Between 9:50 PM Pacific time August 9, and 10:49 AM Pacific time August 10 (today), a third-party virus scanner we use incorrectly marked some Microsoft Word attachments as being a virus called “Win.Exploit.CVE_2016_3316-1” and returned them to the sender. This affected several of our customers.
We’ve “whitelisted” this virus pattern to prevent this from happening. However, our logs show that many other ISPs are still incorrectly rejecting this “virus pattern”, so you may still see some rejections if you send Word attachments outside our network until the other ISPs also fix it.
We apologize for the inconvenience this caused any of our customers.