Their website was also down. Later on the website there was a static message: "I'm sorry, the server your email is on is currently down. We apologise for the i

Their website was also down. Later on the website there was a static message: "I'm sorry, the server your email is on is currently down. We apologise for the inconvenience; any email sent to you during this time is being queued by another server and will be delivered as soon as the server is working again." so their mail servers were also down, not just the interface. And the Twitter message says "We've just lost network to a couple of racks," So to me it's interesting that it seems their whole infrastructure depends on these couple racks in a single place. Many people rely on e-mail for their work, and DNS updates are slow, so it's not easy to quickly start receiving e-mail elsewhere if anything happens to that place.