F-SECURE ANTI-VIRUS - FOR MICROSOFT EXCHANGE Administrator's Manual page 157

Options
Limit max levels of
nested messages
Advanced
Administrator's
mailbox
Administration with Web Console
Trojans and other malicious code can disguise
themselves with filename extensions which are
usually considered safe to use. Intelligent File
Type Recognition can recognize the real file type
of the message attachment and use that while
the attachment is processed.
Using Intelligent File Type Recognition
strengthens the security, but can degrade the
system performance.
Specify how many levels deep to scan in nested
e-mail messages. A nested e-mail message is a
message that includes one or more e-mail
messages as attachments. If zero (0) is
specified, the maximum nesting level is not
limited.
Specify the primary SMTP address for the
account which is used to scan items in public
folders. The user account must have
permissions to access and modify items in the
public folders.
The setting is used on Microsoft Exchange 2010
platform only and affects manual, realtime, and
scheduled storage scanning. If you do not
specify any address, public folders in Exchange
Store cannot be accessed or even listed.
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