you add business email like info@mysite.com    but it not work   hosting server provider is provide email services so that your domain and hosting different services provider then you need to add some records in domain account    your domain and hosting server same services provider then it add automatic MX records    I am assume you have create your business email   step 1 : login your account  domain register account   step 2 : then goto manage domain setting there different type of dns record you need to add MX (mail exchange ) record   so   you using google business email so that you add google MX record   all service provider provide the MX or all type of record info in user guide or FAQ page      
i will write here as per my knowledge, and what i have done in practical, i like to make easy solution for all tech and non techky