/media/sda-magnetic/david/Dok-15-2023-11-27/fernuni-hagen/cs-i-ii/old-cs-2-01/informatik2/bash-programming/lex-yacc-bash-etc/mancf-bsp000013.txt

# client
# sender
# recipient
# hostname
# relay

smtpd_client_restrictions
smtpd_helo_restrictions
smtpd_sender_restrictions
smtpd_recipient_restrictions
smtpd_relay_restrictions
smtpd_data_restrictions
smtpd_end_of_data_restrictions
smtpd_etrn_restrictions

permit_my_networks
check_policy_service

# hostname 

reject_unknown_client
reject_unknown_client_hostname
reject_unknown_reverse_client_hostname
reject_unknown_hostname
reject_unknown_sender_domain
reject_unknown_helo_hostame
reject_unknown_recipient_domain

# non_fqdn

reject_non_fqdn_sender
reject_non_fqdn_recipient
reject_non_fqdn_hostname

# unauth

reject_unauth_destination
reject_unauth_sender_domain


reject_invalid_hostname