Yes, you can have your website hosted on one server and emails hosted on another server. The most common reason to this are,
- To configure 'Hosted Exchange' for your email accounts
- To continue use a free email account (gmail, yahoo) under your domain name
- To do email marketing, not allowed by our AUP/TOS
In order to have domain name and email accounts on different servers, you need to modify your MX record of your domain's DNS zone. In Linux system, you can modify the MX record via cPanel and on Windows system you can modify your DNS directly via HELM.
If you are unsure, please raise a support ticket providing us with the required information, to do the setup for you.