Blocking file attachments that are most commonly used to spread viruses will help protect University computer systems and data.
ITS uses the following list of attachments that will automatically be blocked due to their potential risk:
Newly added file extensions (per Microsoft)
Updated 3/19/20: In April 2020, Microsoft is adding the following to the list of blocked attachments:
Messages containing these attachments are still delivered but the file attachment is removed. You will receive an error message from Postmaster with the subject of "Undeliverable message"
This message was created automatically by mail delivery software. Your email message was not delivered as is to the intended recipients because malware was detected in one or more attachments included with it. All attachments were deleted.
--- Additional Information ---:
Subject: attachment test
Time received: 6/22/2017 5:14:09 PM
All messages with an attachment that is considered safe (or that has no attached file) will be delivered intact. Office productivity files (documents, spreadsheets, etc), text files, and other files that are not executable programs will be delivered as usual.
If a *.zip file contains a file with an extension (such as .EXE), which is in the list of suspect attachments above, the entire zip file is removed.
Encrypted/Password Protected Attachments
If a file attachment is encrypted, or if it is password protected, and therefore cannot be examined for malicious code, the entire message including the attachment will be delivered (Examples are encrypted .zip files, and password protected office productivity files.) No warning is given to the recipient that the file has not been scanned.