Cisco Cisco Email Security Appliance X1050 Guía Del Usuario
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Cisco AsyncOS 8.0.1 for Email User Guide
Chapter 9 Using Message Filters to Enforce Email Policies
Message Filter Actions
Attachment Groups
You can specify a particular file type (“exe” files for example) or common groups of attachments in the
attachment-filetype
and
drop-attachments-by-filetype rules
. AsyncOS divides the attachments
into the groups listed in
If you create a message filter that uses the
!=
operator to match a message that does not contain an
attachment with a specific file type, the filter will not perform any action on the message if there is at
least one attachment with the file type you want to filter out. For example, the following filter drops any
message with an attachment that is not an
least one attachment with the file type you want to filter out. For example, the following filter drops any
message with an attachment that is not an
.exe
file type:
If a message has multiple attachments, the Email Security appliance does not drop the message if at least
one of the attachments is an
one of the attachments is an
.exe
file, even if the other attachments not
.exe
files.
*Encrypt and
Deliver Now
Deliver Now
encrypt
Use Cisco Email Encryption to encrypt outgoing
messages. See
messages. See
* Final Actions
Table 9-5
Message Filter Actions
Action Syntax
Description
exe_check: if (attachment-filetype != "exe") {
drop();
}