Unsure if that email you got is legit? Use this site as a source of known EIU emails for official communications.
From: Information Technology Services
Sent: 2012-08-09
To: Students, Employees
Subject: Banner INB/PAWS Downtime - Sunday
Banner INB and PAWS will be unavailable during the regularly scheduled maintenance window of 6:00am to 12:00pm on Sunday, August 12, 2012.