i guess if he is sending me 'notices' through emails, this would constitute an official accusation as well.
just check up with your own lawyer friends if email is good enough to be considered official written notice... if not, then ask them to re-send the email in printing form on official letterhead etc and through registered post and what not... but then its up to you what to do with it in the first place... this really annoys me how large companies try to bully regular people. i guess its not limited to india, im sure such crap happens all over the world...