Install ClamAntiVirus

# apt-get install clamav

Add user and group :

# adduser clamav amavis

Adding user `clamav’ to group `amavis’ …
Adding user clamav to group amavis
Done.

# adduser amavis clamav

Adding user `amavis’ to group `clamav’ …
Adding user amavis to group clamav
Done.