AVG 9.0 EMAIL SERVER EDITION - V 90.4 User manual

AVG Email Server Edition 2012
User Manual
Document revision 2012.05 (2/28/2012)
C opyright AVG Technologies C Z, s.r.o. All rights reserved.
All other trademarks are the property of their respective owners.
This product uses RSA Data Security, Inc. MD5 Message-Digest Algorithm, C opyright (C ) 1991-1992, RSA Data
Security, Inc. C reated 1991.
This product uses code from C -SaC zech library, C opyright (c) 1996-2001 Jaromir Dolecek
(dolecek@ics.muni.cz).
This product uses compression library zlib, C opyright (c) 1995-2002 Jean-loup Gailly and Mark Adler.
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Contents
........................................................................................................................ 4
1. Introduction
........................................................................................................................
5
2. AVG
Installation Requirements
5
2.1 Operation..........................................................................................................
Systems Supported
..........................................................................................................
5
2.2 Email Servers
Supported
5
2.3 Hardware..........................................................................................................
Requirements
5
2.4 Uninstall ..........................................................................................................
Previous Versions
..........................................................................................................
6
2.5 MS Exchange
Service Packs
........................................................................................................................
7
3. AVG
Installation Process
..........................................................................................................
7
3.1 Installation
Launch
8
3.2 Activate ..........................................................................................................
Your License
..........................................................................................................
9
3.3 Select Installation
Type
10
3.4 Custom..........................................................................................................
Install - Custom Options
..........................................................................................................
12
3.5 Installation
Completion
........................................................................................................................
13
4. E-mail
Scanner for MS Exchange Server 2007/2010
.......................................................................................................... 13
4.1 Overview
..........................................................................................................
16
4.2 E-mail Scanner
for MS Exchange (routing TA)
..........................................................................................................
17
4.3 E-mail Scanner
for MS Exchange (SMTP TA)
..........................................................................................................
18
4.4 E-mail Scanner
for MS Exchange (VSAPI)
..........................................................................................................
21
4.5 Detection
Actions
.......................................................................................................... 22
4.6 Mail Filtering
........................................................................................................................
23
5. E-mail
Scanner for MS Exchange Server 2003
.......................................................................................................... 23
5.1 Overview
..........................................................................................................
26
5.2 E-mail Scanner
for MS Exchange (VSAPI)
..........................................................................................................
29
5.3 Detection
Actions
.......................................................................................................... 30
5.4 Mail Filtering
........................................................................................................................
31
6. AVG
for Kerio MailServer
.......................................................................................................... 31
6.1 Configuration
........................................................................................................................
35
7. Anti-Spam
Configuration
..........................................................................................................
35
7.1 Anti-Spam
Principles
..........................................................................................................
35
7.2 Anti-Spam
Interface
..........................................................................................................
37
7.3 Anti-Spam
Settings
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.......................................................................................................... 41
7.4 Performance
.......................................................................................................... 42
7.5 RBL
7.6 Whitelist.......................................................................................................... 43
7.7 Blacklist.......................................................................................................... 44
.......................................................................................................... 45
7.8 Expert Settings
........................................................................................................................
46
8. AVG
Settings Manager
........................................................................................................................
49
9. FAQ
and Technical Support
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1. Introduction
This user manual provides comprehensive documentation for AVG Email Server Edition 2012.
Congratulations on your purchase of AVG Email Server Edition 2012!
AVG Email Server Edition 2012 is one of a range of award winning AVG products designed to
provide you with peace of mind and total security for your server. As with all AVG products AVG
Email Server Edition 2012 has been completely re-designed, from the ground up, to deliver AVG’s
renowned and accredited security protection in a new, more user friendly and efficient way.
AVG has been designed and developed to protect your computing and networking activity. Enjoy the
experience of full protection from AVG.
Note: This documentation contains description of specific E-mail Server Edition features. Should
you require information about other AVG features, please consult the user guide to Internet Security
edition, which contains all the necessary details. You can download the guide from the http://www.
avg.com.
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2. AVG Installation Requirements
2.1. Operation Systems Supported
AVG Email Server Edition 2012 is intended to protect e-mail servers running under the following
operating systems:
Windows 2008 Server Edition (x86 and x64)
Windows 2003 Server (x86, x64) SP1
2.2. Email Servers Supported
The following e-mail servers are supported:
MS Exchange 2003 Server version
MS Exchange 2007 Server version
MS Exchange 2010 Server version
Kerio MailServer – version 6.7.2 and higher
2.3. Hardware Requirements
Minimum hardware requirements for AVG Email Server Edition 2012 are:
Intel Pentium CPU 1.5 GHz
500 MB of free hard drive space (for installation purposes)
512 MB of RAM memory
Recommended hardware requirements for AVG Email Server Edition 2012 are:
Intel Pentium CPU 1.8 GHz
600 MB of free hard drive space (for installation purposes)
512 MB of RAM memory
2.4. Uninstall Previous Versions
If you have an older version of AVG Email Server installed, you will need to uninstall it manually
before installing AVG Email Server Edition 2012. You must manually perform the uninstallation of
the previous version, using the standard windows functionality.
From the start menu Start/Settings/Control Panel/Add or Remove Programs select the
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correct program from the list of installed software (or you can do this maybe even easier via
menu Start/All Programs/AVG/Uninstall AVG).
If you have previously used the AVG 8.x or older version, do not forget to uninstall also
individual server plug-ins.
Note: It will be necessary to restart the store service during the uninstallation process.
