How do you identify who reports your emails as spam?

[desbest]

I see that the people who run this website can identify when their users mark their emails as spam. How does this work and how is it done? I'd like to implement that feature for my own websites.

 

[z3r010]

We send our emails via Amazon SES and they are registered with all the major mail provider feedback loops and let us know whenever there is a spam report, if you run your own mailservers then you will need to find the form for each email providers feedback loop and register individually.