Your online presence is a collection of different elements, including your domain name, website or hosted content and email address. Domains, websites and business email are all pieces of a strong brand. In order to have a professional email address and website there must be a domain. Visitors get to your website by entering your domain in their browser's address bar, and they send emails to your custom address. You can have a domain without an email address or website, but you can't have an email address or website without a domain.