My staff send mailings to students via an application hosted on nTWeb11. Apparently, everything that was sent out via that server today is being delayed, as they are getting hundreds of bounce back messages similar to the one below. Is anyone else seeing similar issues or aware of what's going on? Thanks, Al From: Mail Delivery Subsystem <[log in to unmask]<mailto:[log in to unmask]>> Date: August 25, 2011 5:40:39 PM GMT-04:00 To: < [log in to unmask]<mailto:[log in to unmask]>> Subject: Warning: could not send message for past 4 hours ********************************************** ** THIS IS A WARNING MESSAGE ONLY ** ** YOU DO NOT NEED TO RESEND YOUR MESSAGE ** ********************************************** The original message was received at Thu, 25 Aug 2011 12:05:28 -0400 from ntweb11a.ais.msu.edu<http://ntweb11a.ais.msu.edu> [35.9.164.129] ----- Transcript of session follows ----- < [log in to unmask]<mailto:[log in to unmask]>>... Deferred Warning: message still undelivered after 4 hours Will keep trying until message is 5 days old Reporting-MTA: dns; aisprd3m.ais.msu.edu<http://aisprd3m.ais.msu.edu> Arrival-Date: Thu, 25 Aug 2011 12:05:28 -0400 Final-Recipient: RFC822; person @msu.edu<mailto:[log in to unmask]> Action: delayed Status: 4.2.0 Last-Attempt-Date: Thu, 25 Aug 2011 17:40:39 -0400 Will-Retry-Until: Tue, 30 Aug 2011 12:05:28 -0400