Add to black list/white list plugin

[LaurentR2D2]

Hello,

I'm using greylisting system for spam. Roundcube is the version shipped with Plesk 12. When I use Horde, I have the possibility to right click on messages and choose Add to blacklist or Add to whitelist to add the expeditor email to one list or the other. Is there a plugin which would allow me to do the same with Roundcube ?

Thank you