用system.net.mail来发送邮件，出现异常！急
<%@ Page Language= "C# " %>
<%@ Import Namespace= "System.Net.Mail " %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN " "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd ">
<script runat= "server ">
protected void Button1_Click(object sender, EventArgs e)
{
System.Net.Mail.MailMessage msg = new System.Net.Mail.MailMessage();
msg.From = new MailAddress( "yuzhen20@126.com ");
msg.To.Add(new MailAddress(TextBox1.Text));
msg.Subject = TextBox1.Text;
string attachFile;
attachFile = @ "C:\Documents and Settings\X\桌面\1\说明.txt ";
System.Net.Mail.Attachment mailadd = new Attachment(attachFile);
msg.Attachments.Add(mailadd);
SmtpClient smt = new SmtpClient();
smt.Host = "smtp.126.com ";
smt.Send(msg);
}
</script>
<html xmlns= "http://www.w3.org/1999/xhtml " >
<head runat= "server ">
<title> 无标题页 </title>
</head>
<body>
<form id= "form1 " runat= "server ">
<div>
<asp:Label ID= "Label1 " runat= "server " Text= "收件人地址： "> </asp:Label>
<asp:TextBox ID= "TextBox1 " runat= "server " Width= "216px "> </asp:TextBox> <br />
<br />
<asp:Label ID= "Label2 " runat= "server " Text= "主题： "> </asp:Label>
<asp:TextBox ID= "TextBox2 " runat= "server " Width= "219px "> </asp:TextBox> <br />
<br />
<asp:Label ID= "Label4 " runat= "server " Text= "附件： "> </asp:Label>
<asp:FileUpload ID= "FileUpload1 " runat= "server " /> <br />
<br />
<asp:Label ID= "Label3 " runat= "server " Text= "内容： "> </asp:Label> <br />
<asp:TextBox ID= "TextBox3 " runat= "server " Height= "176px " Width= "348px "> </asp:TextBox> <br />
<br />
<br />
<asp:Button ID= "Button1 " runat= "server " Text= "发送 " OnClick= "Button1_Click " />
<asp:Button ID= "Button2 " runat= "server " Text= "取消 " /> </div>
</form>
</body>
</html>
[解决办法]
在IIS里打开了简单邮件协议了吗?
[解决办法]
把你的防火墙关闭试试
[解决办法]
在web.config中还需要配制
[解决办法]
发送邮件的代码很多，如果排除代码的原因的话
你可以仔细看看防火墙或杀毒软件的设置