Forwarding Emails
Emails can redirected to another email account. If you choose to redirect emails, make sure that you are able to login and collect emails at the alternative address.
Forwarding emails require no setup, you simply need to have another POP, IMAP or webmail account ready to receive these emails.
For the most part, you'll be able to see what email address the sender used, so you should be able to distinguish between direct and forwarded emails.