In 1993, I had a summer internship at Apple.  After I returned to the university that fall, I sent a fake email from Andy Grove (the CEO of Intel at the time) to my new friend at Apple.<p>I did this just by opening a telnet session to the SMTP port at apple.com and manually typing in SMTP commands and associated text.<p>Apple&#x27;s SMTP server happily delivered a fake email from agrove@intel.com from a system at ucdavis.edu.<p>Lol, those were the days....