duplicate msgs when delivery through commandprompt.com

Can anyone do something about the duplicate messages from the list?

It seems to be delivering twice from svr1.postgresql.org to
commandprompt.com (the timestamps on the received headers are the same
up until that point). Delivering to hosting.commandprompt.com doesnt
seem to duplicate. Nor does srv4.postgresql.org.

latest example

For message Message-ID: <41C9F4F7(dot)5090309(at)visualdistortion(dot)org>

Received: from postgresql.org (svr1.postgresql.org [200.46.204.71])
by commandprompt.com (8.12.8/8.12.8)
with ESMTP id iBMMYMle007187; Wed, 22 Dec 2004 14:38:13 -0800

and

Received: from postgresql.org (svr1.postgresql.org [200.46.204.71])
by commandprompt.com (8.12.8/8.12.8)
with ESMTP id iBMMgjlY007311; Wed, 22 Dec 2004 14:42:46 -0800

klint.

+---------------------------------------+-----------------+
: Klint Gore : "Non rhyming :
: EMail : kg(at)kgb(dot)une(dot)edu(dot)au : slang - the :
: Snail : A.B.R.I. : possibilities :
: Mail University of New England : are useless" :
: Armidale NSW 2351 Australia : L.J.J. :
: Fax : +61 2 6772 5376 : :
+---------------------------------------+-----------------+