> Frankly it is a diabolical practise, causes uneccessary and pointless > mail. If a mail is so important that you *must* be certain it has been > read then phone the person up. Since the mechanism is inherently > unreliable anyway, what is the point of using it ?
Exactly. Every now and then, I have to remove undeliverable notification receipts from the mail queue. Undeliverable, because the original mails apparently underwent some internal->external address rewriting, but the address in the DSN header was not rewritten.
