China Internet problems

Reuters is reporting that some traffic between China and other countries
is having some problems. and have notified its users
about problems with overseas e-mail.
BEIJING (Reuters) - Internet users and company officials in China on Wednesday blamed a series of disruptions to cross-border email traffic on adjustments to the country's vast Internet surveillance system.

“The Internet treats censorship as damage and…Delivery Status Notification (Failure) Can’t find host

It remains true that censorship is a single point of failure.