E-mail marketers got another boost for deliverability recently when Yahoo Mail announced that Return Path will handle its feedback loops for managing spam complaints.
This helps you as a commercial e-mail sender, because a good portion of your mailing list likely goes to yahoo.com domains, even if you mail primarily B2B (define). Up to one quarter of a typical consumer list could be Yahoo-bound. Having this new feedback loop in place means you can manage and process spam complaints coming from Yahoo Mail users that you might not have gotten previously. Once your feedback loop request is accepted, you will receive e-mail that Yahoo recipients marked as spam at the e-mail address you specify. Remove those complaining addresses promptly from your database.
https://www.clickz.com/get-into-the-feedback-loop/72953/