> Submit your report using our "Got Spam?" form if your email provider doesn't offer a spam reporting feature.
The "Got Spam?" link takes you to a form where you can supply the headers and content of the spam message sent from Yahoo.
The web-form workflow breaks in many ways: console tools (which I use for email), mobile, and more.
The fact that I can simply "bounce" the whole message at Yahoo's spamtraps, if they had such a thing, and they can sort the message's legitimacy and structure themselves, but they don't allow this, speaks volumes.
And again, this shit for a decade or more.
Now, if Yahoo wanted to creat CLI tools to incorporate into mailflows for those of us who know what we're doing to slot into their systems, great.
But ultimately, their problems aren't mine, I've washed my hands.
This goes back years, I've not tried recently, status may have changed. But again, the long, long term experience has been pretty sour.