Exchange plug-in - run setupes.exe with the /uninstall parameter from the folder where the
plug-in was installed.
e.g. C:\AVG4ES2K\setupes.exe /uninstall
Lotus Domino/Notes plug-in - run setupln.exe with the /uninstall parameter from folder
where the plug-in was installed:
e.g. C:\AVG4LN\setupln.exe /uninstall
2.5. MS Exchange Service Packs
There is no service pack required for MS Exchange 2003 Server; however, it is recommended to
keep your system as up to date with the latest service packs and hotfixes as possible in order to
obtain maximal available security.
Service Pack for MS Exchange 2003 Server (optional):
http://www.microsoft.com/exchange/evaluation/sp2/overview.mspx
At the beginning of the setup, all system libraries versions will be examined. If it is necessary to
install newer libraries, the installer will rename the old ones with a .delete extension. They will be
deleted after the system restart.
Service Pack for MS Exchange 2007 Server (optional):
http://www.microsoft.com/downloads/details.aspx?FamilyID=44c66ad6-f185-4a1d-a9ab473c1188954c&displaylang=en
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3. AVG Installation Process
To install AVG on your computer, you need to get the latest installation file. You can use the
installation file from the CD that is a part of your box edition but this file might be out-of-date.
Therefore we recommended getting the latest installation file online. You can download the file from
the AVG website (at http://www.avg.com/download?prd=msw)
Note: There are two installation pack ages available for your product - for 32bit operating systems
(mark ed as x86) and for 64bit operating systems (mark ed as x64). Be sure to use the correct
installation pack age for your specific operating system.
During the installation process you will be asked for your license number. Please make sure you
have it available before starting the installation. The number can be found in the CD packaging. If you
purchased your copy of AVG on-line, your license number will have been delivered to you via e-mail.
Once you have downloaded and saved the installation file on your hard drive, you can launch the
installation process. The installation is a sequence of dialog windows with a brief description of what
do at each step. In the following, we offer an explanation for each dialog window:
3.1. Installation Launch
The installation process starts with the Welcome window. In here you select the language used for
the installation process and read the license conditions. Use the Printable version button to open
the license text in a new window. Press the Accept button to confirm and continue to the next
dialog.
Attention: You will be able to choose also additional languages for the application interface later
during the installation process.
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3.2. Activate Your License
In the Activate your License dialog you have to fill in your license number.
Enter your license number into the License Number text field. The license number will be in the
confirmation e-mail that you received after purchasing your AVG on-line. You must type in the
number exactly as shown. If the digital form of the license number is available (in the email), it is
recommended to use the copy and paste method to insert it.
Press the Next button to continue the installation process.
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3.3. Select Installation Type
The Select type of Installation dialog offers the choice of two installation options: Quick Install and
Custom Install.
For most users, it is highly recommended to keep to the Quick Install that installs AVG in fully
automatic mode with settings predefined by the program vendor. This configuration provides
maximum security combined with the optimal use of resources. In the future, if the need arises to
change the configuration, you will always have the possibility to do so directly in the AVG
application.
Custom Install should only be used by experienced users who have a valid reason to install AVG
with non-standard settings. E.g. to fit specific system requirements.
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3.4. Custom Install - Custom Options
The Destination folder dialog allows you to specify the location where AVG should be installed. By
default, AVG will be installed to the program files folder located on drive C:. If you want to change
this location, use the Browse button to display the drive structure, and select the respective folder.
The Component selection section displays an overview of all AVG components that can be
installed. If the default settings do not suit you, you can remove/add specific components.
However, you can only select from components that are included in your purchased AVG
edition. Only those components will be offered to be installed within the Component
Selection dialog!
AVG Remote Admin Client - if you intend to connect AVG to an AVG DataCenter (AVG
Network Editions), then you need to select this option.
Settings Manager - a tool suitable mainly for network administrators that allows you to copy,
edit and distribute AVG configuration. The configuration can be saved to a portable device
(USB flash drive etc.) and then applied manually or any other way to chosen stations.
Additional Installed Languages - you can define which language(s) AVG should be installed
in. Check the Additional installed languages item and then select the desired languages
from the respective menu.
Basic overview of the individual server components (Server Addins):
Anti-Spam Server for MS Exchange
Checks all incoming e-mail messages and marks unwanted e-mails as SPAM. It uses several
analyzing methods to process each e-mail message, offering maximum possible protection
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against unwanted e-mail messages.
E-mail Scanner for MS Exchange (routing Transport Agent)
Checks all incoming, outgoing and internal e-mail messages going through the MS Exchange
HUB role.
Available for MS Exchange 2007/2010 and can be installed for HUB role only.
E-mail Scanner for MS Exchange (SMTP Transport Agent)
Checks all e-mail messages coming through the MS Exchange SMTP interface.
Available for MS Exchange 2007/2010 only and can be installed for both EDGE and HUB
roles.
E-mail Scanner for MS Exchange (VSAPI)
Checks all e-mail messages stored in user mailboxes. If any viruses are detected, they are
moved to the Virus Vault, or completely removed.
Note: There are different options available for different versions of MS Exchange.
Continue by pressing the Next button.
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3.5. Installation Completion
If you selected the Remote Administration Component module during module selection, then the
final screen will allow you to define the connection string for connecting to your AVG DataCenter.
This dialog also allows you to decide whether you want to participate in the Product Improvement
Program that collects anonymous information on detected threats in order to increase the overall
Internet security level. If you agree with this statement, please keep the I agree to participate in the
AVG 2012 web safety and Product Improvement Program ... option checked (the option is
confirmed, by default).
Confirm your choices by clicking the Finish button.
AVG is now installed on your computer and fully functional. The program is running in the
background in fully automatic mode.
To individually setup protection for your e-mail server, follow the appropriate chapter:
E-mail Scanner for MS Exchange Server 2007/2010
E-mail Scanner for MS Exchange Server 2003
AVG for Kerio MailServer
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4. E-mail Scanner for MS Exchange Server 2007/2010
4.1. Overview
The AVG for MS Exchange Server 2007/2010 configuration options are fully integrated within the
AVG Email Server Edition 2012 as server components.
