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4 Notices
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Spam Firewall > Using the email anti-spam interface in Plesk - Web Africa > Support KnowledgeBase
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Using the email anti-spam interface in Plesk
 The anti-spam settings are now available in Plesk under the Custom buttons section click Mail Spamfilter. Settings under here apply to all email accounts under this domain except where settings have been altered at the email address level below.   Settings can also be customised on a per mailbox level by scrolling to the bottom of the Mail Spamfilter page. These settings will over ride the domains settings for the specific mailbox. Spam Filter Sensitivity  The spam filter sensitivity can be adjusted to be more aggressive (closer to 1) or less sensitive (closer to 10). By default all domains are set to 5 which is the recommended setting. This number gives the firewall required cut off limit before email gets marked as spam. Each email is given a score based on the the contents of the mail headers and body. This score can be viewed by clicking on View and the Message Source in your email client or alternatively can be seen in the Message Log section and typically looks something like this : X-Spam-Status: No, score=-0.9 required=5.0 tests=BAYES_00,DNS_FROM_RFC_POST Grey Listing  This is the option to enable (ticked) or disable (unticked) greylisting for your domain or email account. Greylisting is a spam prevention method which greatly reduces the amount of viruses and spam received. How it works? Our mail servers initially, temporarily reject an email from an unrecognised mail server. The sending server will then retransmit the message as per standard email protocol. However, spammers generally will not because they send many emails quickly and not monitor those that fail. The combination of IP and e-mail addresses of the sender and receiver (the "triplet") are checked, if they have not previously been approved our servers send a "busy" message to the sending server. Note: Greylisting occurs prior to white and blacklisting. Black/White Listing  The black list address section lists all domains/emails, if any, that have been added to be blacklisted in future from receiving email. Use the Add button to create a blacklist address entry. Whitelisting works exactly the same as blacklisting however addresses listed under whitelisting are delivered regardless of their spam score. Mail List  The message log section allows you to view all messages that have gone through the firewall in the past 7 days for the domain. You can use the search fields and click search button to narrow down the results. The search results are displayed in a order of date received. They show all basic information about all email meeting the search criteria. By clicking on a message subject in the search results you can view the message source. Message details and the message source can be viewed once a search result is selected. To mark email as Ham, select the checkbox(es) next to the message(s) and click Mark Selected as Ham link above. This means the mail was incorrectly marked as spam and in future the firewall will be more lenient toward the details in this message. Marking a message as spam will do exactly that, so in future messages with these details will be scored more aggressively as spam. The process to be followed is the same as the marking messages as ham.
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