General rate: Negative
Send an email to youself. Bounce it. See if you get a bounce message. If you don't, do they?

General rate: Positive
Certainly worked for me. tried it with my own e-mail address

General rate: Negative
This program is worthless. Spammers always use spoofed addresses so you are only bouncing email to a person who didn't send it in the first place. Not worth your time or computer resources.

General rate: Positive
It is understood that this would be useless against the usual spam transmitted blindly by infected zombie computers. What this is particularly good for "spamletters" and repeat ads from spammers such as constantcontact, etc. So rather than a substitute for spamcop, etc. this performs the simple function of saying "nobody home". That *is* useful.

General rate: Negative
Tried bouncing back to myself and it wouldn't work. Tried manually entering my ISPs DNSs ... still didn't work. It just doesn't work! Is there anything equivalent out there that does????