ZyXEL ZyWALL 5 User Guide - Page 318
The External DB Screen
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Chapter 16 Anti-Spam Screens Table 88 SECURITY > ANTI-SPAM > General LABEL DESCRIPTION Forward SMTP & POP3 mail with tag in mail subject Select this radio button to have the ZyWALL forward spam e-mail with the tag that you define. Even if you plan to use the discard option, you may want to use this initially as a test to check how accurate your anti-spam settings are. Check the email the ZyWALL forwards to you to make sure that unwanted e-mail is marked as spam and legitimate e-mail is not marked as spam. Discard SMTP mail. Select this radio button to have the ZyWALL discard spam SMTP e-mail. The Forward POP3 mail ZyWALL will still forward spam POP3 e-mail with the tag that you define. with tag in mail subject Action taken when mail sessions threshold is reached The anti-spam feature limits the number of concurrent e-mail sessions. An email session is when an e-mail client and e-mail server (or two e-mail servers) connect through the ZyWALL. Use this section to configure what the ZyWALL does when the number of concurrent e-mail sessions goes over the threshold (see the chapter of product specifications for the threshold). Select Forward to have the ZyWALL allow the excess e-mail sessions without any spam filtering. Select Block to have the ZyWALL drop mail connections to stop the excess e-mail sessions. The e-mail client or server will have to attempt to send or receive e-mail later when the number of e-mail sessions is under the threshold. Apply Click Apply to save your changes back to the ZyWALL. Reset Click Reset to begin configuring this screen afresh. 16.3 The External DB Screen Click SECURITY > ANTI-SPAM > External DB to display the Anti-Spam External DB screen. Use this screen to enable or disable the use of the anti-spam external database. You can also configure the spam threshold and what to do when no valid spam score is received. You must register for this service before you can use it (see Chapter 6 on page 141 for details). 318 ZyWALL 5/35/70 Series User's Guide
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