This type of message, popularly referred to as a documentation message, is termed one that is meant for confirmation of events, ideas, or discussions or, it could imply a change in plans or instructions to do a set of tasks. It serves as a reminder as it can be restated to the earlier message to avoid confusion and miscommunications.

This type of email message is often sent within an organization, to frame one, you need to use a direct approach by letting the message focus on the important issue. Use a list or bulleted pointers to explain the steps clearly. Ensure you ask for feedback from your receivers to clarify any changes from their end, so you can add up to the original mail and overall, keep it precise to the issue you present.