Personally, I am not sure if it’s true or not. But it looks like the ISP, which my company is using, is under the Live Pilot Program of the Content Filtering Plan. Great, I don’t mind content filtering AS LONG AS it is not going to seriously affect my workflow. Especially I lost my connection to my Google App/Mail account – both my work and personal mail accounts. The mail servers are not down, as I can still access them from my home computer via a remote session.

"Invalid Response", This error code is very common when contents are blocked by Firewall. Anyone experience similar problems too?

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Update at 2009.01.05 1.50pm

The issue may not be related to the Live Pilot. And all services are now resumed to normal service level (as far as I can tell), although I cannot tell the exact reason of why it happens.