Basic overview of the individual server components:
Anti-Spam - Anti-Spam Server for MS Exchange
Checks all incoming e-mail messages and marks unwanted e-mails as SPAM. It uses several
analyzing methods to process each e-mail message, offering maximum possible protection
against unwanted e-mail messages.
EMS (routing) - E-mail Scanner for MS Exchange (routing Transport Agent)
Checks all incoming, outgoing and internal e-mail messages going through the MS Exchange
HUB role.
Available for MS Exchange 2007/2010 and can be installed for HUB role only.
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EMS (SMTP) - E-mail Scanner for MS Exchange (SMTP Transport Agent)
Checks all e-mail messages coming through the MS Exchange SMTP interface.
Available for MS Exchange 2007/2010 only and can be installed for both EDGE and HUB
roles.
EMS (VSAPI) - E-mail Scanner for MS Exchange (VSAPI)
Checks all e-mail messages stored in user mailboxes. If any viruses are detected, they are
moved to the Virus Vault, or completely removed.
Important note: If you decided to install and use VSAPI in combination with routing Transport
agent on a Hub Exchange role, your e-mail messages will be scanned twice. To avoid this, please
check the Do not scan outgoing messages (MS Exchange 2007/2010) box in VSAPI settings
(click here to learn more).
Click a required component icon to open its interface. With the exception of Anti-Spam, all the
components share the following common control buttons and links:
Scan Results
Opens a new dialog where you can review scan results:
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Here you can check messages divided into several tabs according to their severity. See
configuration of individual components for amending the severity and reporting.
By default there are displayed only results for the last two days. You can change the
displayed period by amending the following options:
o
Show last - insert preferred days and hours.
o
Show selection - choose a custom time and date interval.
o
Show all - Displays results for the whole time period.
Use Refresh button to reload the results.
Refresh statistical values - updates stats displayed above.
Reset statistical values - resets all the stats to zero.
The working buttons are as follows:
Settings - use this button to open settings of the component.
Back - press this button to return to the Server components overview.
You will find more information on individual settings of all components in the chapters below.
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4.2. E-mail Scanner for MS Exchange (routing TA)
To open the settings of E-mail Scanner for MS Exchange (routing transport agent), select the
Settings button from the interface of the component.
From the Server components list select the E-mail Scanner for MS Exchange (routing TA) item:
The Basic Settings section contains the following options:
Enable component - uncheck to disable the whole component.
Language - select preferred component language.
Certify messages - check this if you wish to add a certification note to all scanned
messages. You can customize the message in the next field.
The Logging settings section:
Log file size - choose a preferred size of the log file. Default value: 100 MB.
The Scanning properties section:
Use Heuristics - check this box to enable heuristic analysis method during scanning.
Report Potentially Unwanted Programs and Spyware threats - check this option to report
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the presence of potentially unwanted programs and spyware.
Report enhanced set of Potentially Unwanted Programs - check to detect extended
package of spyware: programs that are perfectly ok and harmless when acquired from the
manufacturer directly, but can be misused for malicious purposes later, or programs that
always harmless but might be unwanted (various toolbars etc.). This is an additional measure
that increases your computer security and comfort even more, however it can possibly block
legal programs, and is therefore switched off by default. Note: This detection feature is
additional to the previous option, so if you want protection from the basic types of spyware,
always keep the previous box checked.
Scan inside archives - check this option to let the scanner look also inside archived files
(zip, rar, etc.)
The E-mail attachments reporting section allows you to choose which items should be reported
during scanning. If checked, each e-mail with such an item will contain [INFORMATION] tag in the
message subject. This is the default configuration which can be easily amended in the Detection
actions section, part Information (see below).
The following options are available:
Report password protected archives
Report password protected documents
Report files containing macro
Report hidden extensions
There are also these sub-items available in the following tree structure:
Detection actions
Mail filtering
4.3. E-mail Scanner for MS Exchange (SMTP TA)
The configuration for the E-mail Scanner for MS Exchange (SMTP Transport Agent) is exactly
the same as in the case of routing transport agent. For more information please see the E-mail
Scanner for MS Exchange (routing TA) chapter above.
There are also these sub-items available in the following tree structure:
Detection actions
Mail filtering
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4.4. E-mail Scanner for MS Exchange (VSAPI)
This item contains settings of the E-mail Scanner for MS Exchange (VSAPI).
The Basic Settings section contains the following options:
Enable component - uncheck to disable the whole component.
Language - select preferred component language.
The Logging settings section:
Log file size - choose a preferred size of the log file. Default value: 100 MB.
The Scan settings section:
Background Scan - you can enable or disable the background scanning process here.
Background scanning is one of the features of the VSAPI 2.0/2.5 application interface. It
provides threaded scanning of the Exchange Messaging Databases. Whenever an item that
has not been scanned with the latest AVG virus base update is encountered in the users’
mailbox folders, it is submitted to AVG for Exchange Server to be scanned. Scanning and
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searching for the not examined objects runs in parallel.
A specific low priority thread is used for each database, which guarantees other tasks (e.g. email messages storage in the Microsoft Exchange database) are always carried out
preferentially.
Proactive Scan (incoming messages)
You can enable or disable the proactive scanning function of VSAPI 2.0/2.5 here. This
scanning occurs when an item is delivered to a folder, but a request has not been made by a
client.
As soon as messages are submitted to the Exchange store, they enter the global scanning
queue as low priority (maximum of 30 items). They are scanned on the first in, first out (FIFO)
basis. If an item is accessed while still in the queue, it is changed to high priority.
Note: Overflow messages will continue to the store unscanned.
