Encrypt your mailto:

You're going to love this. Hiveware have just come out with Enkoder, a free Mac OS X app to encrypt your mailto: tag and wrap it up in JavaScript to prevent robots from harvesting it..

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Instead of merely breaking up and printing out a standard mailto: tag, The Enkoder generates a unique and random key and ties that to an ecrypted array containing your address for even better protection.

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A web form version and command-line versions for Windows, Linux, FreeBSD and Mac OS X are also available.