In order to have company email or a website you need to start with a company Domain Name registered on the internet. A little thought will go into this as your first choice might already be taken which will prompt another choice until one is found to be available.

Domain names are made up of the name and an extension after the name for example YourCompany.com

The most popular extention is of course .com but you can choose from several others (examples below) if you qualify

YourCompany.org

YourCompany.net

YourCompany.tv

ECT ..