The email is very confusing, and I didn't know what an internet keyword is until I read your post. It seems its a chinese initiative - see
http://www.quickonlinetips.com/archi...rnet-keywords/. Have you registered any internet keywords? (I'm guessing not.)
The sentence that concerns me is the one about affecting your intellectual property rights on the internet. Although no money is mentioned, I wonder what would happen if you replied that you had no connection to the Bosch company? Would they then ask for some money to register "your" internet keywords and keep them safe?
My personal view (and this is all it is - please don't mistake it for advice, because I'm NOT a lawyer), is that if I were in this position, nothing would happen if I did nothing. My domain would be with a UK DNR and hosted in the UK and internet keywords are a chinese thing.
Simon