Can you track emails if you did not first request a read receipt?

[Guest]

I am trying to figure out if you can track the read status or delivery of an
email if you did not originally request a read receipt. Can anyone help?
Thanks.

 

[Guest]

Hi,
You can use a third party service ,
http://www.confirm.to/confirm.to/en/indexsub.html
Rgrds,