I would like to know if this is possible to ask a SMTP Server if it received a specific email even if I’m not the server who sends the email ?
for instance, user [email protected] is sending an email to [email protected], then I have an independent server who is asking SMTP Server receiver.com if this email has been received (using Message-ID header value for instance)
I’ve seen that most of SMTP Servers are implementing DSN, but I don’t know if it can be asked by anybody….
As a third party, not either the sender nor recipient of the message, nothing in SMTP provides any way for a third party to find out the status or even existence of any message. That would be a horrible privacy violation, or worse.
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