Cisco Cisco Email Security Appliance X1050 Guía Del Usuario
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Cisco AsyncOS 8.5.6 for Email User Guide
Appendix C Example of Mail Policies and Content Filters
Overview of Incoming Mail Policies
The table on the Incoming Mail Policies page shows the names of the filters that have been enabled
for the engineering policy.
for the engineering policy.
Figure C-19
Updated Content Filters for Incoming Mail Policies
Step 5
Commit your changes.
At this point, incoming messages that match the user list for the engineering policy will not have MP3
attachments stripped; however, all other incoming messages will have MP3 attachments stripped.
attachments stripped; however, all other incoming messages will have MP3 attachments stripped.
Notes on Configuring Content Filters in the GUI
•
It is not necessary to specify a condition when creating a content filter. When no action is defined,
any actions defined will always apply in the rule. (Specifying no action is equivalent to using the
any actions defined will always apply in the rule. (Specifying no action is equivalent to using the
true()
message filter rule — all messages will be matched if the content filter is applied to a policy.)
•
If you do not assign a custom user role to a content filter, the content filter is public and can be used
by any delegated administrator for their mail policies. See
by any delegated administrator for their mail policies. See
more information on delegated administrators and content filters.
•
Administrators and operators can view and edit all content filters on an appliance, even when the
content filters are assigned to custom user roles.
content filters are assigned to custom user roles.
•
When entering text for filter rules and actions, the following meta characters have special meaning
in regular expression matching:
in regular expression matching:
. ^ $ * + ? { [ ] \ | ( )
If you do not wish to use regular expression you should use a '\' (backslash) to escape any of these
characters. For example: "\*Warning\*"
characters. For example: "\*Warning\*"
•
When you define more than one Condition for a content filter, you can define whether all of the
defined actions (that is, a logical AND) or any of the defined actions (logical OR) need to apply in
order for the content filter to be considered a match.
defined actions (that is, a logical AND) or any of the defined actions (logical OR) need to apply in
order for the content filter to be considered a match.