PowerBuilder

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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integer li_rc
oleobject loo_Email
string ls_Cleaned

//  Demonstrates the UnSpamify method, which unobfuscates an email by undoing common spammer
//  tricks: it removes comments from HTML bodies and unobfuscates hyperlinked URLs.

loo_Email = create oleobject
li_rc = loo_Email.ConnectToNewObject("Chilkat.Email")
if li_rc < 0 then
    destroy loo_Email
    MessageBox("Error","Connecting to COM object failed")
    return
end if
loo_Email.Subject = "UnSpamify example"

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

//  Undo the obfuscation.
loo_Email.UnSpamify()

ls_Cleaned = loo_Email.GetHtmlBody()
Write-Debug ls_Cleaned


destroy loo_Email