Cisco Cisco Email Security Appliance C170 Guia Do Utilizador

End user receives a message with the graymail banner.

End user clicks on the Unsubscribe link.

Unsubscribe Service extracts the original unsubscribe URI. 

Unsubscribe Service checks the reputation of the URI. 

Depending on the reputation of the URI, the Unsubscribe Service performs one of the following actions:

If the URI is malicious, the Unsubscribe Service will not perform the unsubscribe process and 
displays a block page to the end user. 

If the URI is not malicious, depending on the URI type (

http

 or 

mailto

), the Unsubscribe Service 

sends an unsubscribe request to the graymail sender. 

If the request is successful, the Unsubscribe Service displays the “Successfully unsubscribed” 
status to the end user.

If the first unsubscribe request fails, the Unsubscribe Service displays the “Unsubscribe process 
in progress” status and provides a URL that can be used to track the status of the unsubscribing. 

End users can use this URL to track the status at a later point. After the first failed attempt, the 
Unsubscribe Service sends periodic unsubscribe requests for a duration of four hours. 

If an end user checks the status of the unsubscribe process at a later point, 

If one of the requests within the four hour duration (from the first failed attempt) is successful, 
the Unsubscribe Service displays the “Successfully unsubscribed” status to the end user. 

If none of the requests within the four hour duration (from the first failed attempt) are 
successful, the Unsubscribe Service displays the “Unable to subscribe” status to the end user 
and provides a URL that can be used to unsubscribe from the graymail manually.