I tested it by trying to bounce a message from a junk email account I sent to my primary email account, but I never received a bounce email saying that my account did not exist.
Using Gmail, I got the bounce feature in OS X Mail to work. Not an issue and for those folks who I want to think the address is no longer responding, it has worked as desired.
I tested it by trying to bounce a message from a junk email account I sent to my primary email account, but I never received a bounce email saying that my account did not exist.