submission/inet/smtpd_sasl_security_options=noanonymous
# this is a test comment, please don't delete me :'(
    # this is also a test comment, :O

# DMS must first process `postfix-master.cf` to `master.cf` when any custom parameters are from `postfix-main.cf`
# before an updated `main.cf` is read via `postconf`, otherwise without an existing reference the parameter is excluded.
submission/inet/smtpd_client_restrictions=$custom_parameter