Clarification regarding "Content Modify Subject"

[Mark Steudel]

I was wondering if someone could clarify for me the purpose for tagging the
subject line for "Content Modify Subject". My first idea is that this helps
keep up with new malicious code that has been updated to get around virus
filtering.

--- config in question ----
# If an attachment triggered a content check, but there was nothing
# else wrong with the message, do you want to modify the subject line?
# This makes filtering in Outlook very easy.
# This can also be the filename of a ruleset.
Content Modify Subject = yes

# This is the text to add to the start of the subject if the
# "Content Modify Subject" option is set.
# You might want to change this so your users can see at a glance
# whether it just was just the content that MailScanner rejected.
# This can also be the filename of a ruleset.
Content Subject Text = {Blocked Content}

I see this randomly and I'm not sure what is triggering it. Recently I got a
Outlook 2003 meeting request with a word document attached that triggered
it.

What could potentially happen if I turned this off?
What are the benefits to having this on?


Thanks, Mark