ZyXEL Communications ZYWALL USG 2000 Support Notes page 171

ZyWALL USG 2000 Support Notes
First, we activate the function of anti-spam. Then, edit the content to choose which protocol
we want to scan and will scan all the incoming emails based on the list provided by DNSBL
website.
Here, we select "POP3" in the option of "protocol to scan." Then, choose the check DNSBL
checkbox in the option of "scan options."
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