PDR said:
I send messages with the read request option selected but when I check the
tracking there is no documented receipt. Does the receiver have to agree for
the tracking to list the receipt?
All you can do is *request* the recipient send back a new e-mail which
acknowledges they received your e-mail (i.e., the read receipt). You can't
force them to send you one. They can configure their e-mail client to
always send read receipts, prompt when one has been requested, or always
ignore them. The default is to prompt, and it doesn't take too many prompts
for the user to get nuisanced into configuring their tracking option to set
"Always ignore" for read receipt requests.
The read receipt request is a header that gets added into your outbound
e-mail. Only e-mail clients that understand that header can do anything
about it but the user still gets to configure their e-mail client regarding
how it handles that header.
Unless you are in a corporate environment where policies dictate that all
employees must enable read receipt handling, you have no way to force the
recipient to send you a read receipt (which is a new e-mail to send back the
acknowledge). Some ISPs, e-mail providers, and spam filters will strip out
the delivery/status headers. Users configure their e-mail clients to ignore
the delivery headers. So expect very little usefulness from requesting read
reciepts. You're not going to get many, if any.