Content filtering rules for multiple spaces are not triggered.

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Article ID: 226002

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Updated On:

Products

Messaging Gateway

Issue/Introduction

Content filtering rules for multiple spaces in message header or body are not triggered. Even though the message or header contains the matching string or regex.

Cause

Before any content rules are applied, the message content goes through a normalization process - mostly this just involves decoding any encoded content, 
but it also involves compressing all consecutive white-space characters to a single space character - this is why it's impossible to filter on embedded newlines, 
or tabs, in a message - these are normalized into a normal space character (ascii 0x20). 

This normalization happens on both the message body and the message headers. 
It also applies to attachment content, for those attachments that contain extractable text.

Environment

Symantec Messaging Gateway (SMG) 10.7.4

Resolution

Enhancement request has been taken by the product engineering team.

Initial tentative target is SMG 10.7.6.

Proposed Draft Enhancement: Update the policy engine to enable a new search element "raw header" or "raw content".