The book may have addressed this, but the most important thing to remember about fake emails is that they can be traced. Regardless of what the address shows, the email can still be traced through IP information. Plus, if you choose to send it from a remote server, most newbies do not realize that the relay option on the SMTP server has to be set. Most are not.

BTW:

I once sent my ex GF's mother an email from the president. She's still convinced that I "hacked" the white house... I don't plan on ever telling her the truth, she finally started to respect me...