It looks like we’ve suffered from some sort of attack against our proxy servers, which has unfortunately resulted in the need to reboot them.
This process is underway at the moment, and we hope to have services restored shortly. We are currently blocking some POP3S services, as this is the source of the attack, we believe, and we will look to restore these as soon as we can.
Please accept our apologies and be assured we’re working hard to restore service and figure out how we can prevent a recurrence.
Update – 14:15
Everything should now be back up and running properly.
We’ve managed to patch some software to control the connections coming in on POP3 over SSL so that another attack on that port shouldn’t overload the servers.
We will, of course, continue to watch closely!