Clamav

Configure SMTP Server in order to scan emails to protect from virus or spams. Install clamav first.

[root@mail ~]# yum –enablerepo=dag -y install clamd amavisd-new # install from DAG
[root@mail ~]# vi /etc/amavisd.conf
# line 21: specify domain name
$mydomain = ‘server.world’;
# line 119: make it comment (not notify if virus detected)
#$virus_admin = “virusalert\@$mydomain”;
# line 152: uncomment and specify FQDN
$myhostname = ‘mail.server.world’;
# line 154: uncomment
$notify_method = ‘smtp:[127.0.0.1]:10025’;
$forward_method = ‘smtp:[127.0.0.1]:10025’;
# line 157: uncomment thease 4 lines
$final_virus_destiny= D_DISCARD;
$final_banned_destiny= D_BOUNCE;
$final_spam_destiny= D_BOUNCE;
$final_bad_header_destiny = D_PASS;
# line 363: uncomment thease 4 lines
[‘ClamAV-clamd’,
\&ask_daemon, [“CONTSCAN {}\n”, “/var/run/clamav/clamd.sock”],
qr/\bOK$/m, qr/\bFOUND$/m,
qr/^.*?: (?!Infected Archive)(.*) FOUND$/m ],
[root@mail ~]# vi /etc/postfix/main.cf
# add at the bottom
content_filter=smtp-amavis:[127.0.0.1]:10024
[root@mail ~]# vi /etc/postfix/master.cf
# add at the bottom
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 ~]# /etc/rc.d/init.d/clamd start
Starting Clam AntiVirus Daemon: Bytecode: Security mode set to “TrustSigned”.
[ OK ]
[root@mail ~]# /etc/rc.d/init.d/amavisd start
Starting Mail Virus Scanner (amavisd): [ OK ]
[root@mail ~]# /etc/rc.d/init.d/spamassassin start
Starting spamd: [ OK ]
[root@mail ~]# /etc/rc.d/init.d/postfix restart
Shutting down postfix: [ OK ]
Starting postfix: [ OK ]
[root@mail ~]# chkconfig amavisd on
[root@mail ~]# chkconfig spamassassin on
[root@mail ~]# chkconfig clamd on