Title: Using Mail Relays to Enhance Exchange Security Author: Amit Zinman Summary: Virus, Trojan and denial of service attacks are quite common these days and Exchange is a popular target for these attacks due its popularity and inherent vulnerabilities. Mail relays can be used to thwart most attacks. I'm constantly discovering that although the concept of mail relays is not new they can be used against the latest sophisticated attacks, just long as they're not the weakest link in the chain of e-mail delivery. Link: http://www.MSExchange.org/pages/article.asp?id=604