It looks like our Server might have been infected was flagged for having sent spam eMails. So it needs to be scanned for malware and secured to prevent further problems.
It is a dedicated server runnig Linux and Webmin (No Cpanel)
I'm attaching the Spamcop Message
Only professionals please no freelancer and atleast 95% compeltion rate, Also I am not interested in working with anybody from India.