Each and every domain that is registered and hosted has a lot of DNS records - some of them are created automatically when you host a domain, others can be set up by hand if necessary. For example, the A record of a domain address is its IP address i.e. this record shows where the website is situated; the MX records reveal where the e-mails are handled, while through an SRV record you can use a domain for unconventional purposes, like a Voice-over-IP service. The ability to create and modify particular records permits you to have different services with different providers if, for example, your current host provides dependable web hosting, but has problems with the email service, or you simply prefer to get a specific service from a certain company. Although you can set up and edit these records freely and without any restrictions as you own a given domain name, a lot of companies charge extra to give you this option.
