FBL Experiment

Jan-Philipp Benecke, Email Deliverability Engineer & Software Engineer, CleverReach

For a long time, there has been a way for a mailbox provider to route manual complaints back to the email sender.

Unfortunately, a large part of the existing feedback loops have to be set up manually.

This can be quit time consuming when it comes to setting up new ones or revising old ones.

Now that DKIM signing is becoming more and more relevant in feedback loops, it makes the maintenance, especially when it happens for customers, even more complex and costly.

Learn how a new header, the CFBL-Address header, can enhance the existing feedback loops with an automated signalling of the feedback loop address.