There's probably no point in emailing him anyway, as the mail will simply get diverted/forwarded to someone very junior.
When I worked at a railway station people would often hand in letters addresses to the company's MD or CEO. They might have been marked 'Private', 'Confidential', 'Personal' or anything else but it made no difference; they were all simply sent straight to our Customer Relations department, where they were handled by low-paid staff (and most definitely never got anywhere near to the person that they were addressed to).
Most companies will have similar practices and there is rarely any point in addressing mail to senior executives because they'll never read it anyway.