Cisco Cisco Email Security Appliance C170 Guia Do Utilizador

Both anti-spam scanning engines can distinguish between spam and unwanted marketing messages from 
a legitimate source. Even though marketing messages are not considered spam, your organization or 
end-users may not want to receive them. Like spam, you have the option to deliver, drop, quarantine, or 
bounce unwanted marketing messages. You also have the option to tag unwanted marketing messages by 
adding text to the message’s subject to identify it as marketing.

You can rewrite URLs in suspected spam so that when a recipient clicks a link in the message, the request 
is routed through the Cisco Web Security proxy service, which evaluates the safety of the site at click 
time and blocks access to known malicious sites. 

Enable the URL Filtering feature and its prerequisites. See 

Apply a custom header to suspected spam messages: 

Select Mail Policies > Incoming Mail Policies. 

Click the link in the Anti-Spam column for a policy such as the Default policy. 

In the Suspected Spam Settings section, enable suspected spam scanning.

Click Advanced to display the Add Custom Header option. 

Add a custom header such as 

url_redirect

. 

Submit and commit your changes. 

Create a content filter to redirect URLs in messages that have the custom header: 

Select Mail Policies > Incoming Content Filters.

Click Add Filter. 

Name the filter 

url_redirect

. 

Click Add Condition. 

Click Other Header. 

Enter the header name: 

url_redirect

. 

Make sure this exactly matches the header you created above. 

Select Header exists.

Click OK. 

Click Add Action.

Click URL Category. 

Select all categories in Available Categories and add them to Selected Categories. 

For Action on URL, select Redirect to Cisco Security Proxy.