ansible-playbooks/roles/common/templates/postfix/main.cf.j2

{% if ansible_prolog -%}
{% from 'templates/ansible/prolog.j2' import prolog with context %}
{{ prolog() }}
{% endif -%}

# See /usr/share/postfix/main.cf.dist for a commented, more complete version

# Debian specific:  Specifying a file name will cause the first
# line of that file to be used as the name.  The Debian default
# is /etc/mailname.

smtpd_banner = $myhostname ESMTP $mail_name
biff = no

# appending .domain is the MUA's job.
append_dot_mydomain = no

# Uncomment the next line to generate "delayed mail" warnings
#delay_warning_time = 4h

readme_directory = no

# TLS parameters
smtpd_tls_cert_file=/etc/ssl/certs/ssl-cert-snakeoil.pem
smtpd_tls_key_file=/etc/ssl/private/ssl-cert-snakeoil.key
smtpd_use_tls=yes
smtpd_tls_session_cache_database = btree:${data_directory}/smtpd_scache
smtp_tls_session_cache_database = btree:${data_directory}/smtp_scache

# See /usr/share/doc/postfix/TLS_README.gz in the postfix-doc package for
# information on enabling SSL in the smtp client.

myhostname = {{ ansible_fqdn }}
myorigin = $myhostname
mydomain = $myhostname
mydestination = {{ ansible_fqdn }} {{ ansible_hostname }}

alias_maps = hash:/etc/aliases
alias_database = $alias_maps

{% if smtp_relay is defined %}
relayhost = {{ smtp_relay }}
{% endif %}

mynetworks = 127.0.0.0/8 [::ffff:127.0.0.0]/104 [::1]/128

mailbox_command = procmail -a "$EXTENSION"
mailbox_size_limit = 0

message_size_limit = 0

recipient_delimiter = +
inet_interfaces = all

disable_vrfy_command = yes

smtpd_recipient_restrictions =
    permit_mynetworks,
    reject_non_fqdn_sender,
    reject_unauth_pipelining,
    reject_non_fqdn_recipient,
    reject_unknown_sender_domain,
    reject_unauth_destination,
    reject_unknown_recipient_domain,
    permit

smtpd_client_restrictions =
    permit_mynetworks,
    reject_unauth_destination

smtpd_helo_required = yes
smtpd_helo_restrictions =
    permit_mynetworks,
    reject_non_fqdn_helo_hostname

smtpd_sender_restrictions =
    permit_mynetworks,
    reject_non_fqdn_sender,
    reject_unknown_sender_domain