Question

email communication has its own set of etiquette guildelines for users to follow if they want to be effectove communicators. which of these is not of these guidelines

Answer 1

Effective not effectove. These are guidelines:
Be brief.
Have a short opening sentence or paragraph that puts the matter in context.
Use the middle paragraph(s) to cover the matter(s) in hand.
Close with a clear agreement of what will be done, by whom, and by when.