Cisco Cisco Email Security Appliance C690 用户指南
11-10
Cisco AsyncOS 8.0.2 for Email User Guide
Chapter 11 Content Filters
How Content Filters Work
Strip Attachment by
Content
Content
Attachment contains. Drops all attachments on messages that contain the
regular expression. Archive files (zip, tar) will be dropped if any of the files
they contain match the regular expression pattern.
regular expression. Archive files (zip, tar) will be dropped if any of the files
they contain match the regular expression pattern.
Contains smart identifier. Drops all attachments on a message that contains
the specified smart identifier.
the specified smart identifier.
Attachment contains terms in the content dictionary. Does the
attachment contain any of the regular expressions or terms in the content
dictionary named <dictionary name>?
attachment contain any of the regular expressions or terms in the content
dictionary named <dictionary name>?
Number of matches required. Specify the number of matches required for
the rule to evaluate to true. You can specify this threshold for text, smart
identifier, or content dictionary matches.
the rule to evaluate to true. You can specify this threshold for text, smart
identifier, or content dictionary matches.
Replacement message. The optional comment serves as the means to
modify the text used to replace the attachment that was dropped. Attachment
footers simply append to the message.
modify the text used to replace the attachment that was dropped. Attachment
footers simply append to the message.
Table 11-3
Content Filter Actions (continued)
Action
Description