The process to switch from your current Email service provider to Mail is very simple and depicted in the below image. The migration can be processed without any downtime, and the email migration tools will help you to bring in or copy your existing email data to the respective Mail accounts.
Step 1: Add and Verify the domain or buy a domain.
Step 2: Add users and Create Email Accounts (or) Import Users
Step 3: Create Groups (You can run Test Migration from your provider to Mail for 2/3 users).
Step 4: Configure the MX records of your domain to point to Servers, to start receiving emails to your domain accounts.
Step 5: Once you start receiving emails, perform Email Migration for rest of the users.
For more help in Mail Administration Control Panel, refer this help page.
The 'Features' page provides you an overview of the Webmail and Admin Control Panel advantages. Small Businesses can benefit from our 'Lite' plan which is free for custom domain based email. The administrator can make use of the 10 accounts for a single domain, with POP/ IMAP, Active Sync and extensive control options, which are free and more importantly ad-free.