InterScan™ Messaging Security Appliance (IMSA) can take action on an email message based on the content in the subject line, body, header or attachment. To filter by message content, add and enable keywords or regular expressions to a keyword expression list. You can configure several expression lists and enable or disable them at any time. To configure a list that is very similar to an existing list, copy a list and then edit the copy.
To select scanning conditions for content:
Under Content on the scanning conditions selection screen, select the check boxes next to the parts of an email message to which you want the content conditions to apply.
Click the link that specifies the part of the email message to which you want to configure content conditions.
The Keyword Expressions screen appears with two columns:
Available—Expressions available for use.
Selected—Expressions currently in use.
If you are configuring expressions for the header, select the check boxes next to the header items where the expression will apply.
Click Add. The screen for managing keyword expressions appears.
In the Available list, click the expression list you want to enable.
Click >>. The expressions appear in the Selected list.
To keep an expression list available but temporarily prevent IMSA from using it, click the expression in the selected list, and then click <<.
Click Save to continue scanning conditions selection screen.
To copy an expression list:
In the Available column, click the expression list.
Click Copy.
A copy of the list appears in the Available column with the words Copy of in front of the original name.
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