Okay, I've completed my website content and loaded into your server. Only question is, when I change the DNS setting, would it also automatically configure my existing e-mail hosting that is hosted by another registrar?
If the domain is registered with us, you can use our Dynadot DNS service to specify an IP address for the web hosting part and an MX record for the email host. This is not recommended since our Web Hosting Server IP address may not always be the same.
If the domain is not with us, but is using our name servers for Web Hosting, then you wouldn't be able to specify an MX record.