I don't know why some feel the need to pick on spelling and grammar.

I've known brilliant programmers and engineers who typed like crap,
making many spelling errors in a conversational email. I've also met
superior managers who could barely retrieve email, and needed printed
reports delivered to their desks. All of these examples could do
what they really needed to do, very, very well.

If you want to nitpick the guy's message, fine... But he qualified to
fly F-4's, did serious work for an important defense contractor, and
worked as a NASA engineer. I work with a guy who commanded two
nuclear ICBM subs, has undergraduate and graduate degrees in physics,
nuclear engineering (Naval Academy), and math, and designed towed
arrays as a civilian. I need a "decoder ring" to read his email!

Lots of really fine engineering types dreamed of far more interesting
things through English class...