postconf -n:
alias_database =
alias_maps =
append_dot_mydomain = no
biff = no
broken_sasl_auth_clients = yes
config_directory = /etc/postfix
debug_peer_list = <my ip>
inet_interfaces = all
inet_protocols = all
mailbox_size_limit = 0
mydestination =
myhostname = mta.example.com
mynetworks = 127.0.0.0/8 [::ffff:127.0.0.0]/104 [::1]/128
myorigin = /etc/mailname
readme_directory = no
recipient_delimiter = +
relay_domains = ldap:/etc/postfix/ldap-domains.cf
relay_recipient_maps = ldap:/etc/postfix/ldap-aliases.cf
relay_transport = smtp:mua.example.com:25
relayhost =
smtp_tls_note_starttls_offer = yes
smtp_tls_security_level = may
smtp_tls_session_cache_database = btree:${data_directory}/smtp_scache
smtpd_banner = $myhostname ESMTP $mail_name (Ubuntu)
smtpd_recipient_restrictions = permit_sasl_authenticated,permit_mynetworks,reject_unauth_destination
smtpd_sasl_auth_enable = yes
smtpd_sasl_local_domain =
smtpd_sasl_security_options = noanonymous
smtpd_tls_CAfile = /etc/ssl/certs/cacert.pem
smtpd_tls_auth_only = no
smtpd_tls_cert_file = /etc/ssl/certs/smtpd.crt
smtpd_tls_key_file = /etc/ssl/private/smtpd.key
smtpd_tls_loglevel = 1
smtpd_tls_received_header = yes
smtpd_tls_security_level = may
smtpd_tls_session_cache_database = btree:${data_directory}/smtpd_scache
smtpd_tls_session_cache_timeout = 3600s
smtpd_use_tls = yes

	ldap-domain.cf:
bind = no
version = 3
timeout = 20

server_host = localhost
search_base = dc=example,dc=com
scope = sub

query_filter = (registeredAddress=%d)
result_attribute = registeredAddress