Login via Outlook Web Access https://email.smu.edu.sg

As soon as you are logged in, you should be able to see on the bottom left hand corner of the user interface. Click on "Rules" as highlighted below.

Click on "New" Rule as shown below.

Upon clicking "New", the following box appears as below.
Check on "Forward it to" and enter the email address you wish to forward your email to.
When completed, click on "Save and Close"

Upon clicking "Save And Close", you will be prompted for confirmation again. Click "OK".

Congratulations! Your mails are now forwarded.