After extensive investigation, engineers believe they have isolated and resolved a networking issue which impacted a small number of hosts and services on our network, including web-11 and portions of the Glide email service.
This has been traced to a faulty vSwitch in our virtualisation cluster and has since been patched and updated
Please accept our apologies for any disruption this fault may have caused
Engineers are continuing to monitor the situation but are of the belief that the fault has now been remedied