I've never bothered with trackers or even Read Receipts.
Like snail mail, an email is legally deemed to to received once it's been sent.
They can't say they never got it if you have proof you sent it.
No email is undelivered, if it can't be sent it is returned to sender.
I disagree
I have sent email requests to my Doctor for repeat prescriptions,
and he never received them because of I.T. problems in the N.H.S. which failed to place them in the doctor's in-box.
So far as the Internet was concerned - the message had been delivered,
and I never knew of the failure
Now I email my local pharmacy, and that one action causes them to to do many things :-
1.
Forward my request direct to the doctors office BY FAX,
because the Pharmacy FAX machine gets a response back from the doctors FAX as soon as the message is printed, and
A FAX RECEIPT IS LEGAL PROOF OF DELIVERY.
2.
They then email to say that it has happened (as I also request because they are part of a chain and subject to the same vagaries of remote I.T. as the N.H.S.)
and if I do not get their response within a couple of hours I try again or phone them.
3.
When the doctor has signed the prescription they then collect his authorization and deliver my needs to my door
( The internet would make me fat and lazy if I let it
)
Incidentally, a FAX message is authenticated by the telephone that sent it.
A solicitor dealing with a will required my wife's "signed instruction" to release funds,
needing a 200 mile journey to his office, or a snail mail postal letter, or a FAX
but email lacked authentication and could not be accepted.
The hidden pixel solution used by KAS causes the entire email top be rejected by some spam filters,
and I think that for all their failings, the N.H.S would have rejected ALL my emails if they had included tracking pixels.
I would like to think that my security system would prevent the activation of a pixel from launching some action,
How is that different from visiting an infected website that uses hidden pixels to signal to Windows that the user consented to an installation ?