email sent to us every second basically shutting down our exchange server 2003

we have windows sbs 2003 with exchange server 2003 set up in our shop. we are getting hammered by some one in  japan with a email every second is what the log shows. how do i stop this from happening. we are virtually unable to send or receive our normal email. some email got to us today from a week ago.
nelddAsked:
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AdamRobinsonConnect With a Mentor Commented:
Go into the queues, freeze the ones unrelated to your domain.  Block the person from Japan, if it's a single IP (which you seem to be saying).  If you blocked their ability to send to your Exchange Server, you wouldn't still be receiving e-mail (if it's from the same IP address).

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serialbandCommented:
Can't you just Firewall off the remote IP of the problem mailserver?
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nelddAuthor Commented:
we have tryed that. email still not coming through got one from sunday today. in exchange we have 48000+ messages awating directory lookup. we installed antigen on this server also could teh problem be with it?.
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Mark PavlakCommented:
Have you tried freezing the que?
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nelddAuthor Commented:
that seemed to fix problem. there seems to be many smtp servers listed like yahoo and hotmail. i frozze them and turned off antigen. I will try to reload antigen
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AdamRobinsonCommented:
Let us know how it goes.
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nelddAuthor Commented:
EMAIL IS COMINT THROUGH FINE WITH ANTIGEN OFF. WE WILL UNISTALL IT AND REINSTALL THANKS GUYS
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