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| [[Category:Applications]]
| | Spam Blocker Lite has been removed as of version 17.4. |
| <span style="display:none" class="helpSource spam_blocker_lite">Spam_Blocker_Lite</span>
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| <span style="display:none" class="helpSource spam_blocker_lite_status">Spam_Blocker_Lite#Status</span>
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| <span style="display:none" class="helpSource spam_blocker_lite_email">Spam_Blocker_Lite#Email</span>
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| <span style="display:none" class="helpSource spam_blocker_lite_event_log">Spam_Blocker_Lite#Event_Log</span>
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| <span style="display:none" class="helpSource spam_blocker_lite_tarpit_event_log">Spam_Blocker_Lite#Tarpit_Event_Log</span>
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| {| width='100%'
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| | align="center" | [[Image:SpamBlockerLite.png|128px]] '''Spam Blocker Lite'''
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| | align="center" |
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| {|
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| | Other Links:
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| |[http://www.untangle.com/store/spam-blocker-lite.html Spam Blocker Lite Description Page]
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| |[http://demo.untangle.com/admin/index.do#apps/1/spam-blocker-lite Spam Blocker Lite Demo]
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| |[http://forums.untangle.com/spam-blocker-lite/ Spam Blocker Lite Forums]
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| |[[Spam Blocker Lite Reports]]
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| |[[Spam Blocker Lite FAQs]]
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| |}
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| |}
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| <br/>
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| ----
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| == About Spam Blocker Lite ==
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| Spam Blocker Lite is an intelligent email filter that identifies spam (unsolicited bulk email). It leverages technology from the [http://spamassassin.apache.org/ SpamAssassin] project. It can scan any email that is transported via [http://en.wikipedia.org/wiki/SMTP SMTP].
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| Spam Blocker Lite transparently scans email transported over SMTP on the way to your mail server (or outbound if configured so). It does not require any reconfiguration of DNS MX records or any email servers. Any SMTP traffic going through the NG Firewall server will be scanned.
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| == Settings ==
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| This section reviews the different settings and configuration options available for Spam Blocker Lite.
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| === Status ===
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| This displays the current status and some statistics.
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| {{AppScreenshot|spam-blocker-lite|status}}
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| === Email ===
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| These settings apply only to the SMTP protocol.
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| * '''Scan SMTP''': This enables or disables SMTP scanning.
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| * '''Strength''': If the Spam Score of a message is equal to or greater than this setting your chosen action will be taken on the message. Higher values make Spam Blocker ''more'' sensitive to spam. For more information, see [[#What should I set for strength? | What should I set for strength?]] in the FAQs below.
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| * '''Action''': The action taken on the message if the Spam Score is high enough.
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| :If set to '''Mark''', "[Spam]..." will be prepended to the email subject line and it will be delivered. If set to '''Pass''', the message will be delivered as originally sent. '''Drop''' will inform the sending server the mail was successfully delivered, but NG Firewall will drop the mail so it is never delivered. '''Quarantine''' will send the mail to users' email quarantine for them to release or delete as they see fit. For more information, refer to [[Quarantine]].
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| * '''Drop Super Spam''': If this option is enabled, any emails with a score greater than the Super spam score will be dropped.
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| * '''Super Spam Score''': The score emails must reach to be dropped as Super Spam.
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| * '''Advanced SMTP Configuration''':
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| :'''IMPORTANT: The default values are the suggested values. Changing and customizing settings can easily and will likely cause Spam Blocker to perform less than optimally.'''
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| :* '''Enable tarpitting''': This option enables Tarpit. If enabled, when an SMTP session is first caught Spam Blocker will check if the client IP is on a [http://en.wikipedia.org/wiki/DNSBL DNSBL]. If it is, the session is rejected before the remote server is even allowed to send the email. This increases the capacity of a given server by quite a bit and can also save bandwidth, but it can increase false positives if the remote email server has mistakenly been put on a blacklist. '''This setting will not increase spam scanning accuracy - it will actually decrease it as it will prevent valuable super-spam training data from reaching the spam engine.''' By enabling this feature you are getting lower spam accuracy, but increased email scanning capacity.
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| :* '''Add email headers''': When enabled, NG Firewall adds information about the Spam Score and the test run to get that score to the headers of the message.
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| :* '''Close connection on scan failure''': This option will close the connection if the scan fails so the message will be resent and retested. If disabled, a scan failure will allow the email to be delivered without being scanned.
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| :* '''Scan outbound (WAN) SMTP''': If unchecked, outbound mail (mail in sessions going out a WAN interface) will not be scanned. If checked, outbound mail will be scanned just like incoming mail.
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| :* '''Allow and ignore TLS sessions''': This option controls the allowance of TLS sessions. If unchecked (the default) the TLS advertisement (if present) is removed from the server advertisements and TLS is not allowed on any scanned sessions. If checked, the TLS advertisement is allowed and if the client initialized TLS the message will pass through completely unscanned, even if it is spam.
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| :* '''CPU Load Limit''': If your CPU Load exceeds this number incoming connections are stopped until the load decreases. This is specified so that spam scanning can not monopolize the server resources.
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| :* '''Concurrent Scan Limit''': This is the maximum number of messages that can be scanned at the same time. This is specified so that spam scanning can not monopolize the server resources.
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| :* '''Message Size Limit''': This option allows you to change the maximum size of a message that will be scanned for spam. The default maximum size is 256KB. Spam will typically be much smaller, as spammers rely on the sheer number of messages sent. '''NOTE: this does not control the message size limit of messages passed through NG Firewall. This does not effect the maximum size of message your server will accept, only the limit on the size of message that will be checked for spam.'''
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| {{AppScreenshot|spam-blocker-lite|email}}
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| == Reports ==
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| {{:Spam Blocker Lite Reports}}
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| == Related Topics ==
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| * [[Spam Blocker]]
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| == Spam Blocker Lite FAQs ==
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| {{:Spam Blocker Common FAQs}}
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