By Michael P. Omer , The Washington TimesThe Washington PostWASHINGTON — It’s an email nightmare that’s only getting worse: A new wave of new cyberattacks is taking down companies’ email accounts, and a handful of companies are struggling to protect their data.

The latest is from China, where hackers have hijacked accounts at three major U.S. email providers and used them to attack the Chinese government, state media reported Monday.

The latest attack comes after China launched an extensive crackdown on online dissent, and the latest is likely to fuel worries that the U.K. government could retaliate against Beijing.

China is the largest target of hackers.

It has long been the focus of cyberattacks on U.N. websites and the U