.net发邮件的错误

MailMessage Message = new MailMessage();
Message.From = TextBox1.Text;
Message.To = TextBox2.Text;
Message.Subject = "主题、标题11";
Message.Body = "内容22";
Message.BodyFormat = MailFormat.Html;//编码
Message.Priority = MailPriority.High;
SmtpMail.SmtpServer = "smtp.qq.com";//邮件服务器,比如163即为"smtp.163.com",126即为"smtp.126.com"
Message.Fields.Add(" http://schemas.microsoft.com/cdo/configuration/smtpauthenticate", "1");
Message.Fields.Add(" http://schemas.microsoft.com/cdo/configuration/sendusername", "17145886");
Message.Fields.Add(" http://schemas.microsoft.com/cdo/configuration/sendpassword", "tomylove2008");
SmtpMail.Send(Message);
Label1.Text = "成功";

运行出现下面错误代码

·t???÷?ü??á?·￠?tè?μ??·?￡·t???÷?ìó|?a: 503 Command Error

503 Command Error 503错误命令

您好，你这个方法是错误的，给你个地址去看看是怎么发邮件的欢迎加入我的团队，问问编程专家团

http://www.cnblogs.com/sonven/archive/2009/06/24/1510236.html

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