Symantec 10744983 - Mail Security 8320, Administration Manual

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To configure invalid recipient handling
1 In the Control Center, click Settings > Invalid Recipients.
2
Do one of the following:
■
Uncheck Drop messages for invalid recipients to return bounce messages
to the sender for invalid addresses.
■
Check Drop messages for invalid recipients to drop invalid messages
from the mail stream and return no bounce messages to the sender. For
this setting to take effect, a full synchronization and replication cycle
must be completed.
This setting is independent of the Directory Harvest Attack Email Firewall
policy, and can be used in conjunction with it.
3
Click Save.
Configuring scanning settings
Use the Scanning Settings page to configure container settings and content
filtering settings.
Configuring container settings
When Symantec Mail Security processes certain zip files and other types of
compressed files, these files can expand to the point where they deplete system
memory. Such container files are often referred to as “zip bombs.” Symantec Mail
Security can handle such situations by automatically sidelining large attachments
and stripping the attachments. There is a presumption that such a file can be a
zip bomb and should not be allowed to deplete system resources. The file is
sidelined only because of its size, not because of any indication that it contains a
virus.
You can specify this size threshold and the maximum extraction level that
Symantec Mail Security will process in memory, as well as a time limit for scanning
containers. If the configured limits are reached, Symantec Mail Security will
automatically perform the action designated for the “unscannable” category in
the Group Policies settings.
Configuring email settings
Configuring scanning settings
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