Go to mail.netextras.com in your web browser, then enter YOUR email address and password, and click login

IN the upper right corner select the options menu then preferences

Once in the preferences select the Filtering and Spam Control Tab, then click the configure link for Forwarding

Enter the email address you want your emails forwarded to and click the save button.

You can now close and log-out.

NOTES:

This restricts forwarding to messages smaller than the specified size. A notification is sent for larger messages

I'm hoping this is self explanatory!

This chooses when the forwarding occurs, it can occur before or after exceptions, friends and spam rules.

It is recommended that you check this option, so you don't forward spam etc, but each situation may different

This deletes the original message after forwarding (or responding):

It is recommended that you do NOT check this option, if you are still checking this account somewhere and merely want a copy going to another email address,  but again each situation may different.  i.e. if you are NEVER going to check this accept directly ( NOT recommended) then you may wish to delete them.