My suggestion would be not to rely on an automated tool to
check spelling and grammar. I know that Word's grammar checker is
occasionally wrong and there are some words (usually technical
terms) that Word's dictionary doesn't contain by default.
After I write, I go over my material to correct the various
mistakes I introduced while I was writing. After I'm done, I submit
my material for review. The QA team where I work is *supposed* to
check my work but usually only for technical accuracy. For that
reason, I also request a review by my manager and the manager of
one other department. It's amazing what a fresh set of eyes will
find.
Sorry for the rant, but I don't think that technology is
always the best solution to correct and define human
communications. Do you have anyone where you are who could fulfill
this function for you?
-Trip