Following mail template can be used as DMCA notice, adjust to your needs.
Subject: DMCA/Copyright Infringement Notice
Dear Sir or Madam:
A website hosted by your company on publishing system having the host name ?OFFENDING SITES HOSTNAME (eg. vps.sh.servebyte.com)? and the IP address OFFENDING WEBSITE IP ADDRESS, infringes upon our exclusive rights in a number of copyrighted works. [...]