Corporate email: <Company> will never ask you for personal information in an email. When you click on a link, the address should always contain "company.com/".
Same corporate email: All the links in the email contain "company-online.com/".
@adam I believe the confusion revolves around what "the address" means, I assume they meant "the URL in the address bar of the browser", not "the address in the href attribute of the link tags that shows in the plaintext version of the email".