We mark thousands of domains in our Truemark service, representing more than 1700 companies. One of our biggest challenges (which is shared by companies themselves) is keeping up with all the domains used to send email. Most consumers would assume that email is sent from the main corporate domain (e.g., company.com), but that’s not the case. In reality, while there may be one main front door for web visits, there are usually many side doors (and windows, and vents, and…) for sending email. It varies by company: Large multinationals usually have domains tied to specific countries (e.g., company.co.uk, company.ca, company.fr) [...]