My brother-in-law has forwarded an email conversation to me that was initiated by a request for the payment of an invoice that did not exist. The spam email appears to have come from his email address and was sent to people in his address book. I was wondering if someone could help me to recognise whether the spam email is a spoof or whether someone or something has managed to hack into the email account. I have no real experience of reading email headers so please be gentle.
Thank you in advance.