disable_vrfy_command = yes show_user_unknown_table_name = no smtpd_helo_required = yes smtpd_helo_restrictions= check_helo_access hash:/etc/postfix/helo_restrictions permit_mynetworks, permit_sasl_authenticated, reject_invalid_hostname, reject_non_fqdn_hostname, reject_invalid_helo_hostname, reject_unknown_helo_hostname smtpd_sender_restrictions= reject_non_fqdn_sender, reject_unknown_sender_domain, reject_unlisted_sender, permit_mynetworks, permit_sasl_authenticated smtpd_recipient_restrictions= check_sender_access hash:/etc/postfix/sender_access reject_non_fqdn_recipient, reject_unknown_recipient_domain, reject_unlisted_recipient, permit_mynetworks, permit_sasl_authenticated, reject_unauth_destination reject_invalid_hostname smtpd_data_restrictions= reject_unauth_pipelining, reject_multi_recipient_bounce smtpd_etrn_restrictions= permit_mynetworks, permit_sasl_authenticated, reject message_size_limit = 51200000