As a journalist, with sources to protect, working for a publication whose very mission 'corruption fighting' is going to invite problems exactly like these, sho

As a journalist, with sources to protect, working for a publication whose very mission 'corruption fighting' is going to invite problems exactly like these, shouldn't you be using something other than Gmail? I've never needed something like this but a quick search http://www.google.com/#hl=en&source=hp&q=secure+anonymous+email&aq=0&aqi=g10&oq=secure+anony&fp=9733483af0cc9d26 http://www.google.com/#hl=en&source=hp&q=secure+anon... leads me to believe there is a better solution.