This morning the Systems Operations Center identified a DNS misconfiguration on a newly-deployed email backend server which had been leading to forwarding and aliasing delivery problems resulting in bounced email as well as the possibility that some forwarded messages were not sent. Due to the nature of the misconfiguration it is difficult to accurately assess the number of messages impacted, but any issue which did occur would have happened between roughly midday on Monday the 27th and today (the 28th) at approximately 11:15am. We do not see ongoing delivery issues at this time.