The block button on Twitter is handy for getting rid of someone who fills your mentions with a bunch of noise. Now, there's a similar option for Gmail. Under the reply and forward options in Google's email app, there's now a block tool to quickly get rid of unwanted noise. Once you block a sender, messages will automatically go to your Spam folder. You can undo the action from the Settings menu, should the need arise. Block is ready to be put to work today on the desktop and it's set to arrive in the Android app over the course of the next week. What's more, the mobile software is also getting the handy unsubscribe feature that's already available on the web.