clamav in CentOS

vi /etc/yum.repos.d/dag.repo

[dag]
name=Dag RPM Repository for Red Hat Enterprise Linux
baseurl=http://apt.sw.be/redhat/el$releasever/en/$basearch/dag
gpgcheck=1
enabled=1

# clamav client
yum install clamav.x86_64

#clamav server
yum install clamav-server

## Error
CentOS-Yum: warning: rpmts_HdrFromFdno: Header V3 DSA signature: NOKEY, key ID 6b8d79e6

Try:
wget http://dag.wieers.com/packages/RPM-GPG-KEY.dag.txt && rpm -import RPM-GPG-KEY.dag.txt

Reference:
CentOS unofficial repository configure
CentOS virusscan 配置
ClamAV with sendmail
http://dag.wieers.com/rpm/FAQ.php#B