To be fair, me labeling something in my email client as junk doesn't signal my intent to harm other people's experience. If it does that, the blame is on the service providers: namely those signaling intent which I did not wish to signal.
The issue other users have are with their own service providers using a system that apparently can be easily gamed or falsified.
Finally, the problem is on Citibank's end, but sending unwanted email with people who have explicitly requested they stop.
If users don't get account related email they signed up for, it's on Citibank's end to solve, as well as the service providers they are using to retrieve their email. They alone are at fault.
The issue other users have are with their own service providers using a system that apparently can be easily gamed or falsified.
Finally, the problem is on Citibank's end, but sending unwanted email with people who have explicitly requested they stop.
If users don't get account related email they signed up for, it's on Citibank's end to solve, as well as the service providers they are using to retrieve their email. They alone are at fault.