Note: Even if you disable both Background Scan and Proactive Scan options, the on access
scanner will be still active when an user will try to download a message with the MS Outlook client.
Scan RTF - you can specify here, whether the RTF file type should be scanned or not.
Do not scan outgoing messages (MS Exchange 2007/2010) - with both VSAPI and Routing
Transport Agent (routing TA) server components installed (it doesn’t matter if it’s on one single
server, or two different ones), it may occur that outgoing mail is scanned twice. The first scan
is done by VSAPI On-access scanner, while the second one by the Routing Transport Agent.
This might cause certain server slowdowns and moderate delays in sending e-mails. If you’re
sure that you have both server components installed and active, you can choose to avoid this
double outgoing e-mail scanning by checking this box and disabling the VSAPI On-access
scanner.
Number of Scanning Threads - the scanning process is threaded by default to increase the
overall scanning performance by a certain level of parallelism. You can change the threads
count here.
The default number of threads is computed as 2 times the ‘number_of_processors’ + 1.
The minimum number of threads is computed as ('number of processors'+1) divided by 2.
The maximum number of threads is computed as 'Number of Processors' multiplied by 5 + 1.
If the value is the minimum or lesser value or the maximum or greater, the default value is
used.
Scan Timeout - the maximum continuous interval (in seconds) for one thread to access the
message that is being scanned (the default value is 180 seconds).
The Scanning properties section:
Use Heuristics - check this box to enable heuristic analysis method during scanning.
Report Potentially Unwanted Programs and Spyware threats - check this option to report
the presence of potentially unwanted programs and spyware.
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Report enhanced set of Potentially Unwanted Programs - check to detect extended
package of spyware: programs that are perfectly ok and harmless when acquired from the
manufacturer directly, but can be misused for malicious purposes later, or programs that
always harmless but might be unwanted (various toolbars etc.). This is an additional measure
that increases your computer security and comfort even more, however it can possibly block
legal programs, and is therefore switched off by default. Note: This detection feature is
additional to the previous option, so if you want protection from the basic types of spyware,
always keep the previous box checked.
Scan inside archives - check this option to let the scanner look also inside archived files
(zip, rar, etc.)
The E-mail attachments reporting section allows you to choose which items should be reported
during scanning. The default configuration can be easily amended in the Detection actions section,
part Information (see below).
The following options are available:
Report password protected archives
Report password protected documents
Report files containing macro
Report hidden extensions
Generally, some of these features are user extensions of the Microsoft VSAPI 2.0/2.5 application
interface services. For the detailed information on the VSAPI 2.0/2.5 please refer to the following
links (and also the links accessible from the referenced ones):
http://support.microsoft.com/default.aspx?scid=kb;en-us;328841&Product=exch2k - for
information on Exchange and antivirus software interaction
http://support.microsoft.com/default.aspx?scid=kb;en-us;823166 for information on
additional VSAPI 2.5 features in Exchange 2003 Server application.
There are also these sub-items available in the following tree structure:
Detection actions
Mail filtering
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4.5. Detection Actions
In the Detection actions sub-item you can choose automatic actions that should take place during
the scanning process.
The actions are available for the following items:
Infections
PUP (Potentially Unwanted Programs)
Warnings
Information
Use the roll-down menu to choose an action for each item:
None - no action will be taken.
Move to Vault - the given threat will be moved to Virus Vault.
Remove - the given threat will be removed.
To select a custom subject text for messages that contain the given item/threat, check the Mark
subject with... box and fill-in a preferred value.
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Note: The last mentioned feature is not available for E-mail Scanner for MS Exchange VSAPI.
4.6. Mail Filtering
In the Mail Filtering sub-item you can choose which attachments should be automatically removed,
if any. The following options are available:
Remove attachments - check this box to enable the feature.
Remove all executable files - removes all executables.
Remove all documents - removes all document files.
Remove files with these comma separated extensions - fill the box with file extensions you
wish to automatically remove. Separate the extensions with comma.
Move filtered attachments into virus vault - check if you don't want the filtered attachments
to be removed completely. With this box checked, all attachments chosen in this dialog will
be automatically moved into the Virus Vault quarantine environment. It is a safe place to store
potentially malicious files - you can view and examine them without endangering your system.
The Virus Vault can be accessed from the upper menu of your AVG Email Server Edition
2012 main interface. Simply left-click the History item a choose Virus Vault item from the
drop-down menu.
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5. E-mail Scanner for MS Exchange Server 2003
5.1. Overview
The E-mail Scanner for MS Exchange Server 2003 configuration options are fully integrated within
the AVG Email Server Edition 2012 as a server component.
The server components include the following:
Basic overview of the individual server components:
Anti-Spam - Anti-Spam Server for MS Exchange
Checks all incoming e-mail messages and marks unwanted e-mails as SPAM. It uses several
analyzing methods to process each e-mail message, offering maximum possible protection
against unwanted e-mail messages.
EMS (VSAPI) - E-mail Scanner for MS Exchange (VSAPI)
Checks all e-mail messages stored in user mailboxes. If any viruses are detected, they are
moved to the Virus Vault, or completely removed.
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Click a required component icon to open its interface. The Anti-Spam component has its own
unique screen described in a separate chapter. The E-mail Scanner for MS Exchange (VSAPI)
interface features the following control buttons and links:
Scan Results
Opens a new dialog where you can review scan results:
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Here you can check messages divided into several tabs according to their severity. See
configuration of individual components for amending the severity and reporting.
By default there are displayed only results for the last two days. You can change the
displayed period by amending the following options:
o
Show last - insert preferred days and hours.
o
Show selection - choose a custom time and date interval.
o
Show all - Displays results for the whole time period.
Use Refresh button to reload the results.
Refresh statistical values - updates stats displayed above.
