# 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.
#myorigin = /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

# See http://www.postfix.org/COMPATIBILITY_README.html -- default to 2 on
# fresh installs.
compatibility_level = 3.6

# TLS parameters
#smtpd_tls_cert_file=/etc/letsencrypt/live/example.com/fullchain.pem
#smtpd_tls_key_file=/etc/letsencrypt/live/example.com/privkey.pem
#smtpd_use_tls=yes
#smtpd_tls_auth_only = yes
#smtp_tls_security_level = may
#smtpd_tls_security_level = may
#smtpd_sasl_security_options = noanonymous, noplaintext
#smtpd_sasl_tls_security_options = noanonymous

# Authentication
# SASL Auth for SMTP relaying
smtpd_sasl_type = dovecot
smtpd_sasl_path = private/auth
smtpd_sasl_authenticated_header = yes
smtpd_sasl_auth_enable = yes
smtpd_sasl_security_options = noanonymous
broken_sasl_auth_clients = yes

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

# Restrictions
smtpd_helo_restrictions =
        permit_mynetworks
        permit_sasl_authenticated
        reject_invalid_helo_hostname
        reject_non_fqdn_helo_hostname

smtpd_recipient_restrictions =
        permit_mynetworks
        permit_sasl_authenticated
        reject_non_fqdn_recipient
        reject_unknown_recipient_domain
        reject_unlisted_recipient
        reject_unauth_destination
        
smtpd_sender_restrictions =
        permit_mynetworks
        permit_sasl_authenticated
        reject_non_fqdn_sender
        reject_unknown_sender_domain
        reject_unknown_recipient_domain
        
smtpd_relay_restrictions =
        permit_mynetworks
        permit_sasl_authenticated
        defer_unauth_destination

smtpd_data_restrictions =
        reject_unauth_pipelining
        permit

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

myhostname = mail.esin.io
alias_maps = hash:/etc/postfix/aliases
alias_database = hash:/etc/postfix/aliases
mydomain = esin.io
myorigin = $mydomain
mydestination = 
relayhost =
mynetworks = 127.0.0.0/8 [::ffff:127.0.0.0]/104 [::1]/128
#mynetworks = all
mailbox_size_limit = 0
recipient_delimiter = +
inet_interfaces = all
inet_protocols = all

# Handing off local delivery to Dovecot's LMTP, and telling it where to store mail
#virtual_transport = virtual
virtual_transport = lmtp:unix:private/dovecot-lmtp


local_transport = virtual

# Virtual domains, users, and aliases
#virtual_mailbox_domains = mysql:/etc/postfix/mysql-virtual-mailbox-domains.cf
#virtual_mailbox_maps = mysql:/etc/postfix/mysql-virtual-mailbox-maps.cf
#virtual_alias_maps = mysql:/etc/postfix/mysql-virtual-alias-maps.cf,
#        mysql:/etc/postfix/mysql-virtual-email2email.cf

virtual_mailbox_base = /var/mail/domains
#virtual_mailbox_domains = proxy:pgsql:/etc/postfix/pgsql_virtual_domains_maps.cf
#virtual_mailbox_maps = proxy:pgsql:/etc/postfix/pgsql_virtual_mailbox_maps.cf, proxy:pgsql:/etc/postfix/pgsql_virtual_mailbox_domainaliases_maps.cf
#virtual_alias_maps = proxy:pgsql:/etc/postfix/pgsql_virtual_alias_maps.cf, proxy:pgsql:/etc/postfix/pgsql_virtual_alias_domainaliases_maps.cf

relay_domains = $mydestination, proxy:pgsql:/etc/postfix/pgsql/relay_domains.cf
virtual_alias_maps = proxy:pgsql:/etc/postfix/pgsql/virtual_alias_maps.cf
virtual_mailbox_domains = proxy:pgsql:/etc/postfix/pgsql/virtual_domains_maps.cf
virtual_mailbox_maps = proxy:pgsql:/etc/postfix/pgsql/virtual_mailbox_maps.cf
local_recipient_maps = $virtual_mailbox_maps
#smtpd_sender_login_maps = proxy:pgsql:/etc/postfix/pgsql/virtual_sender_maps.cf

virtual_mailbox_limit = 512000000
virtual_minimum_uid = 8

virtual_uid_maps = static:8
virtual_gid_maps = static:12

# Even more Restrictions and MTA params
disable_vrfy_command = yes
strict_rfc821_envelopes = yes
#smtpd_etrn_restrictions = reject
#smtpd_reject_unlisted_sender = yes
#smtpd_reject_unlisted_recipient = yes
smtpd_delay_reject = yes
smtpd_helo_required = yes
smtp_always_send_ehlo = yes
#smtpd_hard_error_limit = 1
smtpd_timeout = 30s
smtp_helo_timeout = 15s
smtp_rcpt_timeout = 15s
smtpd_recipient_limit = 40
minimal_backoff_time = 180s
maximal_backoff_time = 3h

# Reply Rejection Codes
invalid_hostname_reject_code = 550
non_fqdn_reject_code = 550
unknown_address_reject_code = 550
unknown_client_reject_code = 550
unknown_hostname_reject_code = 550
unverified_recipient_reject_code = 550
unverified_sender_reject_code = 550


mynetworks_style = subnet

# ---------------------------------
# Header manipulation
# --------------------------------------
 
# Getting rid of unwanted headers. See: https://posluns.com/guides/header-removal/
#header_checks = regexp:/etc/postfix/header_checks
# getting rid of x-original-to
enable_original_recipient = no

# ---------------------------------
# DKIM
# --------------------------------------
milter_default_action = accept
milter_protocol = 2
smtpd_milters = inet:8891
non_smtpd_milters = inet:8891

# ---------
# log
# --------
#maillog_file = /var/log/mail.log