In my office, we have about 4 four computers used by all employees as common
PCs. I have got outlook exchange and pop server configured on all of these
machines. Sometimes when I log into a different machines, all the mails (I am
not sure of the cut-off line), which I have downloaded once on one PC, get
downloaded again on the different PC. Thus everytime I hit the send-receive
button, I get multiple - 2/3 copies of about 30-80 mails.

Any explanation and solution?

Thanks in advance.
****al