About information X-headers

Based on the results of the scan, the application appends special information X-headers to the header of the message, for example:

Based on the results of the scan by the Anti-Virus module, the application adds the X-KSMG-AntiVirus-Status information header to the MIME part of the message has one of the following statuses: Infected, Error, or Encrypted.

Based on the results of the Anti-Spam scan, the application can add to the message the X-MS-Exchange-Organization-SCL information header containing the SCL rating. You can manage the addition of information X-headers to messages. For example, you can disable the addition of KSMG information X-headers to the headers of messages that are sent outside the organization to prevent disclosing the presence of KSMG in the infrastructure.

KSMG allows configuring the modification or removal of message headers. For example, by removing headers you can hide the path that the message takes between mail servers of your organization, whereas adding a header can be used for subsequent message processing by another system.

You can configure the removal or addition of headers in the following cases:

All actions on headers are performed only for those messages that will be delivered to recipients, based on the results of scanning by application modules.

KSMG applies the configured actions to headers in the following order:

  1. Adding information headers based on message scan results.
  2. Removing the specified headers in the following order: headers removed when a processing rule is triggered → headers removed when a Content Filtering expression is triggered.

    In case of a Content Filtering error, the order of header removal is as follows: headers removed when a processing rule is triggered → headers removed when a Content Filtering error occurs.

  3. Modifying the specified headers in the following order: headers modified when a processing rule is triggered → headers modified when a Content Filtering expression is triggered.

    In case of a Content Filtering error, the order of header modification is as follows: headers modified when a processing rule is triggered → headers modified when a Content Filtering error occurs.

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