- Urgent - a message is considered urgent if the answer to the question asked (or the information contained in the message) is useful only in the present or the very near future (typically within a few hours)
- Long - a message is considered long if its content is over 500 characters.
When communicating email, it is unreasonable to expect an immediate response. Emails are a more formal means of communication than texting, chatting, or calling. In most cases, it should be treated like paper mail.
Because emails are a formal means of communication, they should always be written with formal language. Misspellings, common internet abbreviations (i.e., IDK, LOL, etc.), and emoji should be avoided (Emoji are permissable in the context of a personal email, but generally discouraged in more formal contexts, such as a business transaction).