posted 16 years ago
The From address is used to send replies to; if it doesn't exist, of course the mail bounces.
Furthermore, the xyz.com domain exists; the people who run it might not like you messing around with it (not to mention that they might have set up a catch-all email account that would happily accept whatever you send there WITHOUT bouncing it).
[ May 15, 2008: Message edited by: Ulf Dittmer ]