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Hmmm ... sounds like you've discovered the perfect free lunch Sam. You might want to familiarize yourself with a fellow writer -- Robert Heinlein. TANSTAAFL (The Moon is a Harsh Mistress).
Be aware that your gigs of Gmail is subject to general purpose data mining and/or any other use they deem lucrative upon a simple unilateral change in their terms of service. By using the service, you've already agreed to be bound by any changes they make.
Caveat to any wannabe 'Deep Throats' -- search out Bernstein or Woodard if you have any juicy tidbits and want confidentiality -- they at least have a track record. I fear Sam is clueless when it comes to guarding sensitive information. Grok it Sam? (Stranger in a Strange Land).