On Fri, Mar 18, 2022 at 4:28 PM Matthew Pounsett via mailop < mailop@mailop.org> wrote:
> The 4xx error message we were getting > included a URL to some best practices, which suggested signing up for > Yahoo's Complaint Feedback Loop, but without providing any indication > of how to do that. > That "URL" is our postmaster / sender support site. Everything you are looking for is right there. So not sure why you did not click on "Contact". Or at least "FAQs".
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