Auch der beliebte SMTP-Server Postfix lässt sich relativ einfach dahingehend konfigurieren, dass die Emailempfänger vor Viren und Spam geschützt werden.
# /etc/postfix/master.cf
# virus scan filter (used by content_filter)
scan unix - - n - 16 smtp
-o smtp_send_xforward_command=yes
# For injecting mail back into postfix from the filter
127.0.0.1:10026 inet n - n - 16 smtpd
-o content_filter=
-o
receive_override_options=no_unknown_recipient_checks,no_header_body_checks
-o smtpd_helo_restrictions=
-o smtpd_client_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# /etc/postfix/main.cf
...
# virus scan
content_filter = scan:127.0.0.1:10025
receive_override_options = no_address_mappings
...# /etc/clamsmtpd.conf
OutAddress: 10026
Listen: 127.0.0.1:10025
ClamAddress: /var/run/clamav/clamd.ctl
TempDirectory: /var/spool/clamsmtp
PidFile: /var/run/clamsmtp/clamsmtpd.pid
User: clamsmtp# /etc/postfix/main.cf
...
# Greylisting
smtpd_recipient_restrictions =
permit_mynetworks
permit_sasl_authenticated
reject_unauth_destination
check_policy_service inet:127.0.0.1:10023
...# /etc/default/postgrey
POSTGREY_OPTS="--inet=10023 --delay=300"
POSTGREY_TEXT="Greylisted. Greylisting is used to filter spam and
viruses."# /etc/postfix/main.cf
...
# Spamassassin
milter_default_action = accept
smtpd_milters = unix:/var/spool/postfix/spamass/spamass.sock
...