hmLoadTopic({
hmKeywords:"Dynamic Screening,Dynamic Screening SMTP Screen,Screening,Screening SMTP,Security,Security SMTP Screen,SMTP Screen",
hmTitle:"SMTP Screen",
hmDescription:"Using the SMTP Screen you can block IP addresses that connect to MDaemon too many times within a specified number of minutes. You can also block those the cause too many failed...",
hmPrevLink:"security--host_screening.html",
hmNextLink:"security--hijack_detection.html",
hmParentLink:"security_menu.html",
hmBreadCrumbs:"<a href=\"security_menu.html\">Security Menu<\/a> &gt; Security Manager &gt; Screening",
hmTitlePath:"Security Menu > Security Manager > Screening > SMTP Screen",
hmHeader:"<h1 class=\"p_Heading1\" style=\"page-break-after: avoid;\"><span class=\"f_Heading1\">SMTP Screen<\/span><\/h1>\n\r",
hmBody:"<p class=\"p_BodyText_Center\"><img style=\"margin:0 auto 0 auto;width:32.5625rem;height:26.9375rem;border:none\" src=\".\/images\/screening_smtp-screen.png\"\/><\/p>\n\r<p class=\"p_BodyText\"><span class=\"f_BodyText\">Using the SMTP Screen you can block IP addresses that connect to MDaemon too many times within a specified number of minutes. You can also block those the cause too many failed RCPTs, and those that send too many RSET commands. The SMTP Screen requires Dynamic Screening and uses the<\/span><span class=\"f_BodyText\"> <a href=\"dynamic-screening_dynamic-blacklist.html\" class=\"topiclink\">Dynamic Block List<\/a> and <a href=\"dynamic-screening_dynamic-whitelist.html\" class=\"topiclink\">Dynamic Allow List<\/a>.<\/span><\/p>\n\r<p class=\"p_ControlHeading\" style=\"page-break-after: avoid;\"><span class=\"f_ControlHeading\">Block IPs that connect more than [X] times in [X] minutes<\/span><\/p>\n\r<p class=\"p_ControlIndent\"><span class=\"f_ControlIndent\">Click this check box if you wish to temporarily block IP addresses that connect to your server an excessive number of times in a limited time period. Specify the number of minutes and the number of connections allowed in that period. The addresses are blocked for the amount of time specified on the <a href=\"dynamic-screening_auth-failure-tracking.html\" class=\"topiclink\">Auth Failure Tracking<\/a> screen. This option also applies to POP and IMAP connections.<\/span><\/p>\n\r<p class=\"p_ControlHeading\" style=\"page-break-after: avoid;\"><span class=\"f_ControlHeading\">Block IPs that cause this many failed RCPTs<\/span><\/p>\n\r<p class=\"p_ControlIndent\"><span class=\"f_ControlIndent\">When an IP address causes this number of &quot;Recipient unknown&quot; errors during a mail session it will be automatically blocked for the amount of time specified on the <a href=\"dynamic-screening_auth-failure-tracking.html\" class=\"topiclink\">Auth Failure Tracking<\/a> screen. Frequent &quot;Recipient unknown&quot; errors are often a clue that the sender is a spammer, since spammers commonly attempt to send messages to outdated or incorrect addresses.<\/span><\/p>\n\r<p class=\"p_ControlHeading\" style=\"page-break-after: avoid;\"><span class=\"f_ControlHeading\">Block IPs that send this many RSETs (0 = no limit)<\/span><\/p>\n\r<p class=\"p_ControlIndent\"><span class=\"f_ControlIndent\">Use this option if you wish to block any IP address that issues the designated number of RSET commands during a single mail session. Use &quot;0&quot; if you do not wish to set a limit. There is a similar option on the <a href=\"default-domain-and-servers_servers.html\" class=\"topiclink\">Servers<\/a> screen under Server Settings that can be used to set a hard limit on the allowed number of RSET commands. A blocked IP address will be blocked for the amount of time specified on the <a href=\"dynamic-screening_auth-failure-tracking.html\" class=\"topiclink\">Auth Failure Tracking<\/a> screen. <\/span><\/p>\n\r<p class=\"p_ControlHeading\" style=\"page-break-after: avoid;\"><span class=\"f_ControlHeading\">Close SMTP session after blocking IP<\/span><\/p>\n\r<p class=\"p_ControlIndent\"><span class=\"f_ControlIndent\">Enabling this option causes MDaemon to close the SMTP session after the IP address is blocked. This is enabled by default.<\/span><\/p>\n\r<p class=\"p_ControlHeading\" style=\"page-break-after: avoid;\"><span class=\"f_ControlHeading\">Do not block IP when when SMTP authentication is used<\/span><\/p>\n\r<p class=\"p_ControlIndent\"><span class=\"f_ControlIndent\">Click this checkbox if you want senders who authenticate their mail sessions before sending to be exempt from Dynamic Screening. This is enabled by default.<\/span><\/p>\n\r<p class=\"p_ControlHeading\" style=\"page-break-after: avoid;\"><span class=\"f_ControlHeading\">Send notification when IP is blocked<\/span><\/p>\n\r<p class=\"p_ControlIndent\"><span class=\"f_ControlIndent\">By default, when an IP addresses is automatically blocked by the Dynamic Screening system, the Dynamic Screening <\/span><span class=\"f_ControlIndent\" style=\"font-style: italic;\"><a href=\"dynamic-screening_notifications.html\" class=\"topiclink\">IP Address Blocking Reports<\/a><\/span><span class=\"f_ControlIndent\"> options will be used to notify you of that action. Clear this checkbox if you do not wish to be notified when an IP address is blocked due to SMTP Screening feature.<\/span><\/p>\n\r<p class=\"p_ControlHeading\" style=\"page-break-after: avoid;\"><span class=\"f_ControlHeading\">Allow list<\/span><\/p>\n\r<p class=\"p_ControlIndent\"><span class=\"f_ControlIndent\">Click this button to open the<\/span><span class=\"f_ControlIndent\"> <a href=\"dynamic-screening_dynamic-whitelist.html\" class=\"topiclink\">Dynamic Allow List<\/a>. IP addresses listed there are exempt from SMTP Screening.<\/span><\/p>\n\r<p class=\"p_ControlHeading\" style=\"page-break-after: avoid;\"><span class=\"f_ControlHeading\">Advanced<\/span><\/p>\n\r<p class=\"p_ControlIndent\"><span class=\"f_ControlIndent\">This button opens the <a href=\"dynamic-screening_options.html\" class=\"topiclink\">Dynamic Screening<\/a> dialog.<\/span><\/p>\n\r"
})
