We can confirm that as of 10.35am, 19th September 2012, all mail being sent via email or directly from the web interface, has been delayed due to a technical issue. This issue has now been resolved; most messages that were sent will be posted to the lists and distributed within the next few hours. You may have received a message saying your message has been delayed: in this case you don't need to do anything and the message will be delivered in the next few hours. In the unlikely case you have received a message saying your email will not be delivered, you will need to re-send it.

We apologise for the inconvenience this has caused, and want to assure you that we are working to make sure this doesn't occur again in future.