Dart

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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Dart

import 'package:chilkat/chilkat.dart';

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

  final email = CkEmail();
  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();

  final cleaned = email.getHtmlBody();
  print(cleaned);
}