Trend Micro InterScan M Series, Administrator'S Manual

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Trend Micro™ InterScan™ Gateway Security Appliance M-Series Administrator’s Guide
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An administrator cannot modify the method that the anti-spam engine uses to assign
spam scores but can adjust the detection levels that the anti-spam engine uses to
decide which messages to treat as spam.
For example, spammers sometimes use numerous exclamation marks (!!!!) in their
email messages. When the anti-spam engine detects a message that uses exclamation
marks this way, it increases the spam score for that email message.
Tip: In addition to using Anti-Spam to screen spam, you can configure content filtering
to scan message headers, subject, body, and attachment information for spam and
other undesirable content.
Approved and Blocked Senders Lists
An Approved Senders list is a list of trusted email addresses. InterScan Gateway
Security Appliance will not classify messages arriving from these addresses as spam.
A Blocked Senders list is a list of suspect email addresses. InterScan Gateway
Security Appliance always categorizes email messages from blocked senders as
spam and takes the appropriate action.
The InterScan Gateway Security Appliance administrator uses the Anti-Spam screen
to manage these lists. The administrator’s Approved Senders list and Blocked
Senders list control how InterScan Gateway Security Appliance handles email
messages bound for the end users.
Use the Web console to set up lists of Approved or Blocked Senders to control how
the appliance filters email messages.
InterScan Gateway Security Appliance does not classify addresses from the
Approved Senders list as spam unless it detects a phishing incident. If InterScan
Gateway Security Appliance detects a phishing incident in a message from an
Approved sender, it will classify the message as phishing and will take the action for
phishing.
InterScan Gateway Security Appliance filters addresses from Blocked Senders lists
and always classifies them as spam and takes the action set by the administrator.