master.cf

smtp      inet  n       -       -       -       1       postscreen
smtpd     pass  -       -       -       -       -       smtpd
  -o smtpd_proxy_filter=inet:[127.0.0.1]:10024 # <--------- Amavis port
  -o smtpd_proxy_options=speed_adjust
dnsblog   unix  -       -       -       -       0       dnsblog

tlsproxy  unix  -       -       -       -       0       tlsproxy
submission inet n       -       -       -       -       smtpd
  -o syslog_name=postfix/submission
  -o smtpd_tls_security_level=encrypt
  -o tls_preempt_cipherlist=yes
  -o smtpd_sasl_auth_enable=yes
  -o smtpd_reject_unlisted_recipient=no
  -o smtpd_client_restrictions=permit_sasl_authenticated,reject
  -o smtpd_helo_restrictions=
  -o smtpd_sender_restrictions=reject_sender_login_mismatch
  -o smtpd_recipient_restrictions=
  -o milter_macro_daemon_name=ORIGINATING
  -o smtpd_proxy_filter=inet:[127.0.0.1]:10026  # <--------- Amavis originating port

# Amavis return path
#
127.0.0.1:10025 inet n    -       n       -       -     smtpd
        -o content_filter=smtp:[127.0.0.1]:2526  # <--------- ESET Mail security
         -o smtpd_authorized_xforward_hosts=127.0.0.0/8
        -o smtpd_delay_reject=no
        -o smtpd_client_restrictions=permit_mynetworks,reject
        -o smtpd_helo_restrictions=
        -o smtpd_sender_restrictions=
        -o smtpd_recipient_restrictions=permit_mynetworks,reject
        -o smtpd_data_restrictions=reject_unauth_pipelining
        -o smtpd_end_of_data_restrictions=
        -o smtpd_restriction_classes=
        -o mynetworks=127.0.0.0/8
        -o smtpd_error_sleep_time=0
        -o smtpd_soft_error_limit=1001
        -o smtpd_hard_error_limit=1000
        -o smtpd_client_connection_count_limit=0
        -o smtpd_client_connection_rate_limit=0
        -o receive_override_options=no_header_body_checks,no_unknown_recipient_checks
        -o local_header_rewrite_clients=

# ESET return path
#
127.0.0.1:2525 inet n    -       n       -       -     smtpd
        -o content_filter=
        -o smtpd_client_restrictions=permit_mynetworks,reject
        -o smtpd_helo_restrictions=
        -o smtpd_sender_restrictions=
        -o smtpd_recipient_restrictions=permit_mynetworks,reject
        -o mynetworks=127.0.0.0/8