I wish to disable the envelope icon in 11.10's menu bar. I do not want to remove it permanently from the computer.
With previous versions, I could right-click those type icons to make them go away, but I cannot find out how to do that in 11.10.
The easiest way to disable the envelope I know is by uninstalling the indicator wich is no big deal as you can revert your changes in the same easy way.
sudo apt-get remove indicator-messages
to remove the indicator.
sudo apt-get install indicator-messages
to get it back again.