main.cf

myorigin = /etc/mailname
myhostname = mail.mydomain.com

mydomain = mydomain.com
mydestination = $mydomain, $myhostname, localhost

smtpd_banner = $myhostname ESMTP $mail_name (PDP-11)
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
queue_run_delay = 300

readme_directory = /usr/share/doc/postfix

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

# Client auth
smtpd_sasl_type = dovecot
smtpd_sasl_path = private/auth
smtpd_sasl_auth_enable = yes

broken_sasl_auth_clients = yes
smtpd_recipient_restrictions = permit_mynetworks, permit_sasl_authenticated, reject_unauth_destination

# Smarthost
relayhost = [mail.provider.com]:587

# Smarthost auth
smtp_sasl_auth_enable = yes
smtp_sasl_security_options = noanonymous
smtp_sasl_password_maps = hash:/etc/postfix/sasl_password

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

mynetworks = 127.0.0.0/8 192.168.0.0/24

mailbox_command = /usr/lib/dovecot/deliver

mailbox_size_limit = 0
recipient_delimiter = +
inet_interfaces = all

inet_protocols = ipv4
html_directory = /usr/share/doc/postfix/html

# Transport Maps
transport_maps = hash:/etc/postfix/transport

# Aliases
sender_canonical_maps = hash:/etc/postfix/sender_canonical

local_recipient_maps =

# Spam and virus filter
content_filter = smtp-amavis:[127.0.0.1]:10024
receive_override_options = no_address_mappings