master.cf snippet

smtp             inet  n       -       -       -       -       smtpd
  -o cleanup_service_name=pre-cleanup

submission       inet  n       -       -       -       -       smtpd
  -o cleanup_service_name=pre-cleanup
  -o smtpd_tls_security_level=encrypt
  -o smtpd_sasl_auth_enable=yes
  -o smtpd_client_restrictions=permit_sasl_authenticated,reject

pickup           fifo  n      -       -       60       1       pickup
  -o cleanup_service_name=pre-cleanup

pre-cleanup      unix  n       -       -       -       0       cleanup
  -o virtual_alias_maps=

cleanup          unix  n       -       -       -       0       cleanup
  -o mime_header_checks=
  -o nested_header_checks=
  -o body_checks=
  -o header_checks=

smtp-amavis      unix  -       -       -       -       2       smtp
  -o smtp_data_done_timeout=1200
  -o smtp_send_xforward_command=yes
  -o disable_dns_lookups=yes
  -o max_use=20

127.0.0.1:10025  inet  n       -       -       -       -       smtpd
  -o content_filter=
  -o local_recipient_maps=
  -o relay_recipient_maps=
  -o smtpd_restriction_classes=
  -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 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