Anti-Spam settings

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With the help of the Anti-Spam module, you can protect your company mailboxes against unsolicited email messages.

The Anti-Spam module scans incoming messages from external addresses. Scanning of incoming and outgoing messages from internal addresses is available when Scan internal messages for spam option is enabled.

Anti-Spam scans the message header, contents, attachments, design elements, and other message attributes. While performing the scan, Anti-Spam uses linguistic and heuristic algorithms that involve comparing the message being scanned with sample messages stored in anti-spam databases, as well as additional cloud services such as Kaspersky Security Network.

When creating a security policy, you can specify the Anti-Spam settings.

Actions to be taken by the application

In the Action area, specify what the application must do with messages in which it detects spam:

• Move to Junk Email folder

  The message is moved from its original folder to the Junk Email folder.

• Allow through

  The message remains unchanged in the user mailbox.

• Tag the subject

  You can add a custom tag to the subjects of affected messages. If necessary, change the tag in the entry field under the Tag the subject check box.

• Delete permanently: deleted messages cannot be recovered

  To view this option, you must open the Other options drop-down list. The whole message is deleted from the user mailbox beyond recovery.

Allowlist

In the Allowlist area, consider whether to scan internal messages and configure allowed senders:

• Scan internal messages for spam

  This option allows you to scan incoming and outgoing internal messages for spam. This option is disabled by default.

  To enable scanning of internal messages:

  1. Select the Scan internal messages for spam check box.
  2. Click Save.

  All internal messages will be scanned for spam.

  Messages from allowed senders will not be scanned.

• Allow messages from the following senders

  This option allows you to configure allowed senders. These senders are considered trusted and messages from them are skipped from processing.

  To configure allowed senders:

  1. Select the Allow messages from the following senders check box.
  2. Click the Select button.

     The Sender allowlist window opens.

  3. Click the Add sender button.

     The Add a sender to the allowlist window opens.

  4. In the Specify a complete email address or a mask entry field, provide an email address or several email addresses that should be added to the allowlist separated by semicolons or line breaks.

     If you want to allow several senders at once, you can use masks. For instance, if you specify the *@example.com mask, the allowlist contains all email addresses from the @example.com domain. You can also copy and paste a list of email addresses / masks separated by semicolons or line breaks in the entry field.

     Representation of a file name using wildcards. The standard wildcards used in file masks are * and ?, where * represents any number of any characters and ? stands for any single character.

  5. Click Validate.

     The provided email addresses / masks are displayed in the list.

     If the email addresses / masks are entered incorrectly, they are displayed in the list in a red font, and you must introduce changes to save them.

  6. Click Save to save the list of provided addresses / masks.
  7. If you want to delete an email address / mask from the list:
     1. Click the Delete () button next to the email address / mask.
     2. Click Save.

New messages from an allowed sender that Kaspersky Security for Microsoft Office 365 identifies as spam remain in the Inbox folder. New messages from an allowed sender that Kaspersky Security for Microsoft Office 365 detects in the Junk Email folder are automatically moved to the Inbox folder.