DataFlex

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.

Chilkat DataFlex Downloads

Download Chilkat for DataFlex

DataFlex

Use ChilkatAx-win32.pkg

Procedure Test
    Handle hoEmail
    String sCleaned

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

    Get Create (RefClass(cComChilkatEmail)) To hoEmail
    If (Not(IsComObjectCreated(hoEmail))) Begin
        Send CreateComObject of hoEmail
    End
    Set ComSubject Of hoEmail To "UnSpamify example"

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

    //  Undo the obfuscation.
    Send ComUnSpamify To hoEmail

    Get ComGetHtmlBody Of hoEmail To sCleaned
    Showln sCleaned


End_Procedure