What are email etiquettes?

Email etiquettes refer to the set of principles one needs to follow while writing or replying to emails. Etiquettes are subjective, and it depends upon to whom you are writing emails.

When writing to a professor, you would obviously want to be more formal when compared to writing mails for a friend. Every email hosting comes with a predefined set of slangs, depending upon who you are writing to. You can also customize your own jargon and quick reply texts.