Anti-spam

Before anti-spam scanning starts, the addresses of the recipients and senders are analyzed against the black and white lists, which are specified on the Anti-spam section. Then the Anti-spam component checks the message.

The Anti-spam component analyzes the contents of messages and determines whether it is spam or not according to the spam-rate value summed up from various criteria. Depending on the analysis result, Anti-spam assigns an integer number to the message. A large number means that the message is likely to be spam. You can change the threshold value that is used to detect if the message is spam in Dr.Web CMS Web Console.

Anti-spam is configured in the Anti-spam section of the profile settings and it is available only with the "Anti-Virus&Anti-Spam" version of Dr.Web. If your key file supports the Anti-spam component then spam filtering should be enabled by default, i.e. the Enable Anti-spam check box at the top of the Anti-Spam pane should be selected.

To configure the settings of the Anti-spam component

1.Click Anti-spam in the Dr.Web Administrator Web Console console tree. The Anti-spam settings pane will open (see Figure 4).

Figure 4. Anti-spam settings pane

2.To disable spam filtering, clear the Enable anti-spam check box. Once the check box is cleared, all parameters become unavailable for editing. Select the check box to enable spam filtering.

3.In the Subject prefix field, you can change the prefix, which will be added to the subjects of email messages considered as spam. The default prefix is *** SPAM ***.

4.In the Email field, enter the email address you can specify the email address to redirect the spam messages.

5.In the fields below, you can define the program actions for three categories of messages based on the probability level of their being spam (Certainly spam, Probably spam or Unlikely spam). To do this, select one of the following actions for each category:

•Add prefix to subject. The prefix defined in the Subject prefix field will be added to the message subject.

•Skip. The message will be passed through to the recipient.

•Move to junk. The X-MS-Exchange-Organization-SCL header is added to the message, together with the message distrust index score. If the score is between 4 and 7, properly configured clients will move such message to the junk folder.

•Redirect. The message will be redirected to the address specified in the Email field.

•Block. Message sending will be blocked.

6.On the Black and white lists section, you can configure the use of the lists of trusted and distrusted addresses:

•Select Enable to enable the use of the lists. You can add email addresses you trust to the white list. In this case, messages from these addresses will not be checked for spam. If you add an address to the black list, all messages from it will be considered as Certainly spam.

•To add an address to the list, enter it in the Email field and click Add on the section of the white or black list. The address will be added to the selected list.

•To delete an address from the list, select it and click Remove on the section of the list this address is included in.

•You can also use the Export and Import buttons to save the list into a special file with .lst extension or to load the lists from the file and to create or edit the lists manually using a text editor, for example while creating and/or editing the files of black and white lists manually, you need to add prefix to the emails: "+" to add the email into the white list, "-" to add the email into the black list, e.g. +trusted_address@mail.com and -distrusted_address@mail.com. The created text file must be saved with .lst extension in Unicode format.

7.When you finish setting up the Anti-spam component, click Save.