Since some people cannot read other people's responses...I'll try once more:
Requested by thousands of Gmail users, since 2008...Ignored by Google :-(
Maybe you can try Boomerang or RightInbox...they both claim they can do it!
For a fee, if you do it too often!
Or try MailTracker which is part of Gmail...
https://chrome.google.com/webstore/detail/mailtrack-for-gmail/ndnaehgpjlnokgebbaldlmgkapkpjkkb?hl=en
Or just do a Google Search...you'll be surprised of all the solutions out there!
BTW:
In case you think someone from Google monitors this forum or this is a popularity contest, take a look at:
https://groups.google.com/forum/#!topic/gmail-labs-suggest-a-labs-feature/Wz55gyU03h4
So, keep on asking/+1/begging/pleading/cajoling/threatening, you never know...BUT, don't hold your breath :-)