Cisco Cisco Email Security Appliance C170 Guia Do Utilizador

Add a disclaimer in Russian to the messages that are in Russian

Drop the messages whose language could not be determined

Use the 

message-language

 rule to take message actions depending on the language of the message 

subject and body.

This rule will not check for the language in attachments and headers.

Cisco Email Security appliance uses the built-in language detection engine to detect the language in a 
message. The appliance extracts the subject and the message body and passes it to the language detection 
engine.

The language detection engine determines the probability of each language in the extracted text and 
passes it back to the appliance. The appliance considers the language with the highest probability as the 
language of the message. The appliance considers the language of the message as ‘undetermined’ in one 
of the following scenarios:

If the detected language is not supported by Cisco Email Security appliance

If the appliance is unable to detect the language of the message

If the total size of the extracted text sent to the language detection engine is less than 50 bytes.

<msg_filter_name>: if (message-language <operator> "<language1>, <language2>,..., 

<language n>") {<action>}

Where: 

msg_filter_name

 is the name of this message filter. 

operator 

is 

== 

or

 !=

.

language

 is the value of message language that you want to specify in this message filter. Separate 

multiple entries with commas. For a list of supported message languages and values, look at the 
Message Language condition in a content filter. Values are enclosed with brackets ([ and ]).

action

 is any message filter action. 

The following example shows how to drop the messages whose language could not be determined:

DropMessagesWithUndeterminedLanguage: if (message-language == "unknown") { drop(); }

The following example shows how to add a disclaimer in Russian to the messages in Russian:

ussianDisclaimerRule: if (message-language == "ru") { add-heading("RussianDisclaimer"); 

You may want to detect fraudulent messages with forged sender address (From: header) and perform 
actions on such messages.