Why was an email delivered to my account even though I'm not
listed in the To or Cc list of addresses?  The content of an
email is actually completely independent of how the email is
delivered between computers on the internet. Thus, the addresses
you see on the To or Cc lines of an email do not necessarily
have any relation to who the email was actually delivered to.
Similarly, the From line of an email doesn't necessarily specify
who sent the email. They have nothing to do with the delivery
process.  All legitimate email software and systems do set the
To, Cc, and From lines of email to correspond with who the email
was sent from and to. Spam-sending software, however, will
usually forge the values.  Unfortunately, the email system was
designed back in the early days of the internet, when it was
simply used to send messages between trusted university
computers and no one had a need or reason to forge the headers.
How email is sent  If the actual content of the email doesn't
control where the email goes, wh