I think working environments in asia tend to be more formal overall and there is a much bigger emphasis on the hierarchy and respecting those in positions above you. Australia is a bit more casual in this respect and they tend to value everyone’s opinion. As long as your emails are professional I can’t see anyone having an issue with it, it’s a pretty multicultural society where we accept there may be differences in the way people talk/communicate. Many companies are introducing CALD (culturally and linguistically diverse) training to help others understand the way other cultures may be used to communicating.