Cisco Cisco Email Security Appliance C160 Mode D'Emploi

Graymail messages are messages that do not fit the definition of spam, for example, newsletters, mailing 
list subscriptions, social media notifications, and so on. These messages were of use at some point in 
time, but have subsequently diminished in value to the point where the end user no longer wants to 
receive them. 

The difference between graymail and spam is that the end user intentionally provided an email address 
at some point (for example, the end user subscribed to a newsletter on an e-commerce website or 
provided contact details to an organization during a conference) as opposed to spam, messages that the 
end user did not sign up for. 

The graymail management solution in the Email Security appliance comprises of two components: an 
integrated graymail scanning engine and a cloud-based Unsubscribe Service.

The graymail management solution allows organizations to:

Identify graymail using the integrated graymail engine and apply appropriate policy controls.

Provide an easy mechanism for end users to unsubscribe from unwanted messages using 
Unsubscribe Service.

In addition to these, the graymail management solution also help organizations to provide:

Secure unsubscribe option for end users. Mimicking an unsubscribe option is a popular phishing 
technique. For this reason, the end users are generally wary of clicking unknown unsubscribe links. 
For such scenarios, the cloud-based Unsubscribe Service extracts the original unsubscribe URI, 
checks the reputation of the URI, and then performs the unsubscribe process on behalf of the end 
user. This protects end users from malicious threats masquerading as unsubscribe links.