I respectfully disagree, you and KD are not the only ones who have it right.
DO NOT SEND an email. As it was posted - he's not going to read 100's to 1000's of welcome aboard emails.
Trust me, CEO's look to the bottom line and all too often the more skilled worker gets let go because he/she earns more than a younger less skilled person.
No one is irreplaceable in the workforce, I repeat no one.