Reset statistical values - resets all the stats to zero.
The working buttons are as follows:
Settings - use this button to open settings of the component.
Back - press this button to return to the Server components overview.
You will find more information on individual settings of all components in the chapters below.
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5.2. E-mail Scanner for MS Exchange (VSAPI)
This item contains settings of the E-mail Scanner for MS Exchange (VSAPI).
The Basic Settings section contains the following options:
Enable component - uncheck to disable the whole component.
Language - select preferred component language.
The Logging settings section:
Log file size - choose a preferred size of the log file. Default value: 100 MB.
The Scan settings section:
Background Scan – you can enable or disable the background scanning process here.
Background scanning is one of the features of the VSAPI 2.0/2.5 application interface. It
provides threaded scanning of the Exchange Messaging Databases. Whenever an item that
has not been scanned with the latest AVG virus base update is encountered in the users’
mailbox folders, it is submitted to AVG for Exchange Server to be scanned. Scanning and
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searching for the not examined objects runs in parallel.
A specific low priority thread is used for each database, which guarantees other tasks (e.g. email messages storage in the Microsoft Exchange database) are always carried out
preferentially.
Proactive Scan (incoming messages)
You can enable or disable the proactive scanning function of VSAPI 2.0/2.5 here. This
scanning occurs when an item is delivered to a folder, but a request has not been made by a
client.
As soon as messages are submitted to the Exchange store, they enter the global scanning
queue as low priority (maximum of 30 items). They are scanned on the first in, first out (FIFO)
basis. If an item is accessed while still in the queue, it is changed to high priority.
Note: Overflow messages will continue to the store unscanned.
Note: Even if you disable both Background Scan and Proactive Scan options, the on access
scanner will be still active when an user will try to download a message with the MS Outlook client.
Scan RTF - you can specify here, whether the RTF file type should be scanned or not.
Number of Scanning Threads - the scanning process is threaded by default to increase the
overall scanning performance by a certain level of parallelism. You can change the threads
count here.
The default number of threads is computed as 2 times the ‘number_of_processors’ + 1.
The minimum number of threads is computed as ('number of processors'+1) divided by 2.
The maximum number of threads is computed as 'Number of Processors' multiplied by 5 + 1.
If the value is the minimum or lesser value or the maximum or greater, the default value is
used.
Scan Timeout - the maximum continuous interval (in seconds) for one thread to access the
message that is being scanned (the default value is 180 seconds).
The Scanning properties section:
Use Heuristics - check this box to enable heuristic analysis method during scanning.
Report Potentially Unwanted Programs and Spyware threats - check this option to report
the presence of potentially unwanted programs and spyware.
Report enhanced set of Potentially Unwanted Programs - check to detect extended
package of spyware: programs that are perfectly ok and harmless when acquired from the
manufacturer directly, but can be misused for malicious purposes later, or programs that
always harmless but might be unwanted (various toolbars etc.). This is an additional measure
that increases your computer security and comfort even more, however it can possibly block
legal programs, and is therefore switched off by default. Note: This detection feature is
additional to the previous option, so if you want protection from the basic types of spyware,
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always keep the previous box checked.
Scan inside archives - check this option to let the scanner look also inside archived files
(zip, rar, etc.)
The E-mail attachments reporting section allows you to choose which items should be reported
during scanning. The default configuration can be easily amended in the Detection actions section,
part Information (see below).
The following options are available:
Report password protected archives
Report password protected documents
Report files containing macro
Report hidden extensions
Generally, all these features are user extensions of the Microsoft VSAPI 2.0/2.5 application interface
services. For the detailed information on the VSAPI 2.0/2.5 please refer to the following links (and
also the links accessible from the referenced ones):
http://support.microsoft.com/default.aspx?scid=kb;en-us;328841&Product=exch2k - for
information on Exchange and antivirus software interaction
http://support.microsoft.com/default.aspx?scid=kb;en-us;823166 for information on
additional VSAPI 2.5 features in Exchange 2003 Server application.
There are also these sub-items available in the following tree structure:
Detection actions
Mail filtering
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5.3. Detection Actions
In the Detection actions sub-item you can choose automatic actions that should take place during
the scanning process.
The actions are available for the following items:
Infections
PUP (Potentially Unwanted Programs)
Warnings
Information
Use the roll-down menu to choose an action for each item:
None - no action will be taken.
Move to Vault - the given threat will be moved to Virus Vault.
Remove - the given threat will be removed.
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5.4. Mail Filtering
In the Mail Filtering sub-item you can choose which attachments should be automatically removed,
if any. The following options are available:
Remove attachments - check this box to enable the feature.
Remove all executable files - removes all executables.
Remove all documents - removes all document files.
Remove files with these comma separated extensions - fill the box with file extensions you
wish to automatically remove. Separate the extensions with comma.
Move filtered attachments into virus vault - check if you don't want the filtered attachments
to be removed completely. With this box checked, all attachments chosen in this dialog will
be automatically moved into the Virus Vault quarantine environment. It is a safe place to store
potentially malicious files - you can access and examine them without endangering your
system. The Virus Vault can be accessed from the upper menu of your AVG Email Server
Edition 2012 main interface. Simply left-click the History item a choose Virus Vault item
from the drop-down menu.
