People | PSU | Departments
Skip to contentSkip to search

NOTICE: IT Alerts has been shut down as of April 17, 2019 00:00 Eastern.   Replacement:

IT Alert - Resolved: Known Error impacting Outgoing Penn State Emails


IT Alerts by Date

Info about the IT Alerts Replacement

  • red boxCurrent Alert
  • green boxResolved Alert
  • orange boxFuture Alert

Resolved: Known Error impacting Outgoing Penn State Emails

Last updated on March 31, 2018 at 8:06AM

Update on March 31, 2018 at 8:06AM

As of 8 a.m. ET, on March 31, 2018, the block has been lifted.

Update on March 30, 2018 at 1:34PM

A current work around to avoid email delivery errors is to use the email service\'s Web Client (instead of locally installed clients such as Thunderbird or Outlook).Penn State IT has implemented a fix by sending the email messages to other email services that are not being blocked to be processed. There will be a delay in the processing of these messages, but they will successfully send.

Per Hotmail, the vendor, this issue will be fixed within the next 48 hours. 

Penn State IT will update this alert as more information becomes available.

Update on March 30, 2018 at 8:55AM

At this time,only is being blocked by Microsoft.

Original Alert

As of 3:00 a.m. ET, on March 29, 2018 Microsoft began rejecting email sent by one of 
Penn State's outgoing email servers. Clients such as Outlook, Thunderbird, 
Apple Mail, Android Mail, and iOS Mail may have trouble sending email to 
addresses that end with

Penn State IT staff members have contacted Microsoft, and we believe this issue
will be resolved this weekend. We are currently monitoring the issue, and more
information will be shared as information becomes available.

For more information, please contact IT Service Desk (

NOTE: Historic alerts such as this may be visible for a limited time. For latest alerts, see

Impact Information

  • Incident Type:
    Service Degradation
  • Locations affected:
    All locations
  • Began on:
    March 29, 2018 at 3:00AM
  • Issue Resolved:
    March 31, 2018 at 8:06AM