Chart showing how an attack works (IMAGE) University of California - San Diego Caption Example of a spoofed email attack exploiting open forwarding and relaxed validation policies for forwarded email from well-known providers. Credit University of California San Diego Usage Restrictions No restrictions. License Public Domain Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.