There may be a better way to do so already that I am not aware of; if so, please let me know.

What I am wanting to do is essentially be able to right click on an email in my spam folder and have an option of blacklisting that specific sender or entire domain from a drop down menu. Presently, as far as I know, I have to make note of the hundred or so domains that I am receiving spam from and enter them one at a time into the blacklist.

Does anyone have any better ways to manage this, or would a feature addition be required?