hmLoadTopic({
hmKeywords:"Black Lists,Block Lists,DNS,DNS Block Lists,DNS-BL,RBL,Real-time Block Lists",
hmTitle:"DNS Block Lists (DNS-BL)",
hmDescription:"DNS Block Lists (DNS-BL) can be used to help prevent spam email from reaching your users. This security feature allows you to specify several DNS block list services (which...",
hmPrevLink:"sf_options.html",
hmNextLink:"dns-bl_hosts.html",
hmParentLink:"security_menu.html",
hmBreadCrumbs:"<a href=\"security_menu.html\">Security Menu<\/a> &gt; Spam Filter",
hmTitlePath:"Security Menu > Spam Filter > DNS Block Lists (DNS-BL)",
hmHeader:"<h1 class=\"p_Heading1\" style=\"page-break-after: avoid;\"><span class=\"f_Heading1\">DNS Block Lists (DNS-BL)<\/span><\/h1>\n\r",
hmBody:"<p class=\"p_BodyText\"><span class=\"f_BodyText\">DNS Block Lists (DNS-BL) can be used to help prevent spam email from reaching your users. This security feature allows you to specify several DNS<\/span><span class=\"f_BodyText\"> block list services (which maintain lists of servers known to relay spam) that will be checked each time someone tries to send a message to your server. If the connecting IP has been<\/span><span class=\"f_BodyText\"> listed by any one of these services, the message(s) will be refused or flagged according to the settings on the <a href=\"dns-bl_options.html\" class=\"topiclink\">Settings<\/a> screen.<\/span><\/p>\n\r<p class=\"p_BodyText\"><span class=\"f_BodyText\">DNS<\/span><span class=\"f_BodyText\"> Block Lists includes<\/span><span class=\"f_BodyText\"> an Allow List for designating IP addresses that you wish to make exempt from DNS-BL queries. Before activating DNS-BL, you should make sure that your local IP address range is on the<\/span><span class=\"f_BodyText\"> Allow List to prevent lookups on those addresses. &quot;<\/span><span class=\"f_T_Code\">127.0.0.1<\/span><span class=\"f_BodyText\">&quot; is exempt and therefore doesn\'t need to be added to the list.<\/span><\/p>\n\r<p class=\"p_SeeAlso\" style=\"page-break-after: avoid; border-right: none; border-bottom: none; border-left: none;\"><span class=\"f_SeeAlso\">See:<\/span><\/p>\n\r<p class=\"p_SeeAlsoLinks\" style=\"page-break-after: avoid;\"><span class=\"f_SeeAlsoLinks\"><a href=\"dns-bl_hosts.html\" class=\"topiclink\">DNS-BL Hosts<\/a><\/span><\/p>\n\r<p class=\"p_SeeAlsoLinks\" style=\"page-break-after: avoid;\"><span class=\"f_SeeAlsoLinks\"><a href=\"dns-bl_options.html\" class=\"topiclink\">DNS-BL Settings<\/a><\/span><\/p>\n\r<p class=\"p_SeeAlsoLinks\" style=\"page-break-after: avoid;\"><span class=\"f_SeeAlsoLinks\"><a href=\"dns-bl_white_list.html\" class=\"topiclink\">DNS-BL Allow List<\/a><\/span><\/p>\n\r<p class=\"p_ControlHeading\" style=\"page-break-after: avoid;\"><span class=\"f_ControlHeading\">&nbsp;<\/span><\/p>\n\r"
})
