Postfix + Clamav + Amavisd

Postfix + Clamav + Amavisd 2014/09/26

	Configure Virus-Scanning with Postfix + Clamav.
[1]	Install Clamav, refer to here.
[2]	Install Amavisd and Clamav Server, and start Clamav Server first.

# install from EPEL [root@mail ~]#  yum --enablerepo=epel -y install amavisd-new clamav-server clamav-server-systemd [root@mail ~]#  cp /usr/share/doc/clamav-server*/clamd.sysconfig /etc/sysconfig/clamd.amavisd  [root@mail ~]#  vi /etc/sysconfig/clamd.amavisd # line 1, 2: uncomment and change CLAMD_CONFIGFILE=/etc/clamd.d/ amavisd.conf CLAMD_SOCKET=/var/run/ clamd.amavisd /clamd.sock [root@mail ~]#  vi /etc/tmpfiles.d/clamd.amavisd.conf # create new d /var/run/clamd.amavisd 0755 amavis amavis - [root@mail ~]#  vi /usr/lib/systemd/system/clamd@.service # add follows to the end [Install] WantedBy=multi-user.target [root@mail ~]#  systemctl start clamd@amavisd  [root@mail ~]#  systemctl enable clamd@amavisd  ln -s '/usr/lib/systemd/system/clamd@.service' '/etc/systemd/system/multi-user.target.wants/clamd@amavisd.service'

[3]	Configure Amavisd.

[root@mail ~]#  vi /etc/amavisd/amavisd.conf # line 20: change to the own domain name $mydomain = ' server.world '; # line 152: change to the own hostname $myhostname = ' mail.server.world '; # line 154: uncomment $notify_method = 'smtp:[127.0.0.1]:10025'; $forward_method = 'smtp:[127.0.0.1]:10025'; [root@mail ~]#  systemctl start amavisd  [root@mail ~]#  systemctl enable amavisd  [root@mail ~]#  systemctl start spamassassin  [root@mail ~]#  systemctl enable spamassassin

[4]	Configure Postfix.

[root@mail ~]#  vi /etc/postfix/main.cf # add follows to the end content_filter=smtp-amavis:[127.0.0.1]:10024 [root@mail ~]#  vi /etc/postfix/master.cf # add follows to the end smtp-amavis unix - - n - 2 smtp -o smtp_data_done_timeout=1200 -o smtp_send_xforward_command=yes -o disable_dns_lookups=yes 127.0.0.1:10025 inet n - n - - smtpd -o content_filter= -o local_recipient_maps= -o relay_recipient_maps= -o smtpd_restriction_classes= -o smtpd_client_restrictions= -o smtpd_helo_restrictions= -o smtpd_sender_restrictions= -o smtpd_recipient_restrictions=permit_mynetworks,reject -o mynetworks=127.0.0.0/8 -o strict_rfc821_envelopes=yes -o smtpd_error_sleep_time=0 -o smtpd_soft_error_limit=1001 -o smtpd_hard_error_limit=1000 [root@mail ~]#  systemctl restart postfix

[5]	It' OK all. These lines below are added in the header section of emails after this configuration and emails with known Virus will not sent to Clients.