Receive Rejected posting to MAPSERVER-USERS@LISTS.UMN.EDU

[GotouYutaka]

I tried to post the list.
I recieved this message everytime.

Your message  is being returned to  you unprocessed because it  appears to 
have
already been distributed  to the MAPSERVER-USERS list. That is,  a message 
with
identical text  (but possibly with different  mail headers) has been  posted 
to
the list  recently, either by  you or  by someone else.  If you have  reason 
to
resend this message to the list (for instance because you have been notified 
of
a hardware failure with loss of data),  please alter the text of the message 
in
some way and resend  it to the list. Note that altering  the "Subject:" line 
or
adding blank lines at  the top or bottom of the message  is not sufficient; 
you
should  instead add  a  sentence or  two  at  the top  explaining  why you 
are
resending the  message, so that the  other subscribers understand why  they 
are
getting two copies of the same message.

why?

****************************************
yu.gotou at gtec-ni.com