You can easily change your account email by logging in to your Hostinger account.
Once logged in, click on the profile icon and choose the Account Information option:
Once there, scroll down to the Account settings section. Click on an arrow near Email:
Enter your new email address and click on Save changes:
Next, confirm by entering your password. Once the change is applied, you will be requested to verify this change via email or through your two-factor authentication if you have enabled it 😊