April 19, 2018 MSU IT Services' fix has been implemented and email has been restored.
April 18, 2018 MSU IT Services has a fix in the works and have said it will be put into place at 6am EDT on April 19.
April 17, 2018 Email access is NOT restored
Email to our RT tracking/help desk system (RT) is currently not getting through. You may still contact us via http://contact.icer.msu.edu, and and read and respond to your current issues (tickets) by logging into https://rt.hpcc.msu.edu/ Unfortunately, if you reply via email we will not receive it. You use https://rt.hpcc.msu.edu/ to reply. The RT update requires a change in MSU network security to be complete. MSU IT Services has been contacted and we anticipate a fix soon. We apologize for this inconvenience.
--- 1:20 PM Email access on-campus has been restored. UPDATE: MSU Network Firewall is blocking access, hence email is effectively not restored