User guide

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Exchange Server 5.5 SP3 or SP4, the value will be
expressed in milliseconds and represents the period after
which the client will retry to access the file that had been
previously inaccessible due to scanning..
Q: How long can the list of file types be in one rule?
A: The file extensions list can contain a maximum of 255
characters in a single rule.
Q: I have enabled the Background scanning option in
VSAPI. Until now, messages on Microsoft Exchange
Server were always scanned after each virus signature
database update. This did not happen after the last
update. Where is the problem?
A: The decision to scan all messages immediately or at the
user's attempt to access a message depends on several
factors, including server load, CPU time required to scan
all messages in bulk and the total number of messages.
The Microsoft Exchange Server will scan every message
before it reaches the client’s inbox.
Q: Why did the rule counter increase by more than one
after receiving a single message?
A:The rules are checked against a message when it is
processed by transport agent (TA) or VSAPI. When both
TA and VSAPI are enabled and the message matches the
rule conditions, the rule counter may increase by 2 or
more. VSAPI accesses the parts of the message
individually (body, attachment) meaning the rules are
consequently applied to each part individually.
Furthermore, rules can be applied during a background
scan (e.g. repeated mailbox-store scan after a virus
signature database update), which can increase the rule
counter.
Q: Is ESET Mail Security 4 for Microsoft Exchange Server
compatible with Intelligent Message Filter?
A: Yes, ESET Mail Security 4 for Microsoft Exchange Server
(EMSX) is compatible with Intelligent Message Filter
(IMF). The processing of emails in this case is as follows:
- If ESET Mail Security Antispam has the Delete
message (or Quarantine message) option enabled
the action will be executed regardless of the action
set in Microsoft Exchange IMF.
- If ESET Mail Security Antispam has the Retain
message action set, the settings Microsoft Exchange
IMF will be used and the relevant action executed (e.
g. Delete, Reject, Archive...).
Q: How do I setup ESET Mail Security to move unsolicited
emails into the user-defined Microsoft Outlook spam
folder?
A: ESET Mail Security default settings cause Microsoft
Outlook to store unwanted email in the Junk E-mail
folder. To enable this functionality select the Write spam
score to the header of scanned email option (under F5 >
Antispam protection > Mail server protection >
Microsoft Exchange Server > Transport agent). If you
want the unwanted email to be stored in a different
folder, please read the following instructions:
1)
In ESET Mail Security:
- disable the Write spam score to the header
of scanned email option, ,
- enable the Retain message action for
messages marked as spam,
- define a text tag that will be added into
unwanted messages, e.g. "[SPAM]" (under Antispam
protection > Mail server protection > Alerts and
notifications).
2)
In Microsoft Outlook:
- setup a rule to ensure messages with a
specific text in the subject ("[SPAM]") will be moved into
the defined folder.
Q: In the antispam protection statistics many messages
fall into the Not scanned category. What email is not
scanned by the antispam protection?
A: The Not scanned category comprises of:
All messages that were scanned while the antispam
protection has been disabled.
All messages sent within the organization (all will
be scanned by antivirus protection )
All messages sent into the mailbox, that has the
AntispamBypass option enabled.
All messages from senders on the Safe Senders list.
All messages from servers on the Whitelist list (e.
g. MS Exchange IPAllow list or the Allowed IP
addresses).
Q: Users download messages to their email clients via
POP3 (bypassing Microsoft Exchange server), but the
mailboxes are stored on Microsoft Exchange Server. Will
these emails be subject to antivirus and antispam
scanning by ESET Mail Security?
A: In this type of configuration ESET Mail Security will
scan the emails stored on the Microsoft Exchange Server
only for the presence of viruses (via VSAPI). Antispam
scanning will not be realized as this requires an SMTP
server.