Slightly different meanings there: > Happiness isn't expected from an email in this context What I mean to say is that I, personally would be unsatisfied (un

Slightly different meanings there: > Happiness isn't expected from an email in this context What I mean to say is that I, personally would be unsatisfied (unhappy) with sarcasm as a tone towards a client. > I found it to be unprofessional towards the clients, It is not always understood that it is bad to be "unprofessional towards the clients", do not take it for granted that everyone knows that. In fact this person in the original example probably did not. In my experience, while internally, one can be informal, even joke a bit and still be respected for technical ability, it is necessary to take a more formal approach outside of the org in order to be taken seriously.