Not sure the best place to post this, since the support section is all about the game and not the website.
In game, when viewing mail there is a report spam button which is nifty keen.
However, when viewing the same mail on the website, there is no report spam button. Since I really enjoy the ability to manage my mail and communicate through the web interface, I would really love to see a report spam button in this mail client.
As is, I tend to just delete the messages rather than reporting them to keep my in box clear.