This is impacting a subset of our customers using IMAP and POP email services with us. Incoming emails are currently not coming through. Outgoing should not be impacted at this time. No ETA from the datacenter has been released at this time. Additional information can be found HERE.
Update 2:47 pm CST:
The Data center has provided an ETA of 4:00 pm Mountain Time for restoral.
Update 6:19 pm CST:
Issue appears to be resolved.