Classic ASP

Unobfuscate a Spammy Email

Demonstrates the Chilkat Email.UnSpamify method, which unobfuscates an email by undoing common spammer tricks — it removes comments from HTML bodies and unobfuscates hyperlinked URLs. This example cleans an HTML body whose link was broken up by an inserted comment.

Background: Spammers deliberately scramble HTML to slip past filters — inserting empty comments in the middle of words or URLs (example.com), or otherwise obfuscating links — so the message renders normally to a human but confuses naive keyword matching. UnSpamify reverses those tricks, producing a normalized body that is easier to analyze, classify, or scan for the real destination of its links.

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Classic ASP

<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
</head>
<body>
<%
'  Demonstrates the UnSpamify method, which unobfuscates an email by undoing common spammer
'  tricks: it removes comments from HTML bodies and unobfuscates hyperlinked URLs.

set email = Server.CreateObject("Chilkat.Email")
email.Subject = "UnSpamify example"

'  An HTML body with an obfuscating comment inserted into a hyperlink.
email.SetHtmlBody "<html><body>Visit <a href=""http://exa<!--x-->mple.com"">our site</a>.</body></html>"

'  Undo the obfuscation.
email.UnSpamify 

cleaned = email.GetHtmlBody()
Response.Write "<pre>" & Server.HTMLEncode( cleaned) & "</pre>"

%>
</body>
</html>