Any active domain name that's added in a hosting account features a number of records which allow it to perform properly. In the standard case, the name servers (NS records) show where the domain is hosted and they are set on the side of the registrar company, but on the lower level there are particular records created through the hosting company such as A (IP address of the website/server), MX (e-mail server), SRV (employing an Internet domain for non-website purposes on a certain port number like Voice-over-IP), and so on. Having access to these records and by having the ability to edit them, you may have your website with company A and your e-mail messages with company B, for illustration. This offers you more flexibility as you can pick the best provider for each of these services and you do not have to stick to one company. After you pick a hosting company, you have to make certain that you have access to all DNS records freely since some providers have an extra fee for this feature.