Step 1: Login to myRent
Step 2: Click on your initials top right of the screen
Step 3: Select My details
Step 4: replace your existing email address with your new one and select Save
This will also update your email on the peoples page of the tenancy.
Please note that if you only change the email address on the people page of the tenancy this won't update the email that is used to login into myRent with and receive notifications to