/media/sda-magnetic/david/Extern-Magnetic-2022-06-29/Extern01/Dokumente-2020-11-16/disk10-ab-2020-01-10/02-debian-pc2-work/informatik/bash-programming/lex-yacc-bash-etc/mancf-bsp000008.txt

# client
# sender
# recipient
# hostname
# relay

smtpd_client_restrictions
smtpd_sender_restrictions
smtpd_recipient_restrictions
smtpd_relay_restrictions
smtpd_helo_restrictions
smtpd_data_restrictions
smtpd_etrn_restrictions
smtpd_end_of_data_restrictions

# client

reject_unknown_client
reject_unknown_client_hostname
reject_unknown_reverse_client_hostname

# unknown

reject_unknown_client
reject_unknown_client_hostname
reject_unknown_reverse_client_hostname
reject_unknown_sender_domain
reject_unknown_recipient_domain
reject_unknown_hostname

# domain 

reject_unknown_sender_domain 
reject_unknown_recipient_domain 

# sender 

reject_unknown_sender_domain

# recipient

# fqdn 

reject_non_fqdn_sender
reject_non_fqdn_recipient 
reject_non_fqdn_hostname

# unauth

reject_unauth_pipelining
reject_unauth_destination 

check_policy_service 

permit_mynetworks