Is it possible to have a scenario where there are 3 email addresses. Each on a different mail server.
Charlie writes an email with Alice and Bob listed as recepients. Charlie uses a rogue SMTP server
treyresearch.net that only carries out the SMTP transaction with Alice on the
contoso.com server while listing Bob as a recepient but does not carry out the SMTP transaction with the SMTP server for
Alice belives that Bob is aware of the content in the email whereas he certainly is not.
Is this a possible scenario with SMTP and are there any measures to prevent this?