You can delegate access to your Gmail to another person so they can view your messages on your behalf.
Enter the e-mail address of the person you'd like to access your account and click "Next Step."
Remember you can only enter a Google Mail address from your domain.
You'll see a confirmation message. Click "Send email to grant access" if you're sure.
The delegate will receive a verification email explaining that you've granted access to them.
After the delegate confirms this request, it may take up to 30 minutes for the verification process to be completed. To see if the delegate has confirmed access to your account, look at the Accounts tab in Settings.
To access the account you've been given access to, in the web-interface.
1. Click the down arrow next to your e-mail address in the upper-right corner.
2. Click Switch account and choose your delegate's email address.
To access the account in Outlook for Windows:
Follow These Instructions.