Update: PSU outgoing email being delays
Email that is local to psu.edu such as email.psu.edu,ucs.psu.edu,hmc.psu.edu is not affected. It is just e-mail that is being forwarded to places like gmail.com, yahoo.com, hotmail.com, comcast.net, etc. that is being held.
Story added 15. February 2016, content source with full text you can find at link above.