An email forwarder allows you to forward on all of your email to a different email account. The email will still remain in the original mailbox, but a copy will also be sent to whatever email address you would like it forwarded to. You can setup many email forwarders for the same email if you like.
Login to webmail
To set this up firstly login to your webmail, to do this goto your website address and add /webmail to the end, for example: https://www.yourdomainname/webmail
Webmail Home
Once you have logged in in the top right corner click on "Webmail Home"
Email Forwarders
Then scroll down to the Forwarders option and click
Add Forwarder
On the next page click the "Add Forwarder" button
Add Destination Email Address
On the next screen type in the full email address where you want your email forwarded to and then click the "Add Forwarder" button