Summary
This chapter discussed how hackers think, how to secure incoming SMTP e-mail, and how to secure Administrator access to your Exchange server. Also discussed were the differences between a virus, a Trojan, and a worm, and a method was outlined for securing inbound SMTP traffic. Two other areas in this book were also referenced that discuss sender filtering and securing OWA. The next chapter discusses how to secure e-mail messages using encryption and certificates.
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