According to Google as of January 2013, its free email service Gmail has more than 425 million active users. If you are one of these users and want to see if your emails have been read, there is an easy way to check. Gmail enables you to see at a glance which emails in your inbox have been read by you; further, if you have a Google Apps for Business account, you can request read receipts to see if others have read the emails that you have sent them. Read receipts are not available for personal accounts, but you can get the same results using a browser extension. Warnings Writer Bio

Can You See if Emails Have Been Read on Gmail  - 24