Share with your network!
Google announced last week via a post on their Groups Announcement Page that they are removing the 'Add members directly' option within the service. This feature allowed Groups to be created and email addresses added without requiring any confirmation from the recipient, and not surprisingly this was heavily abused by spammers.
We are happy to note this positive change to the Google Groups service and hope to see a drop in the volume of spam coming from the Groups IP ranges, in the coming months.