Which started with their purchase of Postini, IIRC. One of the premier commercial spam identification and filtering services. Checking this, a quick search fi

Which started with their purchase of Postini, IIRC. One of the premier commercial spam identification and filtering services. Checking this, a quick search finds: https://en.wikipedia.org/wiki/Postini https://en.wikipedia.org/wiki/Postini Oh, and, perhaps a bit ironically with respect to recent conversation and concerns around Google and its acquisitions: In September 2011, Google announced it would discontinue a number of its products, including Google Web Security, which was acquired by Google as part of Postini.[7] On August 21, 2012, Google announced it would be shutting down all of Postini's web services and folding the service's users into Google Apps. I recall that, but it was no longer in my conscious memory.