You can verify your email address under the profile page of your account.
Step by step: Verify email address
- Navigate to your profile page by clicking the 'Profile' link in the upper-right hand drop down menu
- Click the 'Manage email addresses' link
- Click the 'Resend verification email' link
- Check your email inbox for a message from email@example.com with a verification link
- Click the link to verify your address.