Here, I working in Private Message System and Invite module in Organic Groups in Drupal Commons.Here I get listed with trusted content using view and need to set private Message button for bulk operation just like this Drupal 6 Module. Kindly guide me how to get private Message with Bulk operation or any other module for drupal 7.

Here I created Email System with bulk operation via external mail system.

"User can invite friends and send email using VBO module "

But my need to send mail/message internal system like Private Message system for bulk trusted contact !! How to achieve this !! kindly guide me..