Repeating messages

Chances are, SMTP being the creature it is, some mail server along 
the way has hiccoughed your mail out a few times over a period of 
time. It's either that, a problem at the mail client end doing the 
same thing, or a problem in the listserver. I think those are listed 
in order of likelihood.... with the mail server issue being perhaps 
the most likely. 

Tomb.