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If you haven't yet registered your domain with a hosting service, you'll need to find a hosting service such as GoDaddy or FastComet. If you already have your domain hosted on a service, you can usually set up a domain email address from within the service's email settings page. Most email hosting services have various packages which include different perks, such as increased storage space or access to online tools. Pick the package that works best for your needs. This will generally include the following information:  Basic information (e.g., your name, phone number, preferred username, etc.) Domain information (your website's address, login credentials, etc.) Payment information (your credit or debit card number and billing address) Completing the purchase will allow you to begin using your hosted email address. Most hosting services will either send an email or display a page with setup instructions regarding moving your current email's contents over, setting up your email inbox with your website, and so on. You may also have to pick a username and/or a style of inbox (e.g., Microsoft Outlook) here. If your selected email service comes with its own built-in email inbox or email app, you can view and manage your emails using this service rather than setting up another inbox to use your service's settings.

Summary:
Find a paid domain hosting service. Select a paid package. Enter your account details. Purchase the package. Follow any setup instructions. Use your selected service's email app.