Google today announced Gmail allows users to send attachment up to 10GB after integrating with Google Drive, the attachment size can be 400 times larger than traditional mail attachment size.Google also added another feature recently, it will pop up a separate window when writing new email. The integration of Gmail with Google Drive will introduce one Google Drive button at the bottom of the popup window, as a solution for sending large attachment.At the same time, because the attachment will be stored in the cloud of Google Drive, Gmail will check again to confirm whether the real recipient c...