Postfix + Clamav - ClamSMTP2014/08/22

	Configure Virus-Scanning with Postfix + Clamav.
[1]	Install Clamav, refer to here.
[2]	Install Clamd and Clamsmtp.

# install from EPEL

[root@mail ~]#

yum --enablerepo=epel -y install clamd clamsmtp

[root@mail ~]#

vi /etc/clamsmtpd.conf

# line 22: uncomment

Listen: 0.0.0.0:10025

# line 28: uncomment

Header: X-Virus-Scanned: ClamAV using ClamSMTP

# line 34: uncomment

Action: drop

[root@mail ~]#

/etc/rc.d/init.d/clamsmtpd start

Starting ClamSmtpd:                  [  OK  ]

[root@mail ~]#

/etc/rc.d/init.d/clamsmtp-clamd start

Starting clamd.clamsmtp:             [  OK  ]

[root@mail ~]#

chkconfig clamsmtpd on

[root@mail ~]#

chkconfig clamsmtp-clamd on

[3]	If SELinux is enabled, change rules to start Clamd.

[root@mail ~]#

setsebool -P antivirus_can_scan_system on

[root@mail ~]#

setsebool -P antivirus_use_jit on

[4]	Configure Postfix.

[root@mail ~]#

vi /etc/postfix/main.cf

# add follows to the end

content_filter = scan:127.0.0.1:10025

[root@mail ~]#

vi /etc/postfix/master.cf

# add follows to the end

scan unix -       -       n       -       16       smtp
   -o smtp_data_done_timeout=1200
   -o smtp_send_xforward_command=yes
   -o disable_dns_lookups=yes
127.0.0.1:10026 inet n       -       n       -       16       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_style=host
   -o smtpd_authorized_xforward_hosts=127.0.0.0/8

[root@mail ~]#

/etc/rc.d/init.d/postfix restart

Shutting down postfix:                  [  OK  ]
Starting postfix:                       [  OK  ]

These lines below are added in header section of emails after this configuration and emails with known Virus will not sent to Clients.

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