This is the most confusing thing I have ever read, and that includes anything in my programming class. The mail server starts sending emails to the bulletin from the "post master".....

You mean to all the subscribers of the bulletin, right?
No offense, but If I got 100 useless emails, I would still complain, regardless if everyone else got the same thing. Hell, if I didn't, it would likely happen again. Although, asking why they got is a given.
And I dunno where you have been, but with many spam mail, sending an email to stop more from coming is what you have to do....
Maybe I just don't have a sense of humor?