The question is wrong. Any email provider will read your email, at least for spam detection. He's clearly talking about humans reading your mail. No email pro

The question is wrong. Any email provider will read your email, at least for spam detection. He's clearly talking about humans reading your mail. No email provider has humans reading your mail for purposes of spam detection, at least not in the usual case. The question is perfectly valid: seeing that other companies have clear policies on the extent to which employees can access your data, how come Google doesn't have any such policies?