New Email Attachment Filter

To protect users from malicious email messages, the Office of the CIO is implementing an attachment filter service for messages sent to and from the University Email Service.

Why are we doing this?

Email filters are a low cost and low user-impact way to restrict potentially damaging email content from infecting our computers and systems. This will result in fewer compromised machines and potential data loss, better workstation performance and reliability, and a safer computing environment for us all.

How does it work?

When an attachment is sent to a University Email Service account, the filter checks email attachments for the file extensions listed in this Knowledge Base article. These file types are already restricted and blocked from delivery by other email clients (within and outside of the university). If a potentially malicious attachment is detected, the recipient will see the body in its original form, but the attachment will be replaced with a text file that provides details on the attachment and why it was filtered.

If the attachment is sent from a University Email Service account, the sender will receive their own email notification of the filtered attachment, along with some details of the message at hand and what restricted file type they sent.

Both of these notices will direct the reader to more information on the filter in our Attachment Filter article in the Knowledge Base.

When will it take effect?

This new filter service has been vetted through the university’s IT steering committee. We expect it will provide a significant system protection improvement overall, with little intrusion on everyday university business. This filter will be activated on Sunday, October 20, 2013.

Questions? Contact Brant Thomas, Associate Director-Enterprise Messaging Services, at thomas.2519@osu.edu or 614-292-7044.