Each and every domain name that is registered and hosted has quite a lot of DNS records - some of them are set up automatically when you host a domain, others can be created manually if necessary. As an example, the A record of a domain address is its IP address i.e. this record reveals where the website is located; the MX records show where the emails are managed, while through an SRV record you can use a domain for unconventional purposes, like a Voice-over-IP service. Being able to set up and modify specific records enables you to have different services with different providers if, for example, your present host provides dependable web hosting, but has difficulties with the e-mail service, or you simply prefer to get a certain service from a specific company. Though you must be able to set up and modify these records freely and with no limits as you own a given domain address, many companies charge extra to give you this option.