Cisco Cisco Email Security Appliance C160 Mode D'Emploi

The Email Security appliance checks if the message is graymail. If the message is graymail, go to 

. 

Else, go to 

The Email Security appliance applies the configured policy actions such as, drop, deliver, bounce, or 
quarantine to the spam quarantine.

The Email Security appliance checks if safe unsubscribing enabled. If safe unsubscribing is enabled, go 
to 

. Else, go to 

.

The Email Security appliance adds a banner with unsubscribe button to the message. Also, the Email 
Security appliance rewrites the existing unsubscribe links in the message body.

The Email Security appliance processes the message through the next stages of its email work queue.

For an overview of how email is processed through the system, from reception to routing to delivery, see 

The following flow diagram shows how safe unsubscribing works.

Start

End user receives a message with 

graymail banner

End user clicks on 

the Unsubscribe 

button

Unsubscribe Service extracts the 

original unsubscribe URI 

Unsubscribe Service executes 

unsubscribe  process on behalf  of the 

end user

Stop

Is the URI 

malicious?

Unsubscribe Service checks the 

reputation of the URI

Unsubscribe Service displays a  block 

page to the end  user

YES

NO

Unsubscribe Service displays the 

status  to the end user