Mail Server : Postfix + Clamav + Amavisd2022/03/18 |
Configure Virus-Scanning for EMails with Postfix + Clamav.
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[1] | |
[2] | Install Amavisd and Clamav Server. |
# install from EPEL and CRB [root@mail ~]# dnf --enablerepo=epel,crb -y install amavisd-new clamd perl-Digest-SHA1 perl-IO-stringy
[root@mail ~]#
vi /etc/clamd.d/scan.conf # line 8 : comment out # Example
# line 14 : uncomment LogFile /var/log/clamd.scan # line 77 : uncomment PidFile /var/run/clamd.scan/clamd.pid # line 81 : uncomment TemporaryDirectory /var/tmp # line 96 : uncomment LocalSocket /var/run/clamd.scan/clamd.sock touch /var/log/clamd.scan [root@mail ~]# chown clamscan. /var/log/clamd.scan [root@mail ~]# systemctl enable --now clamd@scan |
[3] | If SELinux is enabled, add rules to start Clamav Server like follows. |
[root@mail ~]# restorecon -v /var/log/clamd.scan [root@mail ~]# setsebool -P antivirus_can_scan_system on |
[4] | Configure Amavisd. |
[root@mail ~]#
vi /etc/amavisd/amavisd.conf # line 23 : change to the own domain name $mydomain = ' srv.world ';
# line 158 : uncomment and change to the own hostname $myhostname = ' mail.srv.world ';
systemctl enable --now amavisd |
[5] | Configure Postfix. |
[root@mail ~]#
vi /etc/postfix/main.cf # add follows to last line content_filter=smtp-amavis:[127.0.0.1]:10024
[root@mail ~]#
vi /etc/postfix/master.cf # add follows to last line 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 systemctl restart postfix |
[6] | That' OK all. [X-Virus-Scanned: ***] lines are added in the header section of emails after this configuration and emails with known Virus will not sent to Clients like following email logs. |
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