Do you want to make sure that people get your emails?Outlook delivery and read receipts will notify you when your message is delivered and opened.
But if you are constantly prompted to send a read receipt for every message you receive, one day it may set your nerves on edge. The read receipt request in Outlook 2013 looks like on the following screenshot.
Note: The request message displays only if you double-click the email to open it.
Note: Email tracking services can't give you 100% guarantee that your email was read.
They can only track HTML messages (not plain text ones).
All URL-shorteners (for example, bit.ly) can track your clicks.
The message can also contain a tracking image, so when you upload the image it can activate a tracking code and it'll become clear that the email is opened.There is another way to block read receipt requests.Tip: Pay attention to the links that you click in the emails you receive.So when you get the delivery receipt it shows that the message successfully reached the intended email server.It doesn't guarantee that the email is in the recipient's inbox.The most well-known are getnotify.com, didtheyreadit.com, When you are ready to send your message, you just add the tracking service address to the recipient's email address, and your message turns out to be automatically and invisibly tracked.