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

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.