        //添加附件
        Attachment data = new Attachment(@"F:\图片\001.jpg", System.Net.Mime.MediaTypeNames.Application.Octet);
        message.Attachments.Add(data);

        try
        {
            client.Send(message);
            ClientScript.RegisterStartupScript(this.GetType(), "key", "alert('成功')", true);// ("Email successfully send.");
        }
        catch (Exception ex)
        {
            ClientScript.RegisterStartupScript(this.GetType(), "key", "alert('失败')", true);
        }