clamav     - Antivirus scanner for Unix
 clamav-base - Base package for clamav, an anti-virus utility for Unix
 clamav-daemon - Powerful Antivirus scanner daemon
 clamav-freshclam - Downloads clamav virus databases from the Internet
 clamav-milter - Fast antivirus scanner for sendmail
 clamav-testfiles - Use these files to test that your Antivirus program works
 libclamav1 - Virus scanner library
 libclamav1-dev - Clam Antivirus library development files

ClamAV: How to check

sudo apt-get -s dist-upgrade | less
sudo apt-get dist-upgrade

# If that result doesn't look like fixing your problem
sudo apt-get -sf install | less

ClamAV: Try to re-install

# cleanup
apt-get -y remove clamav*
sudo apt-get clean -y
sudo apt-get autoremove -y
rm -Rf /var/cache/apt/*
rm -Rf /etc/clamav

#re-install
sudo apt-get update
sudo apt-get dist-upgrade
apt-get -y install clamav-freshclam
apt-get -y install clamav-milter clamav-daemon

Postfix: How to recover ClamAV broken install on Debian

#
# sudo apt-get install --reinstall clamav-daemon
# 
sudo rm -Rf /var/cache/apt/archives/*
sudo apt-get remove -y apparmor* clamav*
sudo dpkg --remove clamav clamav-base clamav-freshclam
sudo apt-get autoremove -y
sudo apt-get update -y -o Acquire::ForceIPv4=true
sudo apt-get upgrade -y -o Acquire::ForceIPv4=true
sudo apt-get dist-upgrade -y -o Acquire::ForceIPv4=true
sudo apt-get autoclean -y
sudo apt-get clean -y
sudo apt-get check -y
#
sudo mkdir /var/run/clamav
touch /var/run/clamav/clamav-milter.pid
sudo chown -R clamav:root /var/run/clamav
#
sudo apt-get update
sudo apt-get dist-upgrade
sudo apt-get install -y clamav clamav-base clamav-freshclam clamav-milter clamav-docs
sudo dpkg --configure -a
sudo apt --fix-broken install
#

Postfix: How to recover Clamav systemctl on Debian

#
systemctl list-unit-files | grep clam
#
sudo systemctl unmask clamav-daemon.service
sudo systemctl unmask clamav-freshclam.service
sudo systemctl unmask clamav-milter.service  
#
systemctl show clamav-daemon.service 
systemctl show clamav-freshclam.service 
systemctl show clamav-milter.service 
#
/usr/sbin/clamd --foreground=true
/usr/bin/freshclam -d --foreground=true
/usr/sbin/clamav-milter --config-file=/etc/clamav/clamav-milter.conf
#

• DNSBL (DNS BlackList aka RBL) lookup and FCrDNS (Forward Confirmed reverse DNS aka iprev) check tool.
  valli: http://multirbl.valli.org

• To be removed from barracudacentral blacklist please visit:
  http://www.barracudacentral.org/rblremoval-request/$rbl_what
• To be removed fromspamhaus blacklist please visit:
  http://www.spamhaus.org/query/bl?ip=$rbl_what

DNSBL Providers:

• PostFix: http://www.postfix.org
• SpamTEQ: https://www.spamhaustech.com
• DNSBL: https://www.dnsbl.info
• Spameatingmonkey: https://spameatingmonkey.com