Orkut now to control email spamming:How to stop orkut mails

This was really important ie. having some check on loads of email we recieve daily because of ORKUT. Though I had created another account for this so I was not worried at all.
But recently google ie. Orkut really took some nice step.

Here is the list google provided :

#1 Until now, you’ve gotten a message whenever someone you invited as a friend has accepted your request. Now the default for this notification is off. If you’d like to change it, go to settings, then the notification settings tab and check the box next to “new friend approvals.”
#2 You receive a message when you’re invited to join a community. If you’re getting a lot of these, we figured you might like to turn it off. To do so go to the notification settings tab and and uncheck the boxes next to “community invite notifications.”
#3 To prevent unwanted spam, you can no longer send messages to ALL your orkut friends at once. Now that we improved our feature to group friends, we thought that you can start using them to address only those who you know will want to receive your message.
#4 Messages to communities will only exist for moderated communities. Many of us join these because we want to associate the name and picture of the community and have it on our profile, but we don’t want to participate actively. This is common, and we call these “badge communities.” Strangely, sometimes people think it’s a good idea to email ALL members of these (often huge and unmoderated) badge communities, which translates into a whole lot of spammy email.