If email becomes the subject of regulations (laws), then there will be strict rules about what exactly can appear in email messages. Many businesses (companies) advertise their products through email messages so it's understandable they don't want to see email regulated (now it's free advertising and they certainly don't want to lose that). Their emails are usually seen by people (email account holders who recieve such messages) as spam and are undesireable as such.
New words, one handy idiom, and a 2-minute quiz — delivered to your inbox to keep your streak alive.