Update: Known Error Impacting Outgoing Emails
Penn State IT has implemented a fix as of 11:05 a.m . There will be a delay in the processing of these messages (approximately 1 hour), but they
will successfully be delivered without an error. This alert will be updated as soon as more information is received.
More information: Update: Known Error Impacting Outgoing Emails
Story added 24. May 2018, content source with full text you can find at link above.