You may have just purchased Office 2016 or you may have an Office 365 subscription and it automatically upgraded Outlook for you and now Google Apps Sync no longer works. You would like to setup sync between Google Apps and MS Outlook 2016.
View More How to setup sync between MS Outlook 2016 and Google Apps
As its name suggests, Undo Send gives you a set period of time after dispatching an email to change your mind — so once you’ve clicked “Send” you’ll see an option to reverse it on your screen for between 5 and 30 seconds, depending on what you’ve indicated in the settings.
View More Undo send in Gmail – now available