I’m amazed at the number of questions I get that boil down to people not trusting each other. Not that there isn’t cause, I suppose, with spam, phishing, and viruses running all over the place. But this seems like the simplest case of all – was your email read or not?
The answer to your question is no, there is no way to tell for sure that your email has been delivered or has been read.
I always get a lot of pushback on that.