The antispam software works in conjunction with your mail server. The software identifies spam using a wide range of algorithms on e-mail headers and body text.
If you did not select this module to be included during the installation process, you must first install the module.
You can find this feature in the menu system at the following location:
The open source SpamAssassin solution is the antispam engine used in ClearOS Enterprise. This software automatically checks for base-only updates on a weekly basis. This is already included in ClearOS Enterprise for free!
In addition, the ClearSDN Antispam Updates service provides additional daily signature updates to improve the effectiveness of the antispam system. These signatures are compiled from third party organizations as well as internal engineering resources from ClearCenter. We keep tabs on the latest available updates and fine tune the system so you can focus on more important things.
If you want to discard spam before it reaches mailboxes, you can configure the mail discard policy. For example, you can discard spam marked with high probability (or higher) by using this tool.
A subject tag can be added to messages marked as spam. For instance a spam message with the subject “Premier Invest0r Rep0rt” will be transformed into “[SPAM] Premier Invest0r Rep0rt”. This feature makes it easy for end users to identify and filter spam.
Enabling Image Processing will improve the spam identification rate for spam messages containing images. Using OCR (Optical Character Recognition), antispam engine will convert images to text and perform analysis on the word content of the image.
The antispam engine includes both white and black lists. The white list is used to mark e-mail addresses that send non-spam, while the black list is used to mark e-mail addresses that are known spam. Entries should be listed one per line.
<note info>Among others, newsletters and legitimate e-commerce e-mail can sometimes be marked as spam. The e-mail addresses for these messages can be added to the white list to prevent the message from becoming marked as spam.</note>
E-mail addresses in the white and black lists can use the * wildcard character to match any characters. For instance, *@example.com and *.gov will mark all e-mail from the example.com and .gov domains.
You can improve the effectiveness of the antispam systems on your ClearOS system by identifying:
With a week or two of diligent training your system with these messages, you can expect to see a more effective antispam engine. There are two ways to train the antispam systems on your ClearOS system: webmail and mail-forwarding.
Training the antispam system via webmail is simple and more effective. In the Webmail interface, simply select the messages that you wish to process and press either the <button>Report as Spam</button> or <button>Report as Innocent</button> buttons. You will then be shown a confirmation message before the actual processing takes place.
Training via e-mail forwarding is not as effective since information is lost when you forward a message. If you decide to use this method, there are two e-mail addresses used for training:
In order to use this style of spam training, messages should be forwarded as an attachment. search?q=clearos%2C%20clearos%20content%2C%20Mail%20Anti-Spam%2C%20app-mail_antispam%2C%20clearos5%2C%20categoryserver%2C%20subcategorymailscanning%2C%20userguide%2C%20maintainer_dloper&btnI=lucky