/media/sda-magnetic/david/Extern-Magnetic-2022-06-29/Extern01/Dokumente-2021-05-8/disk10-ab-2020-01-10/02-debian-pc2-work/informatik/bash-programming/lex-yacc-bash-etc/mancf-bsp000009.txt

# client
# sender
# recipient
# relay
# hostname
# helo

smtpd_client_restrictions
smtpd_helo_restrictions
smtpd_sender_restrictions
smtpd_recipient_restrictions
smtpd_relay_restrictions
smtpd_data_restrictions
smtpd_end_of_datat_restrictions
smtpd_etrn_restrictions

permit_my_networks
reject_unknown_client
reject_unknown_client_hostname
reject_unknown_reverse_client_hostname

reject_unknown_helo_hostname
reject_invalid_hostname
reject_unknown_sender_domain
reject_unknown_recipient_domain

reject_unknown_hostname
reject_non_fqdn_sender
reject_non_fqdn_hostname
reject_non_fqdn_recipient

check_policy_service
reject_unauth_pipelining
reject_unauth_destination