Yes. It is not reliable to request delivery notification by message
header as this is not a standard approach and client/recipient
dependent. With number of trials, using SMTP "RCPT TO:" command is more
reasonable.
Remy Lebeau (TeamB) wrote:
>
> "Massuda" <massuda@mailinator.com> wrote in message
> news:45198ef5$3@newsgroups.borland.com...
>
> > Can I use the header "Return-Receipt-To" for this purpose
> > (delivery notification)?
>
> That is entirely dependant on the particular server that is receiving
> the message. "Return-Receipt-To" is not a standard header, and it is
> not specifically a delivery notification header either. Many servers
> do not use it as a delivery notification. If they use it at all, it
> is used as a read notification instead. Some servers do not use it
> at all.
>
>
> Gambit
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