Scheduled Service Change: On email, file types frequently used for malware to be blocked
When a message with one of these attached file types is refused, Cornell’s email systems will attempt to notify the sender. A "message not delivered" message will be sent, but some systems outside of Cornell’s control (the sender’s email service provider or email application, for example) may interfere with delivery of this notification by classifying it as junk, spam, or for some other reason. Cornell's messaging system automatically replies to the sender when a message cannot be delivered, but the complexity of email ecosystems can sometimes block our efforts.
There is no workaround for this issue
The IT Security Office has requested that a list of file types most often used to deliver malware be blocked from Cornell’s email systems.