Gmail Feedback Loop and Marketing Cloud sending

Clients may choose to register their domain with Gmail Postmaster Tools (Gmail Feedback Loop) to see what reputation-related data is available. All marketing emails sent from the Marketing Cloud platform to subscribers at gmail.com always automatically include Gmail’s “Feedback-ID” header. The header looks like the following: 
 Feedback-ID: 12345:7890:13.111.0.0:sfmktgcld
 

In this example, the first field (12345) is the Marketing Cloud account ID (MID or MemberID) of the account the mail was sent from. The second field (7890) is the JobID for this mail. The third field (13.111.0.0) is the IP address this mail was sent from. The last field never changes; it will always contain “sfmktgcld” to identify that this mail was sent by Salesforce Marketing Cloud.

This header will show only on messages sent to subscribers whose email address is in the domain “gmail.com.” It will not show up for any other recipients for any other domains, even if that domain’s email services are hosted by Google.

Note that Marketing Cloud does not register domains with Gmail Postmaster Tools on a client’s behalf, nor are we able to assist in interpreting reputational data provided by Google. To register for the Google Postmaster tools, follow the steps in our Google Postmaster Enrollment article.