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6. AVG for Kerio MailServer
6.1. Configuration
The anti-virus protection mechanism is integrated directly into the Kerio MailServer application. In
order to activate e-mail protection of Kerio MailServer by the AVG scanning engine, launch the Kerio
Administration Console application. In the control tree on the left side of the application window
choose the Content Filter sub-branch in the Configuration branch:
Clicking the Content Filter item will display a dialog with three items:
Spam Filter
Antivirus (see section Antivirus)
Attachment Filter (see section Attachment Filter)
6.1.1. Antivirus
To activate AVG for Kerio MailServer, select the Use external antivirus checkbox and choose the
AVG Email Server Edition item from the external software menu in the Antivirus usage frame of the
configuration window:
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In the following section you can specify what to do with an infected or filtered message:
If a virus is found in a message
This frame specifies the action to be carried out when a virus is detected in a message, or
when a message is filtered by an attachment filter:
o
Discard the message – when selected, the infected or filtered message will be deleted.
o
Deliver the message with the malicious code removed – when selected, the
message will be delivered to the recipient, but without the possibly harmful
attachment.
o
Forward the original message to administrator address – when selected, the virus
infected message is forwarded to the address specified in the address text field
o
Forward the filtered message to administrator address - when selected, the filtered
message is forwarded to the address specified in the address text field
If a part of message cannot be scanned (e.g. encrypted or corrupted file)
This frame specifies the action to be taken when part of the message or attachment cannot
be scanned:
o
Deliver the original message with a prepared warning — the message (or
attachment) will be delivered unchecked. The user will be warned that the message
may still contain viruses.
o
Reject the message as if it was virus — the system will react the same way as when
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a virus was detected (i.e. the message will be delivered without any attachment or
rejected). This option is safe, but sending password protected archives will be virtually
impossible.
6.1.2. Attachment Filter
In the Attachment Filter menu there is a list of various attachment definitions:
You can enable/disable filtering of mail attachments by selecting the Enable attachment filter
checkbox. Optionally you can change the following settings:
Send a warning to sender that the attachment was not delivered
The sender will receive a warning from Kerio MailServer, that he/she has sent a message with
a virus or blocked attachment.
Forward the original message to administrator address
The message will be forwarded (as it is — with the infected or forbidden attachment) to a
defined email address, regardless of whether it is a local or an external address.
Forward the filtered message to administrator address
The message without its infected or prohibited attachment will be (apart from the actions
selected below) forwarded to the specified e-mail address. This can be used to verify the
correct functioning of the antivirus and/or attachment filter.
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In the list of extensions, each item has four fields:
Type – specification of the kind of attachment determined by the extension given in the
Content field. Possible types are File name or MIME type. You can select the respective box
in this field to include/exclude the item from attachment filtering.
Content – an extension to be filtered can be specified here. You can use operation system
wildcards here (for example the string ‘*.doc.*’ stands for any file with the .doc extension, and
any other extension following).
Action – define action to be performed with the particular attachment. Possible actions are
Accept (accept the attachment), and Block (an action will be performed as defined above the
list of disabled attachments).
Description – description of the attachment is defined in this field.
An item is removed from the list by pressing the Remove button. You can add another item to the
list by pressing the Add… button. Or, you can edit an existing record by pressing the Edit… button.
The following window then appears:
In the Description field you can write a short description of the attachment to be filtered.
In the If a mail message contains an attachment where field you can select the type of
attachment (File name or MIME type). You can also choose a particular extension from the
offered extensions list, or you can type the extension wildcard directly.
In the Then field you can decide whether to block the defined attachment or accept it.
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7. Anti-Spam Configuration
7.1. Anti-Spam Principles
Spam refers to unsolicited e-mail, mostly advertising a product or service that is mass mailed to a
huge number of e-mail addresses at a time, filling recipients’ mail boxes. Spam does not refer to
legitimate commercial e-mail for which consumers have given their consent. Spam is not only
annoying, but also can often be a source of scams, viruses or offensive content.
Anti-Spam checks all incoming e-mail messages and marks unwanted e-mails as SPAM. It uses
several analyzing methods to process each e-mail message, offering maximum possible protection
against unwanted e-mail messages.
7.2. Anti-Spam Interface
You will find the Anti-Spam server component's dialog in the Server Components section (left
menu). It contains a brief information about the functionality of the server component, information on
its current status (Anti-Spam Server for MS Exchange component is active.), and some statistics.
Available links:
Scan Results
Opens a new dialog where you can review anti-spam scan results:
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Here you can check messages detected either as a SPAM (unwanted messages) or a
Phishing attempt (an effort to steal your personal data, banking details, identity etc.). By
default there are displayed only results for the last two days. You can change the displayed
period by amending the following options:
o
Show last - insert preferred days and hours.
o
Show selection - choose a custom time and date interval.
o
Show all - Displays results for the whole time period.
Use Refresh button to reload the results.
Refresh statistical values - updates stats displayed above.
Reset statistical values - resets all the stats to zero.
The Anti-Spam settings section of the dialog contains a single checkbox Enable Anti-Spam.
Uncheck it to disable Anti-Spam protection (i. e. deactivate the whole component). Anti-Spam
protection can be turned on again either using this same checkbox, or by checking similar checkbox
in Anti-Spam settings.
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The working buttons are as follows:
Settings - use this button to open Anti-Spam settings.
Back - press this button to return to the Server components overview.
7.3. Anti-Spam Settings
In the Anti-Spam basic settings dialog you can check the Turn on Anti-Spam protection
checkbox to allow/forbid the anti-spam scanning of e-mail communication.
In this dialog you can also select more or less aggressive scoring measures. The Anti-Spam filter
assigns each message a score (i.e. how similar the message content is to SPAM) based on several
dynamic scanning techniques. You can adjust the Mark message as spam if the score is greater
or equal to setting by either typing the value (50 to 90) or by moving the slider left or right.
Here is a general review of the scoring threshold:
Value 90 - Most incoming e-mail messages will be delivered normally (without being marked
as spam). The most easily identified spam will be filtered out, but a significant amount of
spam may still be allowed through.
Value 80-89 - E-mail messages likely to be spam will be filtered out. Some non-spam
messages may be incorrectly filtered as well.
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Value 60-79 - Considered as a quite aggressive configuration. E-mail messages that are
possibly spam will be filtered out. Non-spam messages are likely to be caught as well.
Value 50-59 - Very aggressive configuration. Non-spam e-mail messages are as likely to be
caught as real spam messages. This threshold range is not recommended for normal use.
You can further define how the detected spam e-mail messages should be treated:
Modify subject for messages marked as spam - tick this check box if you would like all
messages detected as spam to be marked with a specific word or character in the e-mail
subject field; the desired text can be typed in the activated text field.
Ask before reporting wrong detection - provided that during the installation process you
agreed to participate in the Product Improvement Programme - this programme helps us to
collect up-to-date information on the latest threats from all participants worldwide, and in
return we can improve protection for everyone - i.e. you allowed reporting of detected threats
to AVG. The reporting is taken care of automatically. However, you may mark this check box
to confirm you want to be asked before any detected spam gets reported to AVG to make
sure the message should really be classified as spam.
Train Anti-Spam button opens the Anti-Spam training wizard described in details in the next
chapter.
7.3.1. Anti-Spam Training Wizard
The first dialog of the Anti-Spam Training Wizard asks you to select the source of e-mail
messages you want to use for training. Usually, you will want to use either e-mails that have been
incorrectly marked as SPAM, or spam messages that have not been recognized.
There are the following options to choose from:
A specific e-mail client - if you use one of the listed e-mail clients (MS Outlook , Outlook
Express, The Bat!, Mozilla Thunderbird), simply select the respective option
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Folder with EML files - if you use any other e-mail program, you should first save the
messages to a specific folder (in .eml format), or make sure that you know the location of
your e-mail client message folders. Then select Folder with EML files, which will enable you
to locate the desired folder in the next step
For faster and easier training process, it is a good idea to sort the e-mails in the folders beforehand,
so that the folder you will use for training contains only the training messages (either wanted, or
unwanted). However, it is not necessary, as you will be able to filter the e-mails later on.
Select the appropriate option and click Next to continue the wizard.
7.3.2. Select Folder with Messages
Dialog displayed in this step depends on your previous selection.
Folders with EML files
In this dialog, please select the folder with the messages you want to use for training. Press the
Add folder button to locate the folder with the .eml files (saved e-mail messages). The selected
folder will then be displayed in the dialog.
In the Folders contain drop-down menu, set one of the two options - whether the selected folder
contains wanted (HAM), or unsolicited (SPAM) messages. Please note that you will be able to filter
the messages in the next step, so the folder does not have to contain only training e-mails. You can
also remove unwanted selected folders from the list by clicking the Remove folder button.
When done, click Next and proceed to Message filtering options.
Specific e-mail client
Once you confirm one of the options, new dialog will appear.
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Note: In case of Microsoft Office Outlook , you will be prompted to select the MS Office Outlook
profile first.
In the Folders contain drop-down menu, set one of the two options - whether the selected folder
contains wanted (HAM), or unsolicited (SPAM) messages. Please note that you will be able to filter
the messages in the next step, so the folder does not have to contain only training e-mails. A
navigation tree of the selected e-mail client is already displayed in the main section of the dialog.
Please locate the desired folder in the tree and highlight it with your mouse.
When done, click Next and proceed to Message filtering options.
7.3.3. Message filtering options
In this dialog, you can set filtering of the e-mail messages.
All messages (no filtering) - If you are sure that the selected folder contains only
messages you want to use for training, select the All messages (no filtering) option.
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Use filter - For more advanced filtering, select the Use filter option. You can fill in a word (
name), part of a word, or phrase to be searched for in the e-mail subject and/or the sender's
field. All messages matching exactly the entered criteria will be used for the training,
without further prompting. When you fill in both text fields, addresses that match just one of
the two conditions will be used, too!
Ask for each message - If you are unsure about the messages contained in the folder, and
you want the wizard to ask you about every single message (so that you can determine
whether to use it for training or not), select the Ask for each message option.
When the appropriate option has been selected, click Next. The following dialog will be informative
only, telling you that the wizard is ready to process the messages. To start training, click the Next
button again. Training will then start according to previously selected conditions.
7.4. Performance
The Engine performance settings dialog (link ed to via the Performance item of the left navigation)
offers the Anti-Spam component performance settings. Move the slider left or right to change the
level of scanning performance ranging between Low memory / High performance modes.
Low memory - during the scanning process to identify spam, no rules will be used.
Only training data will be used for identification. This mode is not recommended
for common use, unless the computer hardware is really poor.
High performance - this mode will consume large amount of memory. During the
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scanning process to identify spam, the following features will be used: rules and
spam database cache, basic and advanced rules, spammer IP addresses and
spammer databases.
The Enable on-line checking item is on by default. It results in more precise spam detection via
communication with the Mailshell servers, i.e. the scanned data will be compared with Mailshell
databases online.
Generally it is recommended to keep the default settings and only change them if you have a
valid reason to do so. Any changes to this configuration should only be done by expert users!
7.5. RBL
The RBL item open an editing dialog called Realtime Blackhole Lists:
In this dialog you can switch on/off the Query RBL servers function.
The RBL (Realtime Black hole List) server is a DNS server with an extensive database of known
spam senders. When this feature is switched on, all e-mail messages will be verified against the
RBL server database and marked as spam if identical to any of the database entries.
The RBL servers databases contain the latest up-to-the-minute spam fingerprints, to provide the very
best and most accurate spam detection. This feature is especially useful for users who receive large
amounts of spam that is not being normally detected by the Anti-Spam engine.
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The RBL servers list allows you to define specific RBL server locations. By default, two RBL server
addresses are specified. We recommend to keep the default settings unless you are an experienced
user and really need to change these settings!
Note: Enabling this feature may, on some systems and configurations, slow down the e-mail
receiving process, as every single message must be verified against the RBL server database.
No personal data is sent to the server!
7.6. Whitelist
The Whitelist item opens a dialog with a global list of approved sender e-mail addresses and domain
names whose messages will never be marked as spam.
In the editing interface you can compile a list of senders that you are sure will never send you
unwanted messages (spam). You can also compile a list of full domain names (e.g. avg.com), that
you know do not generate spam messages.
Once you have such a list of senders and/or domain names prepared, you can enter them by either
of the following methods: by direct entry of each e-mail address or by importing the whole list of
addresses at once. The following control buttons are available:
Edit - press this button to open a dialog, where you can manually enter a list of addresses
(you can also use copy and paste). Insert one item (sender, domain name) per line.
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Import - you can import your existing e-mail addresses by selecting this button. The input file
can be a text file (in plain text format, and the content must contain only one item - address,
domain name - per line), WAB file or the import can be done from Windows Address Book or
Microsoft Office Outlook.
Export - if you decide to export the records for some purpose, you can do so by pressing this
button. All records will be saved to a plain text file.
7.7. Blacklist
The Blacklist item opens a dialog with a global list of blocked sender e-mail addresses and domain
names whose messages will always be marked as spam.
In the editing interface you can compile a list of senders that you expect to send you unwanted
messages (spam). You can also compile a list of full domain names (e.g. spammingcompany.com),
that you expect or receive spam messages from. All e-mail from the listed addresses/domains will
be identified as spam.
Once you have such a list of senders and/or domain names prepared, you can enter them by either
of the following methods: by direct entry of each e-mail address or by importing the whole list of
addresses at once. The following control buttons are available:
Edit - press this button to open a dialog, where you can manually enter a list of addresses
(you can also use copy and paste). Insert one item (sender, domain name) per line.
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Import - you can import your existing e-mail addresses by selecting this button. The input file
can be a text file (in plain text format, and the content must contain only one item - address,
domain name - per line), WAB file or the import can be done from Windows Address Book or
Microsoft Office Outlook.
Export - if you decide to export the records for some purpose, you can do so by pressing this
button. All records will be saved to a plain text file.
7.8. Expert Settings
Typically it is recommended to keep the default settings and only change them if you have a
valid reason to do so. Any changes to configuration should only be done by expert users!
If you still believe you need to change the Anti-Spam configuration at the very expert level, please
follow the instructions provided directly in the user interface. Generally, in each dialog you will find
one single specific feature and you can edit it - its description is always included in the dialog itself:
Cache - fingerprint, domain reputation, LegitRepute
Training - maximum word entries, auto training threshold, weight
Filtering - language list, country list, approved IPs, blocked IPs, blocked countries, blocked
charsets, spoofed senders
RBL - RBL servers, multihit, threshold, timeout, maximum IPs
Internet connection - timeout, proxy server, proxy authentication
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8. AVG Settings Manager
The AVG Settings Manager is a tool suitable mainly for smaller networks that allows you to copy,
edit and distribute AVG configuration. The configuration can be saved to a portable device (USB flash
drive etc.) and then applied manually to chosen stations.
The tool is included in the installation of AVG and available via Windows Start menu:
All Programs/AVG 2012/AVG Settings Manager
AVG Settings
o Edit AVG Settings - use this link to open dialog with advanced settings of your local
AVG. All changes made here will be reflected also to the local AVG installation.
o Load and edit AVG settings - if you already have an AVG configuration file (.pck),
use this button to open it for editing. Once you confirm your changes by the OK or
Apply button, the file will be replaced with the new settings!
AVG Firewall settings
This section would allow you to mak e changes to Firewall settings of your local AVG
installation, or to edit Firewall settings in already prepared AVG configuration file (.pck ).
However, since your AVG Email Server Edition 2012 doesn't include the Firewall
component, both link s are grayed out and functionless.
Load Options
o Load a saved settings to AVG - use this link to open an AVG configuration file (.
pck) and apply it to the local installation of AVG.
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Store Options
o Store local AVG settings to a file - use this link to save the AVG configuration file (.
pck) of the local AVG installation. If you did not set a password for the Allowed
actions, you may experience the following dialog:
Answer Yes if you wish to set the password for access to Allowed items now and
then fill-in the required information and confirm your choice. Answer No to skip the
password creation and continue to save the local AVG configuration to a file.
Clone Options
o Apply identical settings across your network - clicking this link allows you to
make a copy of the local AVG installation by creating an installation package with
custom options. The clone includes most of the AVG settings with the exception of
the following:
Language settings
Sounds settings
Allowed list and potentially unwanted programs exceptions of the Identity
protection component.
To proceed first select folder where the installation script will be saved.
Then from the drop-down menu select one of the following:
Hidden installation - no information will be displayed during the setup process.
Show installation progress only - the installation will not require any user
attention, but the progress will be fully visible.
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Show installation wizard - the installation will be visible and user will need to
manually confirm all steps.
Use either the Download button to download the latest available AVG installation
package directly from the AVG website to the selected folder or manually put the
AVG installation package into that folder.
You can use the Proxy button to define a proxy server settings if your network
requires this for a successful connection.
By clicking OK the cloning process begins and should shortly finish. You may also
experience a dialog asking about setting password to Allowed items (see above).
Once finished, there should be AvgSetup.bat available in the chosen folder along
with other files. If you run the AvgSetup.bat file, it will install AVG according to the
parameters chosen above.
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9. FAQ and Technical Support
Should you have any problems with your AVG, either business or technical, please refer to the FAQ
section of the AVG website at http://www.avg.com.
If you do not succeed in finding help this way, contact the technical support department by email.
Please use the contact form accessible from the system menu via Help / Get help online.
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