Mail Server Responding Slowly.

hi all
i want some help regarding mail server in
my company we are running
send mail and squirrel server, now prb is that
as some virus came over internet wid name MyDoom over windows box so lots of
mass-mailing is generating on our company server and all the machine in
office is been fixed up of windows box still emails are comming from unknown
email addresses and due to mass-mailing mail server is responding very
slow
as in mail receiving/sending is gettin delay due to heavt traffic
over mail server so i dont know wat to do .. wat should i do now cuz my mind
isnt working how can i stop this mass mailing and due to this our buisness
going down and down everyday. So please guide me wat should i do ?? i really
need help badly, please help me out ...

Regards
Ali

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