You can change your email used to access GA and receive site notifications and newsletters through your Account Settings.
On a computer:
- Click on the drop menu under your name in the upper right corner
- Click on Account Settings
- Click on 'Change' next to your email information, make changes, and Save
On a mobile device
- Click on the "hamburger" or 3 horizontal bars in the upper right corner
- Click on Account
- Click on Account Settings
- Click on 'Change' next to your email information, make changes, and Save