DocumentationGlossary View and Edit Feedback Loop A feedback loop is the process by which an ISP forwards emails reported as spam (see complaint) for immediate removal by the sender. To get more information please check out our Email Infrastructure Guide Was this helpful? Yes No Feedback SendGrid Pricing Try SendGrid for Free Contact Us × Feedback If you have a question that needs an answer, please contact support. Otherwise, please open an issue or drop us a line. Thanks for helping us improve the docs!