Spam was stopped by free market competition for email accounts. You still get tens of spam messages each day, but you don't see them because your spam filter is

Spam was stopped by free market competition for email accounts. You still get tens of spam messages each day, but you don't see them because your spam filter is good. Telecom monopoly is the reason robocalls still exist. This problem's solution was found a century ago with the Sherman Antitrust Act, but the government refuses to enforce it.