Outline what should be included in the introduction, body, and conclusion of a routine and/or positive message.

Introduction: In most cases, you can get right to the point with routine messages. You'll want to adapt your opening to the specific situation. If the message is unexpected or you haven't been in contact with the reader for a long time, a brief explanation of why you're writing is appropriate. Depending on the nature of the message, a few words of "socializing" can be a good way to foster a positive working relationship-just as you usually would do on the phone or in person.
Body: Use the body to expand on the opening so that readers get all the information they need. As you provide the details, maintain the supportive tone established in the opening.
Conclusion: The close is usually short and simple, because you're leaving things on a neutral or positive note and not usually asking for the reader to do anything. Often, a simple thank you is all you need. However, if follow-up action is required or expected, use the close to identify who will do what and when that action will take place.