Well, this certainly should be an eye opener to any spam solutions that delete email.

From ZDNet:

"We were pretty surprised this morning to find that all of the email which arrived overnight had been deleted," wrote Jeremy Whiteley, chief executive officer at Promarketing Gear. "Even more troubling was the fact that, according to GFI's US sales manager, they released this update without testing it! I guess they expect me and my IT staff to play the role of tester, regardless of the cost to my business…We're reconsidering our reliance on GFI going forward."

I think they should just drop GFI altogether and go with SimpleFilter. Disclaimer: I'm a co-founder of SimpleFilter.