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messages will be stored in the email server quarantine.
Please note that this is the server's managed quarantine
(not the client's quarantine or the quarantine mailbox).
Infected messages stored in mail server quarantine are
inaccessible until they are cleaned with the latest virus
signature database.
By activating Rescan, you can scan messages and files
that have already been scanned again.
4.2.4.4.2
Performance
In this section you can set the number of independent
scan threads used at a single time. More threads on
multiprocessor machines can increase the scan rate. For
the best program performance we advise using an equal
number of ThreatSense scan engines and scan threads.
TIp: To determine the Number of scan threads the
Microsoft Exchange Server provider recommends, use
the following formula:
[number of physical processors] x 2 + 1.
NOTE: Performance is not improved significantly if there
are more ThreatSense scanning engines than scanning
threads.
4.2.5
Transport Agent
In this section you can enable or disable antivirus and
antispyware protection by the transport agent. For
Microsoft Exchange Server 2007 and higher it is only
possible to install a transport agent if the server is in one
of two roles: Edge Transport or Hub Transport.
If the message cannot be cleaned, you can delete it, send
it to the quarantine mailbox or retain it.
If a threat is found, you can choose to write a spam score
to the scanned message and specify the value (in %).
Since botnets are responsible for sending the majority of
infected messages, the messages distributed this way are
to be categorized as spam. Write spam confidence level
(SCL) to scanned messages based on spam score
option (in Mail server protection > Microsoft Exchange
Server > Transport agent) must be enabled in order for
this feature to work effectively.
You can also choose to scan messages received from
authenticated sources or local servers.
4.3 Antispam settings
In the Mail server protection section you can enable spam
protection for the installed mail server, configure
antispam engine parameters and set other levels of
protection.
4.3.1
Antispam engine parameter setup
You can select a profile from a set of preconfigured
profiles (such the Recommended, Most accurate or
Fastest profiles). The list of profiles is loaded from the
Antispam module.
The Recommended profile is comprised of the
recommended settings, striking a balance between
security and impact on system performance.
The Most accurate profile is focused solely on mail server
security. This profile requires more system resources than
the Recommended profile.
The Fastest profile is preconfigured for a minimal usage
of system resources, achieved through the disabling of
some scanning features.
Custom > Open configuration file allows a user to edit
the spamcatcher.conf file. This option is recommended
for advanced users only.
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