Cisco Cisco Email Security Appliance C170 Guia Do Utilizador

For graymail detection, anti-spam scanning must be enabled globally and per applicable mail policy. 
This can be either the IronPort Anti-Spam or the Intelligent Multi-Scan feature. See 

For safe unsubscribing, 

Add the safe unsubscribing feature key.

The end user machines must be able to connect to the cloud-based Unsubscribe Service directly 
over the Internet.

You can enable Graymail Detection and Safe Unsubscribing at the machine, group or cluster level.

Meet the 

Click Security Services > Detection and Safe Unsubscribe.

Click Edit Global Settings.

Check Enable Graymail Detection. 

(Optional) To optimize the throughput of your appliance while still being able to scan increasingly larger 
messages sent by graymail senders, configure the thresholds for message scanning:

Maximum size of the message that you want the appliance to scan.

The number of seconds to wait for timeout when scanning a message.

Check Enable Safe Unsubscribe.

Submit and commit your changes.

Click Mail Policies > Incoming Mail Policies.