Gmail is furthering its offline strategy today with the announcement of the ability to include attachments in composed emails when offline. Google says this was one of the most requested features for Offline Gmail and starting today, you be able to attach files in offline mode the way you would in online Gmail. You'll be able to attach all types of files except inline images, which are images in the body of the email. When you have Offline Gmail enabled, Google says that mail now goes through the outbox when you're online or offline, allowing Gmail to capture all attachments regardless of internet connections.