Cisco Cisco Email Security Appliance C160 Guía Del Usuario
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Cisco AsyncOS 9.0 for Email User Guide
Chapter 9 Using Message Filters to Enforce Email Policies
Using the CLI to Manage Message Filters
The first prompt determines whether or not a message header’s encoding should be changed to match
that of the message body if the header is changed (via a filter, for example).
that of the message body if the header is changed (via a filter, for example).
The second prompt controls whether or not the appliance should impose the encoding of the message
body on the header if the header is not properly tagged with a character set.
body on the header if the header is not properly tagged with a character set.
The third prompt is used to configure how disclaimer stamping (and multiple encodings) in the message
body works. Please see “Disclaimer Stamping and Multiple Encodings” in the “Text Resources” chapter
for more information.
body works. Please see “Disclaimer Stamping and Multiple Encodings” in the “Text Resources” chapter
for more information.
Sample Message Filters
In the following example, the
filter
command is used to create three new filters:
•
The first filter is named
big_messages
. It uses the
body-size
rule to drop messages larger than 10
megabytes.
•
The second filter is named
no_mp3s
. It uses the
attachment-filename
rule to drop messages that
contain attachments with the filename extension of
.mp3
.
•
The third filter is named
mailfrompm
. It uses
mail-from
rule examines all mail from
postmaster@example.com
and blind-carbon copies
administrator@example.com
.
always try to use the message body's encoding for the footer or
heading. If that fails, and if the message body's encoding is US-
ASCII, the system can try to edit the message body to use the footer's
or heading's encoding. Should the system try to impose the footer's
or headings's encoding on the message body? [N]> y
Behavior when modifying headers: Use encoding of message body
Behavior for untagged non-ASCII headers: Impose encoding of message
body. Behavior for mismatched footer or heading encoding: Try both
body and footer or heading encodings
Choose the operation you want to perform:
- SETUP - Configure multi-lingual settings.