PREIN

/bin/sh

/usr/share/rpm-helper/add-user amavis-postfix $1 amavis /var/spool/amavis /bin/false 
/usr/share/rpm-helper/add-group amavis-postfix $1 amavis amavis

POSTIN

/bin/sh

grep -q "virusalert" /etc/aliases || \
	echo "virusalert:\troot" >> /etc/aliases