User876561910 posted
As test I put up a Contact Form yesterday with no anti spam.
It has already been targeted by multiple (lots) of spam-bots.
I have taken it down now.
So has anyone come up with a good (and simple) method of stopping spam-bots from getting through.
Honey-pot?
ASP validation (must be empty) on a CSS visible=none text box (external file)?
JS script?
etc.
I’d prefer to keep this client-side (as my hosts are a pain)
Here is the type of very simple contact us form I’m looking to protect.
Any ideas would be greatly appreciated
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<meta content="text/html; charset=utf-8" http-equiv="Content-Type" />
<title>Some title</title>
<script>
function aa()
{
window.location.href("message OK page .aspx")
}
function error()
{
alert("ooops it all gone wrong");
}
</script>
<script language="vbscript" type="text/vb" runat="server">
Sub MyButton_Click(ByVal sender As Object, ByVal e As EventArgs)
Try
SendEmail()
Page.ClientScript.RegisterStartupScript(Page.GetType(), " ", "aa()", True)
Catch ex As Exception
Page.ClientScript.RegisterStartupScript(Page.GetType(), " ", "error()", True)
End Try
End Sub
Sub SendEmail()
Dim SendResultsTo As String = "MyEmail@some.com"
Dim smtpMailServer As String = "mySMTP settings"
Dim smtpUsername As String = SendResultsTo
Dim smtpPassword As String = "my SMTP password"
Dim MailSubject As String = "Some title"
Dim MailMessage As String = "From: " & YourName.Text & vbCrLf & vbCrLf & "EMail: " & YourEMail.Text & vbCrLf & vbCrLf & "Message: " & Comments.Text
Dim FromEmail As String = "MyEmail@some.com"
Dim myMessage As System.Net.Mail.MailMessage = New System.Net.Mail.MailMessage()
myMessage.To.Add(SendResultsTo)
myMessage.From = New System.Net.Mail.MailAddress(FromEmail)
myMessage.Subject = MailSubject
myMessage.Body = MailMessage
myMessage.IsBodyHtml = False
Dim MailObj As New System.Net.Mail.SmtpClient
MailObj.Host = smtpMailServer
MailObj.Credentials = New Net.NetworkCredential(smtpUsername, smtpPassword)
MailObj.Send(myMessage)
End Sub
</script>
</head>
<body>
<form id="form1" runat="server">
<asp:Label runat="server" Text="Your name" id="LabName"></asp:Label>
<br />
<asp:TextBox ID="YourName" runat="server" Width="150px" />
<br />
<br />
<asp:Label runat="server" Text="Your E Mail" id="LabMail"></asp:Label>
<br />
<asp:TextBox ID="YourEMail" runat="server" Width="150px" />
<br />
<br />
<asp:Label runat="server" Text="Message" id="LabMessage"></asp:Label>
<br />
<asp:TextBox ID="Comments" runat="server" TextMode="MultiLine" Rows="10" Width="400px" />
<br />
<br />
<asp:Button runat="server" Text="Send message" OnClick="MyButton_Click" id="Button1" ></asp:Button>
</form>
</body>
</html>
