This document provides instructions for customers changing their email service while keeping the same domain name. It outlines 5 steps: 1) Create new email accounts and aliases, 2) Change the MX records with the DNS host to direct email to the new servers, 3) Check email at both new and old inboxes for 4 hours as redirection takes effect, 4) Cancel the prior email service once redirection is complete, and 5) Set up email software to access the new accounts.