Help
Email trace
What it does
Answers "did that email actually arrive?" properly — where it went, whether it was delivered, blocked or bounced — and checks your domain is set up so your mail isn't landing in junk.
Try this
“Did my quote to the Hendersons actually get delivered Tuesday?”
What it needs
Owner access, or an owner giving you this specifically.
What it won't do
It shows delivery records, not the content of other people's messages.