McAfee update glitch kills email servers

A glitched update released last week caused McAfee security products to crash, affecting email systems. 

The affected update (DAT 66822) was pushed out to corporate customers and affected six McAfee poducts including email and web security, email gateway, and GroupShield. McAfee said users should not upgrade to the affected DAT file and instead apply the subsequent fixed update (DAT 66823).