/media/sda-magnetic/david/Dokumente-15/fernuni-hagen/cs-i-ii/old-cs-2-03/bash-programming/lex-yacc-bash-etc/mancf-bsp000010.txt

# client
# sender
# recipient
# hostname

# invalid
# unknown
# non_fqnd
# unauth

smtpd_client_restrictions
smtpd_sender_restrictions
smtpd_recipient_restrictions
smtpd_helo_restrictions
smtpd_etrn_restrictions
smtpd_data_data_restrictions
smtpd_end_of_data_restrictions

reject_unknown_client
reject_unknown_client_hostname
reject_unknown_reverse_client_hostname
reject_unknown_sender_domain
reject_unknown_recipient_domain
reject_unknown_helo_hostname

reject_invalid_hostname
reject_non_fqdn_hostname
reject_non_fqdn_client
reject_non_fqdn_recipient

reject_unauth_pipelining
reject_unauth_destination

check_policy_servce

permit_my_networks