WSM User Guide - WatchGuard Technologies

CHAPTER 24Configuring spamBlockerUnwanted e-mail, also known as spam, fills the average inbox at an astonishing rate. A large volume ofspam decreases bandwidth, degrades employee productivity, and wastes network resources.The WatchGuard® spamBlocker option uses industry-leading pattern detection technology fromCommtouch® to block spam at your Internet gateway and keep it from getting to your e-mail server.spamBlocker looks for patterns in spam attacks, instead of the contents of individual e-mail messages.Because it looks for patterns, it can detect spam in any language, format, or encoding method.About spamBlockerBefore you install spamBlocker, you must have:• A spamBlocker license key certificate• An SMTP e-mail server behind the Firebox®• A SMTP Proxy policy• DNS configured on the Firebox. From Policy Manager, select Network > Configuration. Click theWINS/DNS tab and type the IP addresses of the DNS servers your Firebox uses to resolve hostnames.spamBlocker actionsThe Firebox uses spamBlocker actions to apply decisions about the delivery of an e-mail message that isspam. It can:• Deny — Stop the spam e-mail message from being delivered to the mail server with no reply tothe sender.• Tag —Identify the e-mail message as spam or not spam and allow spam e-mail messages to go tothe mail server. See the subsequent section for more information on spamBlocker tags.• Allow — Let spam e-mail messages go through the Firebox without a tag.User Guide 299