Overview

Domain Message Authentication Reporting & Conformance (DMARC) is another way you can protect your email domain. Email servers normally use DMARC rules when SPF or DKIM fail. When there is a failure, DMARC tells the email server what to do. For example, you could set rules that tell the email server to reject the email or to send it to the junk folder. 

Yahoo! email goes one step further and checks the return path of the email that was sent. If the return path does not match, Yahoo! will use your DMARC rules. Depending on your rules, when you send email through a third-party system like Lead Liaison, your email may be rejected or sent to spam even though SPF and DKIM have passed.

Creating A Feedback Loop

To avoid having DMARC rules invoked on valid emails, you will need to create a Complaint Feedback Loop (CFL) with Yahoo!. To create the FBL, follow these instructions:

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