How do I track read receipts if recipient has function turned off?

[Guest]

We need to be able to track read receipts when emailing billing information
to our students. Since they can globally set the read receipt option to
"Never send a response," is there any other way to track whether or not they
have received and/or opened the email correspondence?

 

[Guest]

Hi,
You can do this by using a service like the one attached.
http://www.confirm.to/confirm.to/en/indexsub.html
Regards,