[Mailman-Users] How to remove/stop posts already sent to the list?

[Horvath Gabor (hwg)]

    HG> I accidentally posted to my list (Mailman 1.1) 10 copies of a
    HG> message.

Anybody else remember how Mailman 1.1 worked? ;}

[hwg]  okay, it's old, but how does it work in newer versions? 
I need a clue how I can remove messages that the list began to send. 
Or in another way, what would you (as a mailman admin) do, if your messanger got crazy, and posted ten copies of your message to a list? 

hwg