We have now identified the issues that have been contributing to this. A recent misconfiguration which caused some data packet loss, the symptoms of which were hidden by the 'denial of service' attack. At the present time, the denial of service appears to have been stopped and configuration changes have been made to overcome the packet loss problems. As we continue to diagnose the information from the weekend it may be necessary to take further short outages for some of our services. Mail is now being received normally, however there is a significant backlog and it is likely this will not be cleared for several hours.
Customers can therefore expect to some delay in their incoming email for a period.
Outgoing email continues to perform normally. We regret the inconvenience this is causing and assure you we have been doing our utmost to identify and resolve the problem as quickly as possible.