clamav-milter 0.97+dfsg-2ubuntu1 (amd64 binary) in ubuntu natty

 Clam AntiVirus is an anti-virus toolkit for Unix. The main purpose of
 this software is the integration with mail servers (attachment
 scanning). The package provides a flexible and scalable
 multi-threaded daemon in the clamav-daemon package, a command-line
 scanner in the clamav package, and a tool for automatic updating via
 the Internet in the clamav-freshclam package. The programs are based
 on libclamav6, which can be used by other software.
 .
 This package contains the ClamAV milter for use with sendmail. It can
 be configured to be run either standalone, or using clamav-daemon.