WatchGuard Firebox System 7.0 User Guide

Configuring an SMTP Proxy ServiceAdding address patternsAdding address patterns can be useful for reducing spamcontent. From the Incoming SMTP Proxy Properties dialogbox:1 Click the Address Patterns tab.2 Use the Category drop-down list to select a category.3 Type the address pattern in the text box to the left ofthe Add button.4 Click Add.The address pattern appears at the bottom of the pattern list.Protecting mail servers against relayingHackers and spammers may attempt to use an open relayto send mail from your servers. To prevent this, disableopen relay on your mail servers by restricting the destinationto only your own domain.To further increase protection from mail relaying, modifythe SMTP Proxy settings to allow addresses only from yourdomain. From the Incoming SMTP Proxy Properties dialogbox:1 Click the Address Patterns tab.2 Select Allowed To from the Category drop-down list.3 In the text box to the left of the Add button, enter yourown domain.4 Click Add.5 Save the new configuration to the Firebox.Select headers to allowThe Firebox allows certain headers by default. These arelisted on the Headers tab of the Incoming SMTP ProxyProperties dialog box. You can add more headers to thisUser